./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 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-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-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:54:42,778 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:54:42,843 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:54:42,849 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:54:42,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:54:42,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:54:42,882 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:54:42,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:54:42,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:54:42,885 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:54:42,886 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:54:42,886 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:54:42,886 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:54:42,887 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:54:42,889 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:54:42,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:54:42,889 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:54:42,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:54:42,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:54:42,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:54:42,890 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:54:42,893 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:54:42,894 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:54:42,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:54:42,894 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:54:42,894 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:54:42,895 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:54:42,895 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:54:42,895 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:54:42,896 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:54:42,896 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:54:42,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:54:42,897 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:54:42,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:54:42,898 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:54:42,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:54:42,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:54:42,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:54:42,899 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:54:42,899 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:54:42,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:54:42,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:54:42,900 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2024-11-19 09:54:43,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:54:43,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:54:43,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:54:43,235 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:54:43,236 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:54:43,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-19 09:54:44,630 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:54:44,831 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:54:44,832 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-19 09:54:44,839 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15f8fc460/624d84a793f94a8fbdff43ebaa344176/FLAG29785b58a [2024-11-19 09:54:44,852 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15f8fc460/624d84a793f94a8fbdff43ebaa344176 [2024-11-19 09:54:44,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:54:44,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:54:44,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:54:44,857 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:54:44,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:54:44,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:54:44" (1/1) ... [2024-11-19 09:54:44,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19983163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:44, skipping insertion in model container [2024-11-19 09:54:44,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:54:44" (1/1) ... [2024-11-19 09:54:44,888 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:54:45,105 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:54:45,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:54:45,124 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:54:45,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:54:45,167 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:54:45,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45 WrapperNode [2024-11-19 09:54:45,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:54:45,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:54:45,172 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:54:45,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:54:45,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,183 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,203 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 140 [2024-11-19 09:54:45,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:54:45,204 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:54:45,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:54:45,205 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:54:45,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,221 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,238 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]. [2024-11-19 09:54:45,238 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,239 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,248 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,252 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:54:45,259 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:54:45,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:54:45,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:54:45,263 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:54:45,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:45,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:54:45,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:54:45,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:54:45,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:54:45,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:54:45,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:54:45,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:54:45,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:54:45,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:54:45,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:54:45,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:54:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:54:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:54:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:54:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:54:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:54:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:54:45,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:54:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:54:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:54:45,377 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:54:45,519 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:54:45,522 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:54:45,897 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:54:45,898 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:54:46,186 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:54:46,186 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-19 09:54:46,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:54:46 BoogieIcfgContainer [2024-11-19 09:54:46,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:54:46,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:54:46,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:54:46,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:54:46,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:54:44" (1/3) ... [2024-11-19 09:54:46,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d55a088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:54:46, skipping insertion in model container [2024-11-19 09:54:46,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (2/3) ... [2024-11-19 09:54:46,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d55a088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:54:46, skipping insertion in model container [2024-11-19 09:54:46,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:54:46" (3/3) ... [2024-11-19 09:54:46,199 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2024-11-19 09:54:46,219 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:54:46,219 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-19 09:54:46,219 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:54:46,298 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:54:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2024-11-19 09:54:46,372 INFO L124 PetriNetUnfolderBase]: 7/61 cut-off events. [2024-11-19 09:54:46,372 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:54:46,376 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. [2024-11-19 09:54:46,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2024-11-19 09:54:46,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 138 flow [2024-11-19 09:54:46,394 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:54:46,400 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;@54a0004, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:54:46,400 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-19 09:54:46,404 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:54:46,404 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:54:46,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:54:46,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:46,405 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:54:46,406 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:46,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash 607425, now seen corresponding path program 1 times [2024-11-19 09:54:46,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:46,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755922482] [2024-11-19 09:54:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:46,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755922482] [2024-11-19 09:54:46,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755922482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:46,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:46,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:54:46,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140972327] [2024-11-19 09:54:46,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:46,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:54:46,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:54:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:54:46,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-19 09:54:46,781 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) [2024-11-19 09:54:46,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:46,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-19 09:54:46,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:47,251 INFO L124 PetriNetUnfolderBase]: 1588/2580 cut-off events. [2024-11-19 09:54:47,252 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-11-19 09:54:47,263 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. [2024-11-19 09:54:47,281 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 38 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-19 09:54:47,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 208 flow [2024-11-19 09:54:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:54:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:54:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-11-19 09:54:47,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-11-19 09:54:47,296 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 101 transitions. [2024-11-19 09:54:47,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 208 flow [2024-11-19 09:54:47,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:54:47,307 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 120 flow [2024-11-19 09:54:47,309 INFO L260 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} [2024-11-19 09:54:47,313 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2024-11-19 09:54:47,313 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 120 flow [2024-11-19 09:54:47,314 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) [2024-11-19 09:54:47,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:47,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:54:47,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:54:47,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:47,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash 607426, now seen corresponding path program 1 times [2024-11-19 09:54:47,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:47,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725253387] [2024-11-19 09:54:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:47,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:47,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725253387] [2024-11-19 09:54:47,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725253387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:47,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:47,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:54:47,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560045960] [2024-11-19 09:54:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:47,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:47,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:47,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-19 09:54:47,716 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) [2024-11-19 09:54:47,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:47,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-19 09:54:47,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:48,111 INFO L124 PetriNetUnfolderBase]: 1589/2583 cut-off events. [2024-11-19 09:54:48,111 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-19 09:54:48,116 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. [2024-11-19 09:54:48,127 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-19 09:54:48,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 218 flow [2024-11-19 09:54:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-19 09:54:48,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48046875 [2024-11-19 09:54:48,130 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 120 flow. Second operand 4 states and 123 transitions. [2024-11-19 09:54:48,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 218 flow [2024-11-19 09:54:48,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:48,133 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 143 flow [2024-11-19 09:54:48,134 INFO L260 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} [2024-11-19 09:54:48,135 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2024-11-19 09:54:48,135 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 143 flow [2024-11-19 09:54:48,135 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) [2024-11-19 09:54:48,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:48,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:54:48,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:54:48,137 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:48,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash 18832013, now seen corresponding path program 1 times [2024-11-19 09:54:48,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:48,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827736463] [2024-11-19 09:54:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:48,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:48,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:48,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827736463] [2024-11-19 09:54:48,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827736463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:48,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:48,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:54:48,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536293561] [2024-11-19 09:54:48,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:48,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:48,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:48,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:48,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:48,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-19 09:54:48,287 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) [2024-11-19 09:54:48,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:48,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-19 09:54:48,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:48,592 INFO L124 PetriNetUnfolderBase]: 1591/2593 cut-off events. [2024-11-19 09:54:48,592 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-19 09:54:48,597 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. [2024-11-19 09:54:48,608 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-19 09:54:48,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 261 flow [2024-11-19 09:54:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-19 09:54:48,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55078125 [2024-11-19 09:54:48,611 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 143 flow. Second operand 4 states and 141 transitions. [2024-11-19 09:54:48,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 261 flow [2024-11-19 09:54:48,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:54:48,613 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 196 flow [2024-11-19 09:54:48,613 INFO L260 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} [2024-11-19 09:54:48,614 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2024-11-19 09:54:48,614 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 196 flow [2024-11-19 09:54:48,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:48,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:48,614 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:54:48,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:54:48,615 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:48,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:48,615 INFO L85 PathProgramCache]: Analyzing trace with hash 583755680, now seen corresponding path program 1 times [2024-11-19 09:54:48,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:48,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2487568] [2024-11-19 09:54:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:48,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:48,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:48,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2487568] [2024-11-19 09:54:48,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2487568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063133464] [2024-11-19 09:54:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:48,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:48,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:48,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:54:48,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:54:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:48,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:54:48,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:49,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:54:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:49,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:49,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063133464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:49,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:49,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:54:49,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523981972] [2024-11-19 09:54:49,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:49,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:54:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:54:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:54:49,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-19 09:54:49,334 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) [2024-11-19 09:54:49,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:49,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-19 09:54:49,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:49,742 INFO L124 PetriNetUnfolderBase]: 1592/2595 cut-off events. [2024-11-19 09:54:49,743 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-19 09:54:49,747 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. [2024-11-19 09:54:49,759 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-19 09:54:49,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 315 flow [2024-11-19 09:54:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:54:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:54:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-11-19 09:54:49,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39453125 [2024-11-19 09:54:49,764 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 196 flow. Second operand 8 states and 202 transitions. [2024-11-19 09:54:49,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 315 flow [2024-11-19 09:54:49,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:54:49,767 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 227 flow [2024-11-19 09:54:49,767 INFO L260 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} [2024-11-19 09:54:49,768 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-11-19 09:54:49,769 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 227 flow [2024-11-19 09:54:49,769 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) [2024-11-19 09:54:49,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:49,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:54:49,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:54:49,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:49,971 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:49,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash 916558703, now seen corresponding path program 1 times [2024-11-19 09:54:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:49,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149217038] [2024-11-19 09:54:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:49,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:50,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:50,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149217038] [2024-11-19 09:54:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149217038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:50,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629595315] [2024-11-19 09:54:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:50,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:50,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:50,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:54:50,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:54:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:50,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 09:54:50,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:50,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:54:50,381 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:54:50,382 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 [2024-11-19 09:54:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:50,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:50,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629595315] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:50,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:54:50,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-19 09:54:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158187326] [2024-11-19 09:54:50,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:50,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:54:50,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:54:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:54:50,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-19 09:54:50,535 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) [2024-11-19 09:54:50,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:50,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-19 09:54:50,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:51,205 INFO L124 PetriNetUnfolderBase]: 3176/5161 cut-off events. [2024-11-19 09:54:51,205 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-19 09:54:51,223 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. [2024-11-19 09:54:51,254 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 77 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-11-19 09:54:51,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 480 flow [2024-11-19 09:54:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:54:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:54:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-19 09:54:51,256 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-19 09:54:51,256 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 227 flow. Second operand 5 states and 180 transitions. [2024-11-19 09:54:51,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 480 flow [2024-11-19 09:54:51,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 438 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-19 09:54:51,259 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 221 flow [2024-11-19 09:54:51,259 INFO L260 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} [2024-11-19 09:54:51,260 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-11-19 09:54:51,260 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 221 flow [2024-11-19 09:54:51,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:51,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:51,261 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:51,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:54:51,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:51,466 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:51,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:51,466 INFO L85 PathProgramCache]: Analyzing trace with hash 344637380, now seen corresponding path program 1 times [2024-11-19 09:54:51,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:51,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872542313] [2024-11-19 09:54:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:51,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:51,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:51,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872542313] [2024-11-19 09:54:51,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872542313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:51,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842224842] [2024-11-19 09:54:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:51,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:51,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:51,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:54:51,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:54:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:51,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:54:51,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:51,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:51,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842224842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:51,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:51,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:54:51,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190869740] [2024-11-19 09:54:51,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:51,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:54:51,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:51,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:54:51,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:54:51,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-19 09:54:51,841 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) [2024-11-19 09:54:51,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:51,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-19 09:54:51,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:52,722 INFO L124 PetriNetUnfolderBase]: 4764/7744 cut-off events. [2024-11-19 09:54:52,723 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-11-19 09:54:52,735 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. [2024-11-19 09:54:52,765 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 70 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-11-19 09:54:52,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 113 transitions, 571 flow [2024-11-19 09:54:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:54:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:54:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 298 transitions. [2024-11-19 09:54:52,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-11-19 09:54:52,767 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 221 flow. Second operand 9 states and 298 transitions. [2024-11-19 09:54:52,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 113 transitions, 571 flow [2024-11-19 09:54:52,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:54:52,772 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 373 flow [2024-11-19 09:54:52,773 INFO L260 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} [2024-11-19 09:54:52,773 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2024-11-19 09:54:52,774 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 373 flow [2024-11-19 09:54:52,775 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) [2024-11-19 09:54:52,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:52,775 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:52,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:54:52,979 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 [2024-11-19 09:54:52,980 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:52,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1482732715, now seen corresponding path program 1 times [2024-11-19 09:54:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:52,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972189048] [2024-11-19 09:54:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:53,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:53,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972189048] [2024-11-19 09:54:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972189048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:53,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:53,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:54:53,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873199848] [2024-11-19 09:54:53,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:53,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:54:53,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:54:53,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:54:53,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:54:53,073 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) [2024-11-19 09:54:53,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:53,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:54:53,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:53,929 INFO L124 PetriNetUnfolderBase]: 6124/10015 cut-off events. [2024-11-19 09:54:53,930 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2024-11-19 09:54:53,948 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. [2024-11-19 09:54:54,067 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 97 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-11-19 09:54:54,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 729 flow [2024-11-19 09:54:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:54:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:54:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-11-19 09:54:54,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-19 09:54:54,070 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 373 flow. Second operand 6 states and 228 transitions. [2024-11-19 09:54:54,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 729 flow [2024-11-19 09:54:54,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 659 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-19 09:54:54,076 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 361 flow [2024-11-19 09:54:54,077 INFO L260 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} [2024-11-19 09:54:54,077 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2024-11-19 09:54:54,078 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 361 flow [2024-11-19 09:54:54,079 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) [2024-11-19 09:54:54,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:54,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:54,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:54:54,080 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:54,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1073711366, now seen corresponding path program 1 times [2024-11-19 09:54:54,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:54,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825726322] [2024-11-19 09:54:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:54,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:54,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825726322] [2024-11-19 09:54:54,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825726322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:54,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:54,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:54:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745280149] [2024-11-19 09:54:54,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:54,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:54:54,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:54:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:54:54,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:54:54,210 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) [2024-11-19 09:54:54,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:54,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:54:54,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:54,974 INFO L124 PetriNetUnfolderBase]: 4074/6689 cut-off events. [2024-11-19 09:54:54,974 INFO L125 PetriNetUnfolderBase]: For 1340/1646 co-relation queries the response was YES. [2024-11-19 09:54:54,986 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. [2024-11-19 09:54:55,013 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 80 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-11-19 09:54:55,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 653 flow [2024-11-19 09:54:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:54:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:54:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-19 09:54:55,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-11-19 09:54:55,015 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 361 flow. Second operand 6 states and 211 transitions. [2024-11-19 09:54:55,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 653 flow [2024-11-19 09:54:55,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 621 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:54:55,020 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 387 flow [2024-11-19 09:54:55,020 INFO L260 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} [2024-11-19 09:54:55,021 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2024-11-19 09:54:55,021 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 387 flow [2024-11-19 09:54:55,021 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) [2024-11-19 09:54:55,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:55,022 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-19 09:54:55,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:54:55,022 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:55,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:55,023 INFO L85 PathProgramCache]: Analyzing trace with hash -626935898, now seen corresponding path program 2 times [2024-11-19 09:54:55,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:55,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357022036] [2024-11-19 09:54:55,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:54:55,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:55,043 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:54:55,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:54:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:54:55,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:55,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357022036] [2024-11-19 09:54:55,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357022036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:55,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610591031] [2024-11-19 09:54:55,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:54:55,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:55,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:55,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:54:55,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:54:55,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:54:55,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:54:55,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 09:54:55,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:55,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:54:55,421 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:54:55,422 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 [2024-11-19 09:54:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:55,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:55,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610591031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:55,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:55,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-19 09:54:55,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176463083] [2024-11-19 09:54:55,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:55,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:54:55,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:55,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:54:55,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:54:56,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-19 09:54:56,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 387 flow. Second operand has 16 states, 16 states have (on average 20.75) internal successors, (332), 16 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:56,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:56,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-19 09:54:56,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:57,600 INFO L124 PetriNetUnfolderBase]: 5983/9321 cut-off events. [2024-11-19 09:54:57,600 INFO L125 PetriNetUnfolderBase]: For 3043/3515 co-relation queries the response was YES. [2024-11-19 09:54:57,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20705 conditions, 9321 events. 5983/9321 cut-off events. For 3043/3515 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 61165 event pairs, 4893 based on Foata normal form. 4/7169 useless extension candidates. Maximal degree in co-relation 7484. Up to 5124 conditions per place. [2024-11-19 09:54:57,670 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 76 selfloop transitions, 35 changer transitions 0/123 dead transitions. [2024-11-19 09:54:57,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 771 flow [2024-11-19 09:54:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:54:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:54:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2024-11-19 09:54:57,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43892045454545453 [2024-11-19 09:54:57,673 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 387 flow. Second operand 11 states and 309 transitions. [2024-11-19 09:54:57,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 771 flow [2024-11-19 09:54:57,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 720 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:54:57,754 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 467 flow [2024-11-19 09:54:57,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=467, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-11-19 09:54:57,755 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2024-11-19 09:54:57,756 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 467 flow [2024-11-19 09:54:57,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.75) internal successors, (332), 16 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:57,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:57,757 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:57,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:54:57,961 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 [2024-11-19 09:54:57,962 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:57,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341589, now seen corresponding path program 1 times [2024-11-19 09:54:57,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:57,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256945314] [2024-11-19 09:54:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:57,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:58,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:58,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256945314] [2024-11-19 09:54:58,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256945314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:58,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:58,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:54:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511944861] [2024-11-19 09:54:58,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:58,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:58,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:58,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:58,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:58,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-19 09:54:58,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:58,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:58,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-19 09:54:58,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:58,697 INFO L124 PetriNetUnfolderBase]: 4768/7556 cut-off events. [2024-11-19 09:54:58,697 INFO L125 PetriNetUnfolderBase]: For 2524/2893 co-relation queries the response was YES. [2024-11-19 09:54:58,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16796 conditions, 7556 events. 4768/7556 cut-off events. For 2524/2893 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48050 event pairs, 3825 based on Foata normal form. 0/6127 useless extension candidates. Maximal degree in co-relation 6051. Up to 6601 conditions per place. [2024-11-19 09:54:58,733 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 62 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-11-19 09:54:58,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 609 flow [2024-11-19 09:54:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-19 09:54:58,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-19 09:54:58,734 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 467 flow. Second operand 4 states and 116 transitions. [2024-11-19 09:54:58,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 609 flow [2024-11-19 09:54:58,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 564 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-19 09:54:58,743 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 440 flow [2024-11-19 09:54:58,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-11-19 09:54:58,743 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2024-11-19 09:54:58,744 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 440 flow [2024-11-19 09:54:58,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:58,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:58,744 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:58,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:54:58,744 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:58,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 26888348, now seen corresponding path program 1 times [2024-11-19 09:54:58,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:58,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890704398] [2024-11-19 09:54:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:58,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:58,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890704398] [2024-11-19 09:54:58,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890704398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:58,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:58,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:54:58,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478331697] [2024-11-19 09:54:58,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:58,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:54:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:58,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:54:58,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:54:58,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-19 09:54:58,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 440 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) [2024-11-19 09:54:58,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:58,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-19 09:54:58,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:59,518 INFO L124 PetriNetUnfolderBase]: 4081/6427 cut-off events. [2024-11-19 09:54:59,519 INFO L125 PetriNetUnfolderBase]: For 1977/2304 co-relation queries the response was YES. [2024-11-19 09:54:59,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14257 conditions, 6427 events. 4081/6427 cut-off events. For 1977/2304 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39548 event pairs, 3245 based on Foata normal form. 0/5296 useless extension candidates. Maximal degree in co-relation 5270. Up to 5635 conditions per place. [2024-11-19 09:54:59,558 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 58 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-11-19 09:54:59,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 580 flow [2024-11-19 09:54:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:54:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:54:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-19 09:54:59,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-11-19 09:54:59,560 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 440 flow. Second operand 5 states and 129 transitions. [2024-11-19 09:54:59,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 580 flow [2024-11-19 09:54:59,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:59,571 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 452 flow [2024-11-19 09:54:59,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-11-19 09:54:59,572 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2024-11-19 09:54:59,572 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 452 flow [2024-11-19 09:54:59,573 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) [2024-11-19 09:54:59,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:59,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:59,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:54:59,573 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:54:59,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash 26888349, now seen corresponding path program 1 times [2024-11-19 09:54:59,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:59,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726298694] [2024-11-19 09:54:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:59,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:59,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:59,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726298694] [2024-11-19 09:54:59,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726298694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:59,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736153206] [2024-11-19 09:54:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:59,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:59,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:59,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:00,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:55:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:00,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-19 09:55:00,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:00,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:55:00,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:55:00,163 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:55:00,164 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 [2024-11-19 09:55:00,183 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:55:00,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:55:00,297 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-19 09:55:00,300 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 [2024-11-19 09:55:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:00,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:01,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736153206] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:01,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:55:01,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-19 09:55:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516199912] [2024-11-19 09:55:01,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:01,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:55:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:55:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:55:01,442 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:55:01,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 452 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) [2024-11-19 09:55:01,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:01,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:55:01,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:09,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:13,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:17,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:21,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:26,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:30,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:30,615 INFO L124 PetriNetUnfolderBase]: 6453/10742 cut-off events. [2024-11-19 09:55:30,616 INFO L125 PetriNetUnfolderBase]: For 2988/3411 co-relation queries the response was YES. [2024-11-19 09:55:30,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23376 conditions, 10742 events. 6453/10742 cut-off events. For 2988/3411 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 77763 event pairs, 3477 based on Foata normal form. 0/8399 useless extension candidates. Maximal degree in co-relation 8575. Up to 5378 conditions per place. [2024-11-19 09:55:30,683 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 90 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-11-19 09:55:30,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 125 transitions, 812 flow [2024-11-19 09:55:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:55:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:55:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-19 09:55:30,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5111607142857143 [2024-11-19 09:55:30,685 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 452 flow. Second operand 7 states and 229 transitions. [2024-11-19 09:55:30,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 125 transitions, 812 flow [2024-11-19 09:55:30,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 794 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:30,700 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 531 flow [2024-11-19 09:55:30,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=531, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-11-19 09:55:30,701 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2024-11-19 09:55:30,701 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 531 flow [2024-11-19 09:55:30,701 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) [2024-11-19 09:55:30,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:30,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:30,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:55:30,902 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,SelfDestructingSolverStorable11 [2024-11-19 09:55:30,903 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:55:30,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:30,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341588, now seen corresponding path program 1 times [2024-11-19 09:55:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:30,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123312462] [2024-11-19 09:55:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:30,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:31,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:31,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123312462] [2024-11-19 09:55:31,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123312462] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:31,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:31,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:55:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96312232] [2024-11-19 09:55:31,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:31,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:55:31,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:31,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:55:31,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:55:31,025 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:55:31,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 531 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) [2024-11-19 09:55:31,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:31,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:55:31,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:31,554 INFO L124 PetriNetUnfolderBase]: 5527/8751 cut-off events. [2024-11-19 09:55:31,555 INFO L125 PetriNetUnfolderBase]: For 11983/13435 co-relation queries the response was YES. [2024-11-19 09:55:31,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22926 conditions, 8751 events. 5527/8751 cut-off events. For 11983/13435 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 55724 event pairs, 3790 based on Foata normal form. 0/7007 useless extension candidates. Maximal degree in co-relation 8141. Up to 6689 conditions per place. [2024-11-19 09:55:31,592 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 78 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-11-19 09:55:31,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 837 flow [2024-11-19 09:55:31,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:55:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:55:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-11-19 09:55:31,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-11-19 09:55:31,594 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 531 flow. Second operand 6 states and 199 transitions. [2024-11-19 09:55:31,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 837 flow [2024-11-19 09:55:31,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 833 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:55:31,604 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 585 flow [2024-11-19 09:55:31,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2024-11-19 09:55:31,604 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 31 predicate places. [2024-11-19 09:55:31,605 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 585 flow [2024-11-19 09:55:31,605 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) [2024-11-19 09:55:31,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:31,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:31,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:55:31,605 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:55:31,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:31,606 INFO L85 PathProgramCache]: Analyzing trace with hash 833539475, now seen corresponding path program 1 times [2024-11-19 09:55:31,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:31,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921059198] [2024-11-19 09:55:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:31,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:31,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921059198] [2024-11-19 09:55:31,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921059198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697504299] [2024-11-19 09:55:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:31,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:31,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:31,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:31,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:55:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:31,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:55:31,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:31,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:55:31,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:55:31,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:55:32,007 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:55:32,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:55:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:32,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:32,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:55:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:32,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697504299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:32,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:32,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:55:32,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194693410] [2024-11-19 09:55:32,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:32,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:55:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:55:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:55:32,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-19 09:55:32,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 585 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) [2024-11-19 09:55:32,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:32,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-19 09:55:32,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:33,649 INFO L124 PetriNetUnfolderBase]: 6547/10770 cut-off events. [2024-11-19 09:55:33,649 INFO L125 PetriNetUnfolderBase]: For 9178/10525 co-relation queries the response was YES. [2024-11-19 09:55:33,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27694 conditions, 10770 events. 6547/10770 cut-off events. For 9178/10525 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 75429 event pairs, 3556 based on Foata normal form. 342/9279 useless extension candidates. Maximal degree in co-relation 15679. Up to 6165 conditions per place. [2024-11-19 09:55:33,725 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 89 selfloop transitions, 27 changer transitions 0/126 dead transitions. [2024-11-19 09:55:33,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 951 flow [2024-11-19 09:55:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:55:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:55:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-11-19 09:55:33,727 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2024-11-19 09:55:33,727 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 585 flow. Second operand 8 states and 230 transitions. [2024-11-19 09:55:33,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 951 flow [2024-11-19 09:55:33,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 126 transitions, 915 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:33,742 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 618 flow [2024-11-19 09:55:33,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=618, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2024-11-19 09:55:33,743 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 36 predicate places. [2024-11-19 09:55:33,743 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 618 flow [2024-11-19 09:55:33,744 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) [2024-11-19 09:55:33,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:33,744 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:33,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:55:33,944 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 [2024-11-19 09:55:33,945 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:55:33,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:33,945 INFO L85 PathProgramCache]: Analyzing trace with hash 833539474, now seen corresponding path program 1 times [2024-11-19 09:55:33,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:33,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523573015] [2024-11-19 09:55:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:33,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:34,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523573015] [2024-11-19 09:55:34,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523573015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:34,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:34,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:55:34,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814475977] [2024-11-19 09:55:34,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:34,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:55:34,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:55:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:55:34,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-19 09:55:34,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 618 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) [2024-11-19 09:55:34,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:34,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-19 09:55:34,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:34,748 INFO L124 PetriNetUnfolderBase]: 4951/8472 cut-off events. [2024-11-19 09:55:34,748 INFO L125 PetriNetUnfolderBase]: For 16151/17117 co-relation queries the response was YES. [2024-11-19 09:55:34,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23886 conditions, 8472 events. 4951/8472 cut-off events. For 16151/17117 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 58949 event pairs, 3649 based on Foata normal form. 516/7743 useless extension candidates. Maximal degree in co-relation 13982. Up to 6724 conditions per place. [2024-11-19 09:55:34,780 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 60 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-11-19 09:55:34,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 768 flow [2024-11-19 09:55:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:55:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:55:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-19 09:55:34,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-19 09:55:34,781 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 618 flow. Second operand 5 states and 128 transitions. [2024-11-19 09:55:34,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 768 flow [2024-11-19 09:55:34,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 87 transitions, 727 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:55:34,790 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 607 flow [2024-11-19 09:55:34,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=607, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2024-11-19 09:55:34,791 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2024-11-19 09:55:34,791 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 607 flow [2024-11-19 09:55:34,791 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) [2024-11-19 09:55:34,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:34,791 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:34,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:55:34,791 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:55:34,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash 19190444, now seen corresponding path program 1 times [2024-11-19 09:55:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:34,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415166413] [2024-11-19 09:55:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:34,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:35,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:35,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415166413] [2024-11-19 09:55:35,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415166413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:35,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503446037] [2024-11-19 09:55:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:35,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:35,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:35,113 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:35,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:55:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:35,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-19 09:55:35,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:35,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:55:35,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:55:35,269 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:55:35,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:55:35,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:55:35,397 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-19 09:55:35,398 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 [2024-11-19 09:55:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:35,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:36,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503446037] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:36,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:55:36,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-19 09:55:36,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908565762] [2024-11-19 09:55:36,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:36,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:55:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:55:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:55:36,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-19 09:55:36,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 607 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) [2024-11-19 09:55:36,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:36,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-19 09:55:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:43,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:47,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:52,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:56,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:56:00,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:56:04,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:56:04,745 INFO L124 PetriNetUnfolderBase]: 6559/10080 cut-off events. [2024-11-19 09:56:04,745 INFO L125 PetriNetUnfolderBase]: For 14275/15976 co-relation queries the response was YES. [2024-11-19 09:56:04,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27681 conditions, 10080 events. 6559/10080 cut-off events. For 14275/15976 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 61242 event pairs, 2242 based on Foata normal form. 0/8250 useless extension candidates. Maximal degree in co-relation 15836. Up to 4500 conditions per place. [2024-11-19 09:56:04,813 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 88 selfloop transitions, 27 changer transitions 0/125 dead transitions. [2024-11-19 09:56:04,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 125 transitions, 1000 flow [2024-11-19 09:56:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-11-19 09:56:04,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-11-19 09:56:04,816 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 607 flow. Second operand 7 states and 228 transitions. [2024-11-19 09:56:04,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 125 transitions, 1000 flow [2024-11-19 09:56:04,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 125 transitions, 976 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:04,830 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 696 flow [2024-11-19 09:56:04,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2024-11-19 09:56:04,831 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 38 predicate places. [2024-11-19 09:56:04,831 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 696 flow [2024-11-19 09:56:04,831 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) [2024-11-19 09:56:04,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:04,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:04,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:56:05,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:05,032 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:56:05,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:05,033 INFO L85 PathProgramCache]: Analyzing trace with hash 19190446, now seen corresponding path program 1 times [2024-11-19 09:56:05,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:05,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058395984] [2024-11-19 09:56:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:05,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:05,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:05,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058395984] [2024-11-19 09:56:05,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058395984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398083433] [2024-11-19 09:56:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:05,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:05,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:05,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:56:05,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:56:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:05,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:56:05,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:05,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:56:05,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:56:05,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:56:05,375 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:56:05,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:56:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:05,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:05,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:56:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398083433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:05,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:05,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:56:05,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638605973] [2024-11-19 09:56:05,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:05,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:56:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:56:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:56:05,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-19 09:56:05,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 696 flow. Second operand has 13 states, 13 states have (on average 21.53846153846154) internal successors, (280), 13 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:05,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:05,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-19 09:56:05,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:06,940 INFO L124 PetriNetUnfolderBase]: 7378/11574 cut-off events. [2024-11-19 09:56:06,940 INFO L125 PetriNetUnfolderBase]: For 21237/23331 co-relation queries the response was YES. [2024-11-19 09:56:06,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36755 conditions, 11574 events. 7378/11574 cut-off events. For 21237/23331 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 74706 event pairs, 2524 based on Foata normal form. 0/10125 useless extension candidates. Maximal degree in co-relation 21140. Up to 4861 conditions per place. [2024-11-19 09:56:07,015 INFO L140 encePairwiseOnDemand]: 51/64 looper letters, 102 selfloop transitions, 30 changer transitions 0/142 dead transitions. [2024-11-19 09:56:07,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 142 transitions, 1182 flow [2024-11-19 09:56:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:56:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:56:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-11-19 09:56:07,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-11-19 09:56:07,016 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 696 flow. Second operand 9 states and 264 transitions. [2024-11-19 09:56:07,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 142 transitions, 1182 flow [2024-11-19 09:56:07,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 142 transitions, 1151 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:07,041 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 727 flow [2024-11-19 09:56:07,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=727, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2024-11-19 09:56:07,041 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 42 predicate places. [2024-11-19 09:56:07,042 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 727 flow [2024-11-19 09:56:07,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.53846153846154) internal successors, (280), 13 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:07,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:07,042 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:07,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:56:07,243 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 [2024-11-19 09:56:07,243 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:56:07,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:07,244 INFO L85 PathProgramCache]: Analyzing trace with hash 19190448, now seen corresponding path program 1 times [2024-11-19 09:56:07,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:07,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967083356] [2024-11-19 09:56:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:07,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:07,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967083356] [2024-11-19 09:56:07,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967083356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:07,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691363162] [2024-11-19 09:56:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:07,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:07,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:07,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:56:07,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:56:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:07,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 09:56:07,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:07,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:56:07,578 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:56:07,578 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 [2024-11-19 09:56:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:07,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:07,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691363162] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:07,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:56:07,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2024-11-19 09:56:07,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666145745] [2024-11-19 09:56:07,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:07,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:56:07,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:07,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:56:07,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:56:07,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-19 09:56:07,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 727 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) [2024-11-19 09:56:07,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:07,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-19 09:56:07,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:08,758 INFO L124 PetriNetUnfolderBase]: 6787/11017 cut-off events. [2024-11-19 09:56:08,758 INFO L125 PetriNetUnfolderBase]: For 22514/24113 co-relation queries the response was YES. [2024-11-19 09:56:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36328 conditions, 11017 events. 6787/11017 cut-off events. For 22514/24113 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 73679 event pairs, 3143 based on Foata normal form. 0/10147 useless extension candidates. Maximal degree in co-relation 20949. Up to 5952 conditions per place. [2024-11-19 09:56:08,828 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 96 selfloop transitions, 23 changer transitions 0/129 dead transitions. [2024-11-19 09:56:08,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 129 transitions, 1140 flow [2024-11-19 09:56:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-11-19 09:56:08,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5066964285714286 [2024-11-19 09:56:08,830 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 727 flow. Second operand 7 states and 227 transitions. [2024-11-19 09:56:08,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 129 transitions, 1140 flow [2024-11-19 09:56:08,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 129 transitions, 1079 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-19 09:56:08,859 INFO L231 Difference]: Finished difference. Result has 106 places, 94 transitions, 755 flow [2024-11-19 09:56:08,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=755, PETRI_PLACES=106, PETRI_TRANSITIONS=94} [2024-11-19 09:56:08,860 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 43 predicate places. [2024-11-19 09:56:08,860 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 94 transitions, 755 flow [2024-11-19 09:56:08,860 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) [2024-11-19 09:56:08,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:08,860 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:08,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:56:09,061 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 [2024-11-19 09:56:09,061 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:56:09,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2127428105, now seen corresponding path program 1 times [2024-11-19 09:56:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518022642] [2024-11-19 09:56:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:09,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:09,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518022642] [2024-11-19 09:56:09,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518022642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:09,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39860159] [2024-11-19 09:56:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:09,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:09,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:09,162 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:56:09,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:56:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:09,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:56:09,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:09,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:09,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39860159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:09,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:09,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:56:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092603242] [2024-11-19 09:56:09,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:09,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:56:09,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:56:09,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:56:09,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:56:09,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 94 transitions, 755 flow. Second operand has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:09,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:09,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:56:09,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:10,492 INFO L124 PetriNetUnfolderBase]: 7381/11272 cut-off events. [2024-11-19 09:56:10,492 INFO L125 PetriNetUnfolderBase]: For 29990/30441 co-relation queries the response was YES. [2024-11-19 09:56:10,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39452 conditions, 11272 events. 7381/11272 cut-off events. For 29990/30441 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 68853 event pairs, 3732 based on Foata normal form. 256/10578 useless extension candidates. Maximal degree in co-relation 22036. Up to 3613 conditions per place. [2024-11-19 09:56:10,562 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 126 selfloop transitions, 40 changer transitions 0/175 dead transitions. [2024-11-19 09:56:10,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 175 transitions, 1557 flow [2024-11-19 09:56:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:56:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:56:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 336 transitions. [2024-11-19 09:56:10,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-19 09:56:10,563 INFO L175 Difference]: Start difference. First operand has 106 places, 94 transitions, 755 flow. Second operand 10 states and 336 transitions. [2024-11-19 09:56:10,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 175 transitions, 1557 flow [2024-11-19 09:56:10,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 175 transitions, 1538 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:10,585 INFO L231 Difference]: Finished difference. Result has 114 places, 98 transitions, 882 flow [2024-11-19 09:56:10,585 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=882, PETRI_PLACES=114, PETRI_TRANSITIONS=98} [2024-11-19 09:56:10,586 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2024-11-19 09:56:10,586 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 98 transitions, 882 flow [2024-11-19 09:56:10,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:10,586 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:10,586 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:10,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:56:10,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:10,787 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:56:10,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:10,787 INFO L85 PathProgramCache]: Analyzing trace with hash 472648047, now seen corresponding path program 1 times [2024-11-19 09:56:10,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:10,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840308650] [2024-11-19 09:56:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:10,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:10,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840308650] [2024-11-19 09:56:10,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840308650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902324688] [2024-11-19 09:56:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:10,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:10,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:10,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:56:10,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:56:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:10,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:56:10,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:11,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:11,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902324688] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:11,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:11,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:56:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840714746] [2024-11-19 09:56:11,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:11,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:56:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:56:11,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:56:11,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:56:11,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 98 transitions, 882 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:11,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:11,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:56:11,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:12,032 INFO L124 PetriNetUnfolderBase]: 5333/8106 cut-off events. [2024-11-19 09:56:12,032 INFO L125 PetriNetUnfolderBase]: For 32401/33805 co-relation queries the response was YES. [2024-11-19 09:56:12,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31332 conditions, 8106 events. 5333/8106 cut-off events. For 32401/33805 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 44818 event pairs, 2737 based on Foata normal form. 152/7722 useless extension candidates. Maximal degree in co-relation 19008. Up to 3383 conditions per place. [2024-11-19 09:56:12,092 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 105 selfloop transitions, 42 changer transitions 0/156 dead transitions. [2024-11-19 09:56:12,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 156 transitions, 1502 flow [2024-11-19 09:56:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:56:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:56:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 325 transitions. [2024-11-19 09:56:12,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-11-19 09:56:12,094 INFO L175 Difference]: Start difference. First operand has 114 places, 98 transitions, 882 flow. Second operand 10 states and 325 transitions. [2024-11-19 09:56:12,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 156 transitions, 1502 flow [2024-11-19 09:56:12,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 156 transitions, 1433 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-19 09:56:12,135 INFO L231 Difference]: Finished difference. Result has 120 places, 102 transitions, 984 flow [2024-11-19 09:56:12,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=984, PETRI_PLACES=120, PETRI_TRANSITIONS=102} [2024-11-19 09:56:12,136 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 57 predicate places. [2024-11-19 09:56:12,136 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 102 transitions, 984 flow [2024-11-19 09:56:12,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:12,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:12,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:12,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 09:56:12,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:12,337 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:56:12,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1004352099, now seen corresponding path program 1 times [2024-11-19 09:56:12,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:12,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432082706] [2024-11-19 09:56:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:12,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:12,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432082706] [2024-11-19 09:56:12,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432082706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:12,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037607142] [2024-11-19 09:56:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:12,519 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:56:12,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:56:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:12,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 09:56:12,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:12,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:56:12,703 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:56:12,704 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 [2024-11-19 09:56:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:12,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:56:12,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037607142] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:12,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:56:12,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2024-11-19 09:56:12,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901700095] [2024-11-19 09:56:12,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:12,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:56:12,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:56:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:56:12,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-19 09:56:12,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 102 transitions, 984 flow. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:12,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:12,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-19 09:56:12,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:13,789 INFO L124 PetriNetUnfolderBase]: 5572/9514 cut-off events. [2024-11-19 09:56:13,790 INFO L125 PetriNetUnfolderBase]: For 49101/50374 co-relation queries the response was YES. [2024-11-19 09:56:13,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36025 conditions, 9514 events. 5572/9514 cut-off events. For 49101/50374 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 64183 event pairs, 2405 based on Foata normal form. 0/8779 useless extension candidates. Maximal degree in co-relation 22104. Up to 4164 conditions per place. [2024-11-19 09:56:13,869 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 128 selfloop transitions, 18 changer transitions 0/156 dead transitions. [2024-11-19 09:56:13,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 156 transitions, 1712 flow [2024-11-19 09:56:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-11-19 09:56:13,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2024-11-19 09:56:13,870 INFO L175 Difference]: Start difference. First operand has 120 places, 102 transitions, 984 flow. Second operand 7 states and 230 transitions. [2024-11-19 09:56:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 156 transitions, 1712 flow [2024-11-19 09:56:13,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 156 transitions, 1654 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-19 09:56:13,908 INFO L231 Difference]: Finished difference. Result has 123 places, 104 transitions, 999 flow [2024-11-19 09:56:13,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=999, PETRI_PLACES=123, PETRI_TRANSITIONS=104} [2024-11-19 09:56:13,909 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 60 predicate places. [2024-11-19 09:56:13,909 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 104 transitions, 999 flow [2024-11-19 09:56:13,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:13,909 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:13,909 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:13,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 09:56:14,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:56:14,110 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:56:14,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:14,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1172653744, now seen corresponding path program 1 times [2024-11-19 09:56:14,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:14,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845772619] [2024-11-19 09:56:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:14,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:14,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845772619] [2024-11-19 09:56:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845772619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:14,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:14,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:56:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672862441] [2024-11-19 09:56:14,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:14,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:56:14,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:56:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:56:14,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-19 09:56:14,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 104 transitions, 999 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:14,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:14,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-19 09:56:14,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand