./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series.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-more-buffer-series.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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:51:07,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:51:07,325 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:51:07,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:51:07,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:51:07,358 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:51:07,358 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:51:07,359 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:51:07,360 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:51:07,361 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:51:07,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:51:07,362 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:51:07,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:51:07,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:51:07,365 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:51:07,365 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:51:07,365 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:51:07,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:51:07,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:51:07,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:51:07,366 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:51:07,369 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:51:07,370 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:51:07,370 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:51:07,370 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:51:07,370 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:51:07,371 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:51:07,371 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:51:07,371 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:51:07,371 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:51:07,372 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:51:07,372 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:51:07,373 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:51:07,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:07,373 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:51:07,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:51:07,374 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:51:07,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:51:07,374 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:51:07,374 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:51:07,374 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:51:07,375 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:51:07,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-11-19 09:51:07,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:51:07,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:51:07,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:51:07,664 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:51:07,665 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:51:07,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-19 09:51:09,098 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:51:09,294 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:51:09,295 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-19 09:51:09,306 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f15846275/9847d9ee14c545c2bbb2fd83435bb9f1/FLAG36331c026 [2024-11-19 09:51:09,677 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f15846275/9847d9ee14c545c2bbb2fd83435bb9f1 [2024-11-19 09:51:09,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:51:09,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:51:09,683 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:09,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:51:09,687 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:51:09,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:09" (1/1) ... [2024-11-19 09:51:09,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f97b5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:09, skipping insertion in model container [2024-11-19 09:51:09,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:09" (1/1) ... [2024-11-19 09:51:09,717 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:51:09,998 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 09:51:10,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:10,028 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:51:10,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:10,121 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:51:10,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10 WrapperNode [2024-11-19 09:51:10,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:10,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:10,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:51:10,126 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:51:10,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,180 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 342 [2024-11-19 09:51:10,180 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:10,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:51:10,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:51:10,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:51:10,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,195 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,213 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 09:51:10,214 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,214 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,247 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,253 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:51:10,254 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:51:10,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:51:10,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:51:10,256 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (1/1) ... [2024-11-19 09:51:10,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:10,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:10,287 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 09:51:10,290 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 09:51:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:51:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:51:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:51:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:51:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:51:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:51:10,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:51:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:51:10,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:51:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:51:10,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:51:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-19 09:51:10,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-19 09:51:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:51:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:51:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:51:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:51:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:51:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:51:10,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:51:10,334 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 09:51:10,451 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:51:10,453 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:51:10,964 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:51:10,964 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:51:11,375 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:51:11,377 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-19 09:51:11,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:11 BoogieIcfgContainer [2024-11-19 09:51:11,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:51:11,380 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:51:11,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:51:11,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:51:11,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:51:09" (1/3) ... [2024-11-19 09:51:11,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8759ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:11, skipping insertion in model container [2024-11-19 09:51:11,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:10" (2/3) ... [2024-11-19 09:51:11,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8759ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:11, skipping insertion in model container [2024-11-19 09:51:11,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:11" (3/3) ... [2024-11-19 09:51:11,386 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-11-19 09:51:11,402 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:51:11,403 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-19 09:51:11,403 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:51:11,482 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-19 09:51:11,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2024-11-19 09:51:11,558 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2024-11-19 09:51:11,559 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:51:11,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 73 events. 7/73 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-19 09:51:11,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2024-11-19 09:51:11,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2024-11-19 09:51:11,579 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:51:11,588 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;@4afda125, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:51:11,589 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-19 09:51:11,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:51:11,595 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:51:11,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:11,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:11,596 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:11,597 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:11,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:11,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1037210, now seen corresponding path program 1 times [2024-11-19 09:51:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:11,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230554241] [2024-11-19 09:51:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:11,946 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 09:51:11,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:11,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230554241] [2024-11-19 09:51:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230554241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:11,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:11,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:51:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358724211] [2024-11-19 09:51:11,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:11,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:12,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:12,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 09:51:12,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:12,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:12,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:15,176 INFO L124 PetriNetUnfolderBase]: 17936/23922 cut-off events. [2024-11-19 09:51:15,176 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-11-19 09:51:15,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46767 conditions, 23922 events. 17936/23922 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154876 event pairs, 11530 based on Foata normal form. 1/11174 useless extension candidates. Maximal degree in co-relation 44660. Up to 21814 conditions per place. [2024-11-19 09:51:15,397 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-19 09:51:15,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 244 flow [2024-11-19 09:51:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-19 09:51:15,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-19 09:51:15,410 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 126 transitions. [2024-11-19 09:51:15,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 244 flow [2024-11-19 09:51:15,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 09:51:15,446 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2024-11-19 09:51:15,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-11-19 09:51:15,452 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2024-11-19 09:51:15,452 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2024-11-19 09:51:15,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 09:51:15,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:15,453 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:15,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:51:15,453 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:15,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1037211, now seen corresponding path program 1 times [2024-11-19 09:51:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:15,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556730271] [2024-11-19 09:51:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:15,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:15,773 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 09:51:15,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:15,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556730271] [2024-11-19 09:51:15,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556730271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:15,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:15,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:15,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794037008] [2024-11-19 09:51:15,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:15,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:15,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:15,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:15,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:15,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:15,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 09:51:15,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:15,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:15,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:18,263 INFO L124 PetriNetUnfolderBase]: 17937/23925 cut-off events. [2024-11-19 09:51:18,264 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:18,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46151 conditions, 23925 events. 17937/23925 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154693 event pairs, 11530 based on Foata normal form. 0/11173 useless extension candidates. Maximal degree in co-relation 46114. Up to 21827 conditions per place. [2024-11-19 09:51:18,442 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 47 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-19 09:51:18,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 250 flow [2024-11-19 09:51:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-19 09:51:18,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-11-19 09:51:18,445 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 152 transitions. [2024-11-19 09:51:18,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 250 flow [2024-11-19 09:51:18,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:18,448 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 165 flow [2024-11-19 09:51:18,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-11-19 09:51:18,449 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2024-11-19 09:51:18,449 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 165 flow [2024-11-19 09:51:18,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 09:51:18,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:18,450 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:51:18,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:51:18,450 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:18,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 32156855, now seen corresponding path program 1 times [2024-11-19 09:51:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:18,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651959301] [2024-11-19 09:51:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:18,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:18,650 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 09:51:18,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:18,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651959301] [2024-11-19 09:51:18,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651959301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:18,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:18,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:18,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828149956] [2024-11-19 09:51:18,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:18,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:18,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:18,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:51:18,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:18,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 09:51:18,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:18,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:18,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:20,867 INFO L124 PetriNetUnfolderBase]: 17938/23928 cut-off events. [2024-11-19 09:51:20,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:20,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46168 conditions, 23928 events. 17938/23928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154804 event pairs, 11530 based on Foata normal form. 0/11175 useless extension candidates. Maximal degree in co-relation 46143. Up to 21826 conditions per place. [2024-11-19 09:51:21,049 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 47 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-11-19 09:51:21,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 279 flow [2024-11-19 09:51:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-19 09:51:21,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-11-19 09:51:21,052 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 165 flow. Second operand 5 states and 180 transitions. [2024-11-19 09:51:21,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 279 flow [2024-11-19 09:51:21,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:21,055 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 199 flow [2024-11-19 09:51:21,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-19 09:51:21,056 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2024-11-19 09:51:21,056 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 199 flow [2024-11-19 09:51:21,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 09:51:21,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:21,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:51:21,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:51:21,057 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:21,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 996865588, now seen corresponding path program 1 times [2024-11-19 09:51:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356222258] [2024-11-19 09:51:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:21,284 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 09:51:21,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:21,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356222258] [2024-11-19 09:51:21,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356222258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:21,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:21,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144668001] [2024-11-19 09:51:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:21,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:21,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:51:21,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:21,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 09:51:21,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:21,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:21,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:23,276 INFO L124 PetriNetUnfolderBase]: 17939/23931 cut-off events. [2024-11-19 09:51:23,276 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:51:23,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46190 conditions, 23931 events. 17939/23931 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155066 event pairs, 11530 based on Foata normal form. 0/11179 useless extension candidates. Maximal degree in co-relation 46159. Up to 21829 conditions per place. [2024-11-19 09:51:23,436 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 48 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-11-19 09:51:23,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 319 flow [2024-11-19 09:51:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-19 09:51:23,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-11-19 09:51:23,438 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 199 flow. Second operand 5 states and 180 transitions. [2024-11-19 09:51:23,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 319 flow [2024-11-19 09:51:23,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:23,441 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 241 flow [2024-11-19 09:51:23,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-11-19 09:51:23,442 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2024-11-19 09:51:23,442 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 241 flow [2024-11-19 09:51:23,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 09:51:23,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:23,443 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:51:23,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:51:23,443 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:23,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash 996793698, now seen corresponding path program 1 times [2024-11-19 09:51:23,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:23,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366982891] [2024-11-19 09:51:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:23,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:23,598 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 09:51:23,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366982891] [2024-11-19 09:51:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366982891] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:23,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717164531] [2024-11-19 09:51:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:23,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:23,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:23,603 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 09:51:23,604 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 09:51:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:23,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:51:23,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:23,743 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 09:51:23,868 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 09:51:23,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:23,979 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 09:51:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717164531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:23,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:23,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:51:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465929957] [2024-11-19 09:51:23,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:23,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:51:23,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:51:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:51:24,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:24,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 09:51:24,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:24,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:24,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:26,372 INFO L124 PetriNetUnfolderBase]: 17939/23930 cut-off events. [2024-11-19 09:51:26,372 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 09:51:26,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46208 conditions, 23930 events. 17939/23930 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155028 event pairs, 11530 based on Foata normal form. 0/11181 useless extension candidates. Maximal degree in co-relation 46174. Up to 21829 conditions per place. [2024-11-19 09:51:26,526 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 49 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-19 09:51:26,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 73 transitions, 349 flow [2024-11-19 09:51:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:51:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:51:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-11-19 09:51:26,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-11-19 09:51:26,528 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 241 flow. Second operand 6 states and 201 transitions. [2024-11-19 09:51:26,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 73 transitions, 349 flow [2024-11-19 09:51:26,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:26,530 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 244 flow [2024-11-19 09:51:26,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2024-11-19 09:51:26,531 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2024-11-19 09:51:26,531 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 244 flow [2024-11-19 09:51:26,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 09:51:26,532 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:26,532 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:51:26,550 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 09:51:26,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:26,737 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:26,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:26,738 INFO L85 PathProgramCache]: Analyzing trace with hash 838001052, now seen corresponding path program 1 times [2024-11-19 09:51:26,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:26,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069417928] [2024-11-19 09:51:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:26,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:26,973 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 09:51:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069417928] [2024-11-19 09:51:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069417928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933306254] [2024-11-19 09:51:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:26,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:26,977 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 09:51:26,978 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 09:51:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:27,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:51:27,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:27,083 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 09:51:27,275 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 09:51:27,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:27,448 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 09:51:27,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933306254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:27,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:27,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:51:27,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239205062] [2024-11-19 09:51:27,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:27,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:51:27,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:27,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:51:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:51:27,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:27,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 244 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:27,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:27,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:27,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:29,771 INFO L124 PetriNetUnfolderBase]: 17939/23929 cut-off events. [2024-11-19 09:51:29,771 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:29,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46208 conditions, 23929 events. 17939/23929 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154949 event pairs, 11530 based on Foata normal form. 0/11181 useless extension candidates. Maximal degree in co-relation 46170. Up to 21821 conditions per place. [2024-11-19 09:51:29,964 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-19 09:51:29,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 350 flow [2024-11-19 09:51:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-11-19 09:51:29,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4230055658627087 [2024-11-19 09:51:29,966 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 244 flow. Second operand 7 states and 228 transitions. [2024-11-19 09:51:29,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 350 flow [2024-11-19 09:51:29,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 316 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-19 09:51:29,969 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 230 flow [2024-11-19 09:51:29,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2024-11-19 09:51:29,971 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2024-11-19 09:51:29,971 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 230 flow [2024-11-19 09:51:29,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:29,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:29,972 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-19 09:51:29,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:30,176 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 09:51:30,177 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:30,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash 210156802, now seen corresponding path program 1 times [2024-11-19 09:51:30,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:30,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923731403] [2024-11-19 09:51:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:30,404 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 09:51:30,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:30,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923731403] [2024-11-19 09:51:30,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923731403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:30,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224696844] [2024-11-19 09:51:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:30,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:30,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:30,408 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 09:51:30,409 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 09:51:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:30,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:51:30,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:30,732 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 09:51:30,894 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 09:51:30,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:31,008 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 09:51:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224696844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:31,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:51:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005508142] [2024-11-19 09:51:31,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:31,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:51:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:51:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:51:31,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:31,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 09:51:31,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:31,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:31,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:33,327 INFO L124 PetriNetUnfolderBase]: 17941/23934 cut-off events. [2024-11-19 09:51:33,327 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:33,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46216 conditions, 23934 events. 17941/23934 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154944 event pairs, 11530 based on Foata normal form. 0/11186 useless extension candidates. Maximal degree in co-relation 46155. Up to 21822 conditions per place. [2024-11-19 09:51:33,459 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 39 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-11-19 09:51:33,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 372 flow [2024-11-19 09:51:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:51:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:51:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-11-19 09:51:33,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4098124098124098 [2024-11-19 09:51:33,462 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 230 flow. Second operand 9 states and 284 transitions. [2024-11-19 09:51:33,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 372 flow [2024-11-19 09:51:33,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 345 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-19 09:51:33,464 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 267 flow [2024-11-19 09:51:33,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-11-19 09:51:33,465 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-19 09:51:33,466 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 267 flow [2024-11-19 09:51:33,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 09:51:33,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:33,466 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:33,483 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 09:51:33,668 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 09:51:33,669 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:33,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 182116694, now seen corresponding path program 1 times [2024-11-19 09:51:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:33,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111991727] [2024-11-19 09:51:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:33,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:33,731 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 09:51:33,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:33,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111991727] [2024-11-19 09:51:33,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111991727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:33,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:33,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:33,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379604705] [2024-11-19 09:51:33,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:33,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:33,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-19 09:51:33,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 09:51:33,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:33,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-19 09:51:33,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:35,678 INFO L124 PetriNetUnfolderBase]: 19389/26036 cut-off events. [2024-11-19 09:51:35,679 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:51:35,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50350 conditions, 26036 events. 19389/26036 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 171147 event pairs, 12584 based on Foata normal form. 396/13261 useless extension candidates. Maximal degree in co-relation 46094. Up to 21835 conditions per place. [2024-11-19 09:51:35,853 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 94 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2024-11-19 09:51:35,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 617 flow [2024-11-19 09:51:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-11-19 09:51:35,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6077922077922078 [2024-11-19 09:51:35,854 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 267 flow. Second operand 5 states and 234 transitions. [2024-11-19 09:51:35,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 617 flow [2024-11-19 09:51:35,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 545 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-19 09:51:35,858 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 287 flow [2024-11-19 09:51:35,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-11-19 09:51:35,858 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-19 09:51:35,859 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 287 flow [2024-11-19 09:51:35,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 09:51:35,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:35,859 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:35,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:51:35,859 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:35,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash 297941469, now seen corresponding path program 1 times [2024-11-19 09:51:35,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:35,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056961511] [2024-11-19 09:51:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:36,079 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 09:51:36,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:36,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056961511] [2024-11-19 09:51:36,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056961511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:36,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:36,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:51:36,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633552277] [2024-11-19 09:51:36,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:36,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:51:36,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:51:36,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:51:36,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:36,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 09:51:36,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:36,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:36,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:40,619 INFO L124 PetriNetUnfolderBase]: 46763/61724 cut-off events. [2024-11-19 09:51:40,619 INFO L125 PetriNetUnfolderBase]: For 2476/3526 co-relation queries the response was YES. [2024-11-19 09:51:40,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134521 conditions, 61724 events. 46763/61724 cut-off events. For 2476/3526 co-relation queries the response was YES. Maximal size of possible extension queue 4245. Compared 424118 event pairs, 16782 based on Foata normal form. 0/32488 useless extension candidates. Maximal degree in co-relation 119924. Up to 20456 conditions per place. [2024-11-19 09:51:40,962 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 186 selfloop transitions, 12 changer transitions 0/212 dead transitions. [2024-11-19 09:51:40,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 212 transitions, 1009 flow [2024-11-19 09:51:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 383 transitions. [2024-11-19 09:51:40,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217532467532467 [2024-11-19 09:51:40,964 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 287 flow. Second operand 8 states and 383 transitions. [2024-11-19 09:51:40,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 212 transitions, 1009 flow [2024-11-19 09:51:40,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 212 transitions, 1004 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:40,974 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 334 flow [2024-11-19 09:51:40,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-11-19 09:51:40,975 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2024-11-19 09:51:40,975 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 334 flow [2024-11-19 09:51:40,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 09:51:40,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:40,976 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:40,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:51:40,976 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:40,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:40,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2138009062, now seen corresponding path program 1 times [2024-11-19 09:51:40,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:40,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734913372] [2024-11-19 09:51:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:40,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:41,068 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 09:51:41,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:41,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734913372] [2024-11-19 09:51:41,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734913372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:41,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:41,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:41,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784313930] [2024-11-19 09:51:41,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:41,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:41,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:41,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:41,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:41,231 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-19 09:51:41,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:41,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:41,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-19 09:51:41,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:45,210 INFO L124 PetriNetUnfolderBase]: 36330/51170 cut-off events. [2024-11-19 09:51:45,210 INFO L125 PetriNetUnfolderBase]: For 5196/5196 co-relation queries the response was YES. [2024-11-19 09:51:45,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115848 conditions, 51170 events. 36330/51170 cut-off events. For 5196/5196 co-relation queries the response was YES. Maximal size of possible extension queue 3713. Compared 396721 event pairs, 28263 based on Foata normal form. 824/28806 useless extension candidates. Maximal degree in co-relation 96129. Up to 42963 conditions per place. [2024-11-19 09:51:45,567 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 97 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-11-19 09:51:45,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 706 flow [2024-11-19 09:51:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-11-19 09:51:45,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5922077922077922 [2024-11-19 09:51:45,569 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 334 flow. Second operand 5 states and 228 transitions. [2024-11-19 09:51:45,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 706 flow [2024-11-19 09:51:45,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 706 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:51:45,582 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 425 flow [2024-11-19 09:51:45,582 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2024-11-19 09:51:45,583 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-19 09:51:45,583 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 425 flow [2024-11-19 09:51:45,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:45,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:45,583 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:45,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:51:45,583 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:45,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1609686370, now seen corresponding path program 1 times [2024-11-19 09:51:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:45,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366068550] [2024-11-19 09:51:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:45,748 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 09:51:45,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366068550] [2024-11-19 09:51:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366068550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:45,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:45,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:51:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369117104] [2024-11-19 09:51:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:45,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:51:45,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:45,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 09:51:45,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:45,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:45,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand