./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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-three-array-sum.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 c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:32:34,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:32:34,936 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:32:34,939 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:32:34,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:32:34,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:32:34,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:32:34,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:32:34,961 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:32:34,961 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:32:34,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:32:34,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:32:34,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:32:34,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:32:34,963 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:32:34,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:32:34,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:32:34,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:32:34,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:32:34,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:32:34,965 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:32:34,966 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:32:34,966 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:32:34,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:32:34,967 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:32:34,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:32:34,967 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:32:34,968 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:32:34,968 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:32:34,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:32:34,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:32:34,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:32:34,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:32:34,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:32:34,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:32:34,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:32:34,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:32:34,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:32:34,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:32:34,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:32:34,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:32:34,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:32:34,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2024-11-12 16:32:35,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:32:35,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:32:35,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:32:35,264 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:32:35,265 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:32:35,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-12 16:32:36,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:32:36,876 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:32:36,876 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-12 16:32:36,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab85ff31b/4eddb36047384978bf6ed5fe2d458e77/FLAG96dee9458 [2024-11-12 16:32:36,896 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab85ff31b/4eddb36047384978bf6ed5fe2d458e77 [2024-11-12 16:32:36,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:32:36,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:32:36,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:32:36,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:32:36,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:32:36,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:32:36" (1/1) ... [2024-11-12 16:32:36,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21919ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:36, skipping insertion in model container [2024-11-12 16:32:36,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:32:36" (1/1) ... [2024-11-12 16:32:36,933 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:32:37,180 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:32:37,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:32:37,191 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:32:37,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:32:37,230 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:32:37,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37 WrapperNode [2024-11-12 16:32:37,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:32:37,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:32:37,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:32:37,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:32:37,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,270 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 140 [2024-11-12 16:32:37,271 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:32:37,271 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:32:37,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:32:37,272 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:32:37,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,288 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,306 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-12 16:32:37,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,315 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,321 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,323 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:32:37,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:32:37,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:32:37,329 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:32:37,329 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (1/1) ... [2024-11-12 16:32:37,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:32:37,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:37,364 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) [2024-11-12 16:32:37,371 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 [2024-11-12 16:32:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:32:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:32:37,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:32:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:32:37,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:32:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:32:37,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:32:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:32:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:32:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:32:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:32:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 16:32:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 16:32:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:32:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:32:37,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:32:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:32:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:32:37,425 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:32:37,555 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:32:37,558 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:32:38,071 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:32:38,071 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:32:38,386 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:32:38,386 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-12 16:32:38,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:32:38 BoogieIcfgContainer [2024-11-12 16:32:38,388 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:32:38,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:32:38,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:32:38,395 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:32:38,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:32:36" (1/3) ... [2024-11-12 16:32:38,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68783a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:32:38, skipping insertion in model container [2024-11-12 16:32:38,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:37" (2/3) ... [2024-11-12 16:32:38,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68783a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:32:38, skipping insertion in model container [2024-11-12 16:32:38,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:32:38" (3/3) ... [2024-11-12 16:32:38,398 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2024-11-12 16:32:38,417 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:32:38,417 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-12 16:32:38,417 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:32:38,493 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:32:38,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2024-11-12 16:32:38,571 INFO L124 PetriNetUnfolderBase]: 7/61 cut-off events. [2024-11-12 16:32:38,572 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:32:38,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 61 events. 7/61 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 152 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-11-12 16:32:38,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2024-11-12 16:32:38,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 138 flow [2024-11-12 16:32:38,596 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:32:38,605 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;@f326ce8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:32:38,605 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-12 16:32:38,608 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:32:38,612 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:32:38,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:32:38,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:38,613 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:32:38,614 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:38,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash 607425, now seen corresponding path program 1 times [2024-11-12 16:32:38,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:38,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428109191] [2024-11-12 16:32:38,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:38,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:38,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:38,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428109191] [2024-11-12 16:32:38,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428109191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:38,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:38,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:32:38,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324745720] [2024-11-12 16:32:38,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:38,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:32:38,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:32:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:32:38,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-12 16:32:38,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:38,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:38,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-12 16:32:38,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:39,472 INFO L124 PetriNetUnfolderBase]: 1588/2580 cut-off events. [2024-11-12 16:32:39,473 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-11-12 16:32:39,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4895 conditions, 2580 events. 1588/2580 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15398 event pairs, 1210 based on Foata normal form. 1/1918 useless extension candidates. Maximal degree in co-relation 4374. Up to 2144 conditions per place. [2024-11-12 16:32:39,503 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 38 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-12 16:32:39,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 208 flow [2024-11-12 16:32:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:32:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:32:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-11-12 16:32:39,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-11-12 16:32:39,519 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 101 transitions. [2024-11-12 16:32:39,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 208 flow [2024-11-12 16:32:39,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:32:39,533 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 120 flow [2024-11-12 16:32:39,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-11-12 16:32:39,541 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2024-11-12 16:32:39,541 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 120 flow [2024-11-12 16:32:39,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:39,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:39,542 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:32:39,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:32:39,543 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:39,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash 607426, now seen corresponding path program 1 times [2024-11-12 16:32:39,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:39,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835248342] [2024-11-12 16:32:39,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:39,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835248342] [2024-11-12 16:32:39,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835248342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:39,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:39,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:32:39,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008696374] [2024-11-12 16:32:39,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:39,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:32:39,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:32:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:32:39,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-12 16:32:39,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:39,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:39,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-12 16:32:39,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:40,207 INFO L124 PetriNetUnfolderBase]: 1589/2583 cut-off events. [2024-11-12 16:32:40,207 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-12 16:32:40,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 2583 events. 1589/2583 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15377 event pairs, 1210 based on Foata normal form. 0/1917 useless extension candidates. Maximal degree in co-relation 4754. Up to 2157 conditions per place. [2024-11-12 16:32:40,228 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-12 16:32:40,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 218 flow [2024-11-12 16:32:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:32:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:32:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-12 16:32:40,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48046875 [2024-11-12 16:32:40,230 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 120 flow. Second operand 4 states and 123 transitions. [2024-11-12 16:32:40,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 218 flow [2024-11-12 16:32:40,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:32:40,233 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 143 flow [2024-11-12 16:32:40,233 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-11-12 16:32:40,234 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2024-11-12 16:32:40,234 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 143 flow [2024-11-12 16:32:40,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:40,234 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:40,234 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:32:40,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:32:40,235 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:40,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:40,235 INFO L85 PathProgramCache]: Analyzing trace with hash 18832013, now seen corresponding path program 1 times [2024-11-12 16:32:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222142296] [2024-11-12 16:32:40,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222142296] [2024-11-12 16:32:40,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222142296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:40,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:40,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:32:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879484418] [2024-11-12 16:32:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:40,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:32:40,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:32:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:32:40,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-12 16:32:40,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:40,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:40,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-12 16:32:40,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:40,634 INFO L124 PetriNetUnfolderBase]: 1591/2593 cut-off events. [2024-11-12 16:32:40,635 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-12 16:32:40,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 2593 events. 1591/2593 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15431 event pairs, 1210 based on Foata normal form. 0/1928 useless extension candidates. Maximal degree in co-relation 4765. Up to 2155 conditions per place. [2024-11-12 16:32:40,655 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-12 16:32:40,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 261 flow [2024-11-12 16:32:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:32:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:32:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-12 16:32:40,658 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55078125 [2024-11-12 16:32:40,658 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 143 flow. Second operand 4 states and 141 transitions. [2024-11-12 16:32:40,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 261 flow [2024-11-12 16:32:40,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:32:40,662 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 196 flow [2024-11-12 16:32:40,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-11-12 16:32:40,664 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2024-11-12 16:32:40,664 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 196 flow [2024-11-12 16:32:40,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:40,664 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:40,664 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:32:40,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:32:40,665 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:40,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash 583755680, now seen corresponding path program 1 times [2024-11-12 16:32:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:40,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6179440] [2024-11-12 16:32:40,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:40,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:40,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:40,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6179440] [2024-11-12 16:32:40,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6179440] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:40,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27148695] [2024-11-12 16:32:40,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:40,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:40,962 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) [2024-11-12 16:32:40,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:32:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:41,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:32:41,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:41,119 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 [2024-11-12 16:32:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:41,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:41,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27148695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:41,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:41,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:32:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373196365] [2024-11-12 16:32:41,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:41,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:32:41,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:32:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:32:41,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-12 16:32:41,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:41,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:41,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-12 16:32:41,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:41,914 INFO L124 PetriNetUnfolderBase]: 1592/2595 cut-off events. [2024-11-12 16:32:41,914 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-12 16:32:41,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4854 conditions, 2595 events. 1592/2595 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15452 event pairs, 1210 based on Foata normal form. 0/1935 useless extension candidates. Maximal degree in co-relation 4770. Up to 2164 conditions per place. [2024-11-12 16:32:41,933 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-12 16:32:41,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 315 flow [2024-11-12 16:32:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:32:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:32:41,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-11-12 16:32:41,938 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39453125 [2024-11-12 16:32:41,938 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 196 flow. Second operand 8 states and 202 transitions. [2024-11-12 16:32:41,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 315 flow [2024-11-12 16:32:41,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:32:41,942 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 227 flow [2024-11-12 16:32:41,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-11-12 16:32:41,943 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-11-12 16:32:41,944 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 227 flow [2024-11-12 16:32:41,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:41,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:41,945 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:32:41,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:42,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:42,150 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:42,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:42,151 INFO L85 PathProgramCache]: Analyzing trace with hash 916558703, now seen corresponding path program 1 times [2024-11-12 16:32:42,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:42,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702194452] [2024-11-12 16:32:42,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:42,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:42,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:42,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702194452] [2024-11-12 16:32:42,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702194452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:42,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771215591] [2024-11-12 16:32:42,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:42,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:42,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:42,337 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) [2024-11-12 16:32:42,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:32:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:42,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:32:42,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:42,416 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 [2024-11-12 16:32:42,516 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:42,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:32:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:42,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771215591] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:32:42,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-12 16:32:42,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974716720] [2024-11-12 16:32:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:42,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:42,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:32:42,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-12 16:32:42,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:42,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:42,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-12 16:32:42,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:43,223 INFO L124 PetriNetUnfolderBase]: 3176/5161 cut-off events. [2024-11-12 16:32:43,224 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-12 16:32:43,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 5161 events. 3176/5161 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34576 event pairs, 2420 based on Foata normal form. 2/3848 useless extension candidates. Maximal degree in co-relation 4811. Up to 2158 conditions per place. [2024-11-12 16:32:43,258 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 77 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-11-12 16:32:43,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 480 flow [2024-11-12 16:32:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:32:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:32:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-12 16:32:43,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-12 16:32:43,263 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 227 flow. Second operand 5 states and 180 transitions. [2024-11-12 16:32:43,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 480 flow [2024-11-12 16:32:43,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 438 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-12 16:32:43,266 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 221 flow [2024-11-12 16:32:43,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-11-12 16:32:43,267 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-11-12 16:32:43,268 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 221 flow [2024-11-12 16:32:43,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:43,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:43,268 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:43,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:32:43,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:43,473 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:43,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:43,473 INFO L85 PathProgramCache]: Analyzing trace with hash 344637380, now seen corresponding path program 1 times [2024-11-12 16:32:43,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:43,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911225183] [2024-11-12 16:32:43,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:43,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:43,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911225183] [2024-11-12 16:32:43,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911225183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:43,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010910508] [2024-11-12 16:32:43,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:43,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:43,560 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) [2024-11-12 16:32:43,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:32:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:43,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:32:43,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:43,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:43,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010910508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:43,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:43,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 16:32:43,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869464830] [2024-11-12 16:32:43,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:43,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:32:43,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:32:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:32:43,835 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-12 16:32:43,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:43,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:43,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-12 16:32:43,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:44,683 INFO L124 PetriNetUnfolderBase]: 4764/7744 cut-off events. [2024-11-12 16:32:44,684 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-11-12 16:32:44,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14423 conditions, 7744 events. 4764/7744 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 50395 event pairs, 3630 based on Foata normal form. 2/5771 useless extension candidates. Maximal degree in co-relation 4785. Up to 4290 conditions per place. [2024-11-12 16:32:44,723 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 70 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-11-12 16:32:44,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 113 transitions, 571 flow [2024-11-12 16:32:44,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:32:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:32:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 298 transitions. [2024-11-12 16:32:44,726 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-11-12 16:32:44,726 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 221 flow. Second operand 9 states and 298 transitions. [2024-11-12 16:32:44,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 113 transitions, 571 flow [2024-11-12 16:32:44,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:32:44,731 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 373 flow [2024-11-12 16:32:44,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-11-12 16:32:44,733 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2024-11-12 16:32:44,733 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 373 flow [2024-11-12 16:32:44,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:44,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:44,734 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:44,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:32:44,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:44,939 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:44,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1482732715, now seen corresponding path program 1 times [2024-11-12 16:32:44,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:44,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090765695] [2024-11-12 16:32:44,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:44,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:45,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090765695] [2024-11-12 16:32:45,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090765695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:45,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:45,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:32:45,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085119135] [2024-11-12 16:32:45,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:45,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:45,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:45,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:45,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-12 16:32:45,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 373 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:45,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:45,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-12 16:32:45,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:45,899 INFO L124 PetriNetUnfolderBase]: 6124/10015 cut-off events. [2024-11-12 16:32:45,899 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2024-11-12 16:32:45,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 10015 events. 6124/10015 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 68369 event pairs, 4224 based on Foata normal form. 0/7093 useless extension candidates. Maximal degree in co-relation 6865. Up to 5273 conditions per place. [2024-11-12 16:32:45,956 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 97 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-11-12 16:32:45,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 729 flow [2024-11-12 16:32:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:32:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:32:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-11-12 16:32:45,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-12 16:32:45,958 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 373 flow. Second operand 6 states and 228 transitions. [2024-11-12 16:32:45,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 729 flow [2024-11-12 16:32:45,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 659 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-12 16:32:45,965 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 361 flow [2024-11-12 16:32:45,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-11-12 16:32:45,967 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2024-11-12 16:32:45,967 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 361 flow [2024-11-12 16:32:45,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:45,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:45,967 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:45,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:32:45,968 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:45,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1073711366, now seen corresponding path program 1 times [2024-11-12 16:32:45,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:45,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278847151] [2024-11-12 16:32:45,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:46,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:46,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278847151] [2024-11-12 16:32:46,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278847151] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:46,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:46,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:32:46,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957807898] [2024-11-12 16:32:46,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:46,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:46,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:46,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:46,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-12 16:32:46,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:46,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:46,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-12 16:32:46,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:46,874 INFO L124 PetriNetUnfolderBase]: 4074/6689 cut-off events. [2024-11-12 16:32:46,878 INFO L125 PetriNetUnfolderBase]: For 1340/1646 co-relation queries the response was YES. [2024-11-12 16:32:46,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13541 conditions, 6689 events. 4074/6689 cut-off events. For 1340/1646 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 39523 event pairs, 2922 based on Foata normal form. 0/5076 useless extension candidates. Maximal degree in co-relation 5556. Up to 4727 conditions per place. [2024-11-12 16:32:46,920 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 80 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-11-12 16:32:46,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 653 flow [2024-11-12 16:32:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:32:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:32:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-12 16:32:46,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-11-12 16:32:46,922 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 361 flow. Second operand 6 states and 211 transitions. [2024-11-12 16:32:46,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 653 flow [2024-11-12 16:32:46,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 621 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:46,929 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 387 flow [2024-11-12 16:32:46,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-12 16:32:46,931 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2024-11-12 16:32:46,932 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 387 flow [2024-11-12 16:32:46,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:46,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:46,932 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-12 16:32:46,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:32:46,933 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:46,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash -626935898, now seen corresponding path program 2 times [2024-11-12 16:32:46,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:46,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095532926] [2024-11-12 16:32:46,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:46,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:47,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095532926] [2024-11-12 16:32:47,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095532926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:47,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196647994] [2024-11-12 16:32:47,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:32:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:47,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:47,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:32:47,299 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:32:47,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:47,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 16:32:47,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:47,319 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 [2024-11-12 16:32:47,456 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:47,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:32:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:47,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:47,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196647994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:47,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:47,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:32:47,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320154247] [2024-11-12 16:32:47,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:47,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:32:47,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:32:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:32:48,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-12 16:32:48,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 387 flow. Second operand has 19 states, 19 states have (on average 20.57894736842105) internal successors, (391), 19 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:48,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:48,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-12 16:32:48,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:49,618 INFO L124 PetriNetUnfolderBase]: 3861/6238 cut-off events. [2024-11-12 16:32:49,618 INFO L125 PetriNetUnfolderBase]: For 2051/2396 co-relation queries the response was YES. [2024-11-12 16:32:49,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13593 conditions, 6238 events. 3861/6238 cut-off events. For 2051/2396 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38556 event pairs, 3085 based on Foata normal form. 12/4800 useless extension candidates. Maximal degree in co-relation 5521. Up to 3200 conditions per place. [2024-11-12 16:32:49,658 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 90 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-11-12 16:32:49,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 132 transitions, 823 flow [2024-11-12 16:32:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:32:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:32:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 355 transitions. [2024-11-12 16:32:49,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4622395833333333 [2024-11-12 16:32:49,661 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 387 flow. Second operand 12 states and 355 transitions. [2024-11-12 16:32:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 132 transitions, 823 flow [2024-11-12 16:32:49,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 132 transitions, 788 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:49,668 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 482 flow [2024-11-12 16:32:49,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=482, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-11-12 16:32:49,669 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 29 predicate places. [2024-11-12 16:32:49,669 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 482 flow [2024-11-12 16:32:49,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.57894736842105) internal successors, (391), 19 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:49,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:49,670 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-12 16:32:49,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:49,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:49,875 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:49,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1189957061, now seen corresponding path program 3 times [2024-11-12 16:32:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:49,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238841737] [2024-11-12 16:32:49,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:50,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238841737] [2024-11-12 16:32:50,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238841737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:50,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178897484] [2024-11-12 16:32:50,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:32:50,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:50,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:50,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:50,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:32:50,104 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:32:50,104 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:50,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:32:50,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:50,127 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 [2024-11-12 16:32:50,228 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-11-12 16:32:50,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2024-11-12 16:32:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:32:50,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:32:50,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178897484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:50,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:50,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:32:50,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728129750] [2024-11-12 16:32:50,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:50,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:32:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:32:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:32:51,043 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-12 16:32:51,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 482 flow. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:51,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:51,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-12 16:32:51,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:52,546 INFO L124 PetriNetUnfolderBase]: 3979/6248 cut-off events. [2024-11-12 16:32:52,546 INFO L125 PetriNetUnfolderBase]: For 2075/2367 co-relation queries the response was YES. [2024-11-12 16:32:52,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13965 conditions, 6248 events. 3979/6248 cut-off events. For 2075/2367 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37930 event pairs, 3262 based on Foata normal form. 6/4800 useless extension candidates. Maximal degree in co-relation 13858. Up to 5549 conditions per place. [2024-11-12 16:32:52,606 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 35 selfloop transitions, 53 changer transitions 0/100 dead transitions. [2024-11-12 16:32:52,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 739 flow [2024-11-12 16:32:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 16:32:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 16:32:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 469 transitions. [2024-11-12 16:32:52,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36640625 [2024-11-12 16:32:52,610 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 482 flow. Second operand 20 states and 469 transitions. [2024-11-12 16:32:52,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 739 flow [2024-11-12 16:32:52,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 650 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-12 16:32:52,621 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 580 flow [2024-11-12 16:32:52,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=580, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2024-11-12 16:32:52,623 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 35 predicate places. [2024-11-12 16:32:52,623 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 580 flow [2024-11-12 16:32:52,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:52,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:52,624 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:52,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:32:52,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-12 16:32:52,828 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:52,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:52,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341589, now seen corresponding path program 1 times [2024-11-12 16:32:52,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:52,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655968015] [2024-11-12 16:32:52,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:52,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:52,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655968015] [2024-11-12 16:32:52,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655968015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:52,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:52,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:32:52,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849778944] [2024-11-12 16:32:52,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:52,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:32:52,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:32:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:32:52,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-12 16:32:52,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 580 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:52,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:52,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-12 16:32:52,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:53,268 INFO L124 PetriNetUnfolderBase]: 2920/4587 cut-off events. [2024-11-12 16:32:53,268 INFO L125 PetriNetUnfolderBase]: For 1216/1444 co-relation queries the response was YES. [2024-11-12 16:32:53,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10159 conditions, 4587 events. 2920/4587 cut-off events. For 1216/1444 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26110 event pairs, 2345 based on Foata normal form. 0/3660 useless extension candidates. Maximal degree in co-relation 5590. Up to 4038 conditions per place. [2024-11-12 16:32:53,288 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 78 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-11-12 16:32:53,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 748 flow [2024-11-12 16:32:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:32:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:32:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-12 16:32:53,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-12 16:32:53,290 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 580 flow. Second operand 4 states and 116 transitions. [2024-11-12 16:32:53,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 748 flow [2024-11-12 16:32:53,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 98 transitions, 551 flow, removed 37 selfloop flow, removed 14 redundant places. [2024-11-12 16:32:53,297 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 395 flow [2024-11-12 16:32:53,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=395, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-11-12 16:32:53,298 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2024-11-12 16:32:53,298 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 395 flow [2024-11-12 16:32:53,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:53,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:53,298 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:53,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:32:53,298 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:53,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341588, now seen corresponding path program 1 times [2024-11-12 16:32:53,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:53,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647228556] [2024-11-12 16:32:53,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:53,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:53,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647228556] [2024-11-12 16:32:53,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647228556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:53,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:53,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:32:53,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333717608] [2024-11-12 16:32:53,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:53,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:53,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:53,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-12 16:32:53,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 395 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:53,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:53,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-12 16:32:53,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:53,731 INFO L124 PetriNetUnfolderBase]: 2988/4757 cut-off events. [2024-11-12 16:32:53,731 INFO L125 PetriNetUnfolderBase]: For 1149/1509 co-relation queries the response was YES. [2024-11-12 16:32:53,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10063 conditions, 4757 events. 2988/4757 cut-off events. For 1149/1509 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27630 event pairs, 2214 based on Foata normal form. 0/3612 useless extension candidates. Maximal degree in co-relation 4603. Up to 3896 conditions per place. [2024-11-12 16:32:53,754 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 85 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-11-12 16:32:53,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 669 flow [2024-11-12 16:32:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:32:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:32:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-11-12 16:32:53,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-12 16:32:53,756 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 395 flow. Second operand 6 states and 200 transitions. [2024-11-12 16:32:53,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 669 flow [2024-11-12 16:32:53,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 660 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:32:53,763 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 439 flow [2024-11-12 16:32:53,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=439, PETRI_PLACES=90, PETRI_TRANSITIONS=99} [2024-11-12 16:32:53,764 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 27 predicate places. [2024-11-12 16:32:53,764 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 439 flow [2024-11-12 16:32:53,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:53,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:53,766 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:53,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:32:53,766 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:53,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:53,766 INFO L85 PathProgramCache]: Analyzing trace with hash 26888348, now seen corresponding path program 1 times [2024-11-12 16:32:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:53,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298501811] [2024-11-12 16:32:53,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:32:53,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:53,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298501811] [2024-11-12 16:32:53,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298501811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:53,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:53,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:32:53,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105590203] [2024-11-12 16:32:53,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:53,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:53,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-12 16:32:53,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 99 transitions, 439 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 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) [2024-11-12 16:32:53,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:53,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-12 16:32:53,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:54,152 INFO L124 PetriNetUnfolderBase]: 2322/4007 cut-off events. [2024-11-12 16:32:54,152 INFO L125 PetriNetUnfolderBase]: For 1162/1418 co-relation queries the response was YES. [2024-11-12 16:32:54,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8596 conditions, 4007 events. 2322/4007 cut-off events. For 1162/1418 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24681 event pairs, 1720 based on Foata normal form. 0/3277 useless extension candidates. Maximal degree in co-relation 4822. Up to 3145 conditions per place. [2024-11-12 16:32:54,166 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 74 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2024-11-12 16:32:54,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 97 transitions, 607 flow [2024-11-12 16:32:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:32:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:32:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-12 16:32:54,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-11-12 16:32:54,167 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 439 flow. Second operand 5 states and 129 transitions. [2024-11-12 16:32:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 97 transitions, 607 flow [2024-11-12 16:32:54,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 97 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:54,172 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 422 flow [2024-11-12 16:32:54,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-11-12 16:32:54,172 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-11-12 16:32:54,172 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 422 flow [2024-11-12 16:32:54,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 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) [2024-11-12 16:32:54,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:54,173 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:54,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:32:54,173 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:32:54,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:54,173 INFO L85 PathProgramCache]: Analyzing trace with hash 26888349, now seen corresponding path program 1 times [2024-11-12 16:32:54,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:54,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455369137] [2024-11-12 16:32:54,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:54,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:54,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:54,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455369137] [2024-11-12 16:32:54,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455369137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:54,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666127730] [2024-11-12 16:32:54,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:54,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:54,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:54,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:54,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:32:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:54,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-12 16:32:54,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:54,549 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 [2024-11-12 16:32:54,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:32:54,604 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:54,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-12 16:32:54,627 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:32:54,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:32:54,747 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-12 16:32:54,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-12 16:32:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:32:55,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:32:55,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666127730] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:55,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:32:55,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-12 16:32:55,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409714574] [2024-11-12 16:32:55,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:55,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:32:55,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:55,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:32:55,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-12 16:32:55,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-12 16:32:55,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2024-11-12 16:32:55,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:55,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-12 16:32:55,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:59,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:05,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:09,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:13,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:17,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:21,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:25,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:29,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:33,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:33,882 INFO L124 PetriNetUnfolderBase]: 3769/6196 cut-off events. [2024-11-12 16:33:33,882 INFO L125 PetriNetUnfolderBase]: For 1668/2064 co-relation queries the response was YES. [2024-11-12 16:33:33,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13555 conditions, 6196 events. 3769/6196 cut-off events. For 1668/2064 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 39464 event pairs, 1463 based on Foata normal form. 0/4867 useless extension candidates. Maximal degree in co-relation 7514. Up to 3154 conditions per place. [2024-11-12 16:33:33,899 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 103 selfloop transitions, 23 changer transitions 0/136 dead transitions. [2024-11-12 16:33:33,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 136 transitions, 800 flow [2024-11-12 16:33:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:33:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:33:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-11-12 16:33:33,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5044642857142857 [2024-11-12 16:33:33,901 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 422 flow. Second operand 7 states and 226 transitions. [2024-11-12 16:33:33,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 136 transitions, 800 flow [2024-11-12 16:33:33,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 136 transitions, 783 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:33:33,905 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 496 flow [2024-11-12 16:33:33,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-11-12 16:33:33,906 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 31 predicate places. [2024-11-12 16:33:33,906 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 496 flow [2024-11-12 16:33:33,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2024-11-12 16:33:33,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:33,906 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:33,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:33:34,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:34,107 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:33:34,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash 833539474, now seen corresponding path program 1 times [2024-11-12 16:33:34,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:34,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271186672] [2024-11-12 16:33:34,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:34,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:33:34,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:34,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271186672] [2024-11-12 16:33:34,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271186672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:34,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:33:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433712615] [2024-11-12 16:33:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:34,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:33:34,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:33:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:33:34,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-12 16:33:34,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 496 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:34,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:34,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-12 16:33:34,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:34,462 INFO L124 PetriNetUnfolderBase]: 2785/4766 cut-off events. [2024-11-12 16:33:34,462 INFO L125 PetriNetUnfolderBase]: For 5605/6141 co-relation queries the response was YES. [2024-11-12 16:33:34,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12441 conditions, 4766 events. 2785/4766 cut-off events. For 5605/6141 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29499 event pairs, 1992 based on Foata normal form. 172/4234 useless extension candidates. Maximal degree in co-relation 7244. Up to 3757 conditions per place. [2024-11-12 16:33:34,481 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 75 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-11-12 16:33:34,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 99 transitions, 670 flow [2024-11-12 16:33:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-12 16:33:34,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-12 16:33:34,482 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 496 flow. Second operand 5 states and 128 transitions. [2024-11-12 16:33:34,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 99 transitions, 670 flow [2024-11-12 16:33:34,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:33:34,488 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 517 flow [2024-11-12 16:33:34,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=517, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-11-12 16:33:34,489 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 32 predicate places. [2024-11-12 16:33:34,489 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 517 flow [2024-11-12 16:33:34,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:34,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:34,489 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:34,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:33:34,490 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:33:34,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash 833539475, now seen corresponding path program 1 times [2024-11-12 16:33:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:34,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044881038] [2024-11-12 16:33:34,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:34,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:34,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044881038] [2024-11-12 16:33:34,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044881038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727530746] [2024-11-12 16:33:34,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:34,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:34,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:34,685 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:33:34,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:33:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:34,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:33:34,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:34,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:33:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:33:34,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:33:34,835 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:33:34,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:33:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:34,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:34,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-12 16:33:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:35,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727530746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:35,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:35,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 16:33:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996547040] [2024-11-12 16:33:35,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:35,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:33:35,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:33:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:33:35,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-12 16:33:35,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 517 flow. Second operand has 13 states, 13 states have (on average 20.46153846153846) internal successors, (266), 13 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:35,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:35,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-12 16:33:35,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:35,869 INFO L124 PetriNetUnfolderBase]: 3787/6078 cut-off events. [2024-11-12 16:33:35,869 INFO L125 PetriNetUnfolderBase]: For 5137/5935 co-relation queries the response was YES. [2024-11-12 16:33:35,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15889 conditions, 6078 events. 3787/6078 cut-off events. For 5137/5935 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 36785 event pairs, 2027 based on Foata normal form. 200/5304 useless extension candidates. Maximal degree in co-relation 9056. Up to 3582 conditions per place. [2024-11-12 16:33:35,901 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 98 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-11-12 16:33:35,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 879 flow [2024-11-12 16:33:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:33:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:33:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-11-12 16:33:35,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2024-11-12 16:33:35,902 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 517 flow. Second operand 8 states and 228 transitions. [2024-11-12 16:33:35,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 879 flow [2024-11-12 16:33:35,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 134 transitions, 858 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:33:35,911 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 565 flow [2024-11-12 16:33:35,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=565, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2024-11-12 16:33:35,912 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 37 predicate places. [2024-11-12 16:33:35,912 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 565 flow [2024-11-12 16:33:35,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.46153846153846) internal successors, (266), 13 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:35,912 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:35,912 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:35,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:33:36,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:36,113 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:33:36,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:36,114 INFO L85 PathProgramCache]: Analyzing trace with hash 19190448, now seen corresponding path program 1 times [2024-11-12 16:33:36,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:36,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267678210] [2024-11-12 16:33:36,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:36,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:36,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:36,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267678210] [2024-11-12 16:33:36,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267678210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:36,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540466863] [2024-11-12 16:33:36,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:36,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:36,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:36,272 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:33:36,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:33:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:36,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 16:33:36,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:36,382 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 [2024-11-12 16:33:36,461 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:33:36,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:33:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:36,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:36,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540466863] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:36,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:33:36,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2024-11-12 16:33:36,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291946373] [2024-11-12 16:33:36,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:36,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:33:36,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:33:36,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:33:36,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-12 16:33:36,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:36,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:36,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-12 16:33:36,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:37,399 INFO L124 PetriNetUnfolderBase]: 4946/7937 cut-off events. [2024-11-12 16:33:37,399 INFO L125 PetriNetUnfolderBase]: For 14988/16222 co-relation queries the response was YES. [2024-11-12 16:33:37,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22725 conditions, 7937 events. 4946/7937 cut-off events. For 14988/16222 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 49250 event pairs, 2030 based on Foata normal form. 0/6615 useless extension candidates. Maximal degree in co-relation 13046. Up to 3694 conditions per place. [2024-11-12 16:33:37,431 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 113 selfloop transitions, 18 changer transitions 0/141 dead transitions. [2024-11-12 16:33:37,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 141 transitions, 1024 flow [2024-11-12 16:33:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:33:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:33:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-12 16:33:37,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5111607142857143 [2024-11-12 16:33:37,433 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 565 flow. Second operand 7 states and 229 transitions. [2024-11-12 16:33:37,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 141 transitions, 1024 flow [2024-11-12 16:33:37,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 141 transitions, 974 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:33:37,444 INFO L231 Difference]: Finished difference. Result has 103 places, 104 transitions, 609 flow [2024-11-12 16:33:37,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=609, PETRI_PLACES=103, PETRI_TRANSITIONS=104} [2024-11-12 16:33:37,444 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 40 predicate places. [2024-11-12 16:33:37,445 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 104 transitions, 609 flow [2024-11-12 16:33:37,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:37,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:37,446 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:37,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 16:33:37,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 16:33:37,647 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:33:37,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash 19190444, now seen corresponding path program 1 times [2024-11-12 16:33:37,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:37,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53872231] [2024-11-12 16:33:37,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:33:37,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:37,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53872231] [2024-11-12 16:33:37,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53872231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:37,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497558225] [2024-11-12 16:33:37,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:37,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:37,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:37,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:33:37,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:33:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:37,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-12 16:33:37,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:38,000 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 [2024-11-12 16:33:38,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:33:38,046 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:33:38,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:33:38,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:33:38,147 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-12 16:33:38,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-12 16:33:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:38,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:38,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497558225] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:38,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:33:38,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-12 16:33:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154337847] [2024-11-12 16:33:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:38,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:33:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:33:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-12 16:33:38,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-12 16:33:38,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 104 transitions, 609 flow. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:38,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:38,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-12 16:33:38,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:43,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:51,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:55,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:33:59,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:34:03,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:34:07,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:34:07,831 INFO L124 PetriNetUnfolderBase]: 4514/7095 cut-off events. [2024-11-12 16:34:07,831 INFO L125 PetriNetUnfolderBase]: For 12758/14060 co-relation queries the response was YES. [2024-11-12 16:34:07,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21897 conditions, 7095 events. 4514/7095 cut-off events. For 12758/14060 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 41526 event pairs, 1528 based on Foata normal form. 0/6517 useless extension candidates. Maximal degree in co-relation 12534. Up to 3229 conditions per place. [2024-11-12 16:34:07,863 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 103 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-11-12 16:34:07,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 138 transitions, 1018 flow [2024-11-12 16:34:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:34:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:34:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-11-12 16:34:07,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5066964285714286 [2024-11-12 16:34:07,865 INFO L175 Difference]: Start difference. First operand has 103 places, 104 transitions, 609 flow. Second operand 7 states and 227 transitions. [2024-11-12 16:34:07,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 138 transitions, 1018 flow [2024-11-12 16:34:07,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 138 transitions, 1000 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:34:07,878 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 692 flow [2024-11-12 16:34:07,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=692, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-11-12 16:34:07,879 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 44 predicate places. [2024-11-12 16:34:07,879 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 692 flow [2024-11-12 16:34:07,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:34:07,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:34:07,880 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:34:07,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:34:08,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 16:34:08,085 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-12 16:34:08,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:34:08,085 INFO L85 PathProgramCache]: Analyzing trace with hash 19190446, now seen corresponding path program 1 times [2024-11-12 16:34:08,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:34:08,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171431683] [2024-11-12 16:34:08,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:34:08,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:34:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:34:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:34:08,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:34:08,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171431683] [2024-11-12 16:34:08,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171431683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:34:08,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584213010] [2024-11-12 16:34:08,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:34:08,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:34:08,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:34:08,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:34:08,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:34:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:34:08,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:34:08,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:34:08,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:34:08,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:34:08,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:34:08,384 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:34:08,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:34:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:34:08,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:34:08,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-12 16:34:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:34:08,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584213010] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:34:08,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:34:08,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 16:34:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163980893] [2024-11-12 16:34:08,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:34:08,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:34:08,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:34:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:34:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156