./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-subst.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/chl-word-subst.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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:46:11,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:46:11,218 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:46:11,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:46:11,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:46:11,259 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:46:11,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:46:11,261 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:46:11,262 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:46:11,263 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:46:11,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:46:11,264 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:46:11,265 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:46:11,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:46:11,265 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:46:11,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:46:11,266 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:46:11,270 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:46:11,270 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:46:11,270 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:46:11,270 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:46:11,271 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:46:11,271 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:46:11,271 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:46:11,272 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:46:11,272 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:46:11,272 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:46:11,272 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:46:11,272 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:46:11,272 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:46:11,273 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:46:11,273 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:46:11,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:46:11,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:46:11,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:46:11,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:46:11,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:46:11,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:46:11,276 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:46:11,276 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:46:11,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:46:11,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:46:11,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2024-11-19 09:46:11,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:46:11,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:46:11,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:46:11,588 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:46:11,588 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:46:11,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-19 09:46:12,991 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:46:13,213 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:46:13,214 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-19 09:46:13,223 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24f348198/c2159ec967934dd4ad405092cef2c01e/FLAG8fe8bab92 [2024-11-19 09:46:13,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24f348198/c2159ec967934dd4ad405092cef2c01e [2024-11-19 09:46:13,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:46:13,247 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:46:13,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:46:13,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:46:13,256 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:46:13,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230c86b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13, skipping insertion in model container [2024-11-19 09:46:13,260 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,291 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:46:13,536 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 09:46:13,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:46:13,555 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:46:13,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:46:13,613 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:46:13,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13 WrapperNode [2024-11-19 09:46:13,613 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:46:13,615 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:46:13,615 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:46:13,615 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:46:13,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,630 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,654 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 171 [2024-11-19 09:46:13,655 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:46:13,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:46:13,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:46:13,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:46:13,672 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,676 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,695 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-19 09:46:13,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,696 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,711 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,713 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:46:13,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:46:13,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:46:13,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:46:13,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (1/1) ... [2024-11-19 09:46:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:46:13,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:13,761 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 09:46:13,764 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 09:46:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:46:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:46:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:46:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:46:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:46:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:46:13,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:46:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:46:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:46:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:46:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:46:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:46:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:46:13,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:46:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:46:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:46:13,844 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 09:46:13,977 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:46:13,979 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:46:14,502 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:46:14,502 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:46:14,803 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:46:14,804 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-19 09:46:14,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:46:14 BoogieIcfgContainer [2024-11-19 09:46:14,805 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:46:14,807 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:46:14,808 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:46:14,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:46:14,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:46:13" (1/3) ... [2024-11-19 09:46:14,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3343eeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:46:14, skipping insertion in model container [2024-11-19 09:46:14,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:46:13" (2/3) ... [2024-11-19 09:46:14,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3343eeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:46:14, skipping insertion in model container [2024-11-19 09:46:14,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:46:14" (3/3) ... [2024-11-19 09:46:14,832 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2024-11-19 09:46:14,850 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:46:14,850 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-19 09:46:14,850 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:46:14,951 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:46:14,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 96 transitions, 213 flow [2024-11-19 09:46:15,039 INFO L124 PetriNetUnfolderBase]: 12/93 cut-off events. [2024-11-19 09:46:15,040 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:46:15,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 12/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 327 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-11-19 09:46:15,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 96 transitions, 213 flow [2024-11-19 09:46:15,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 92 transitions, 202 flow [2024-11-19 09:46:15,063 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:46:15,071 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;@2fc9ccd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:46:15,072 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-19 09:46:15,076 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:46:15,076 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:46:15,077 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:46:15,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:15,078 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:46:15,078 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:15,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 791289, now seen corresponding path program 1 times [2024-11-19 09:46:15,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:15,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953151946] [2024-11-19 09:46:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:15,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:15,362 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 09:46:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953151946] [2024-11-19 09:46:15,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953151946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:15,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:15,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:46:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664645379] [2024-11-19 09:46:15,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:15,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:46:15,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:15,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:46:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:46:15,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-19 09:46:15,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:15,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:15,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-19 09:46:15,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:16,116 INFO L124 PetriNetUnfolderBase]: 2712/4947 cut-off events. [2024-11-19 09:46:16,116 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-11-19 09:46:16,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 4947 events. 2712/4947 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34539 event pairs, 1692 based on Foata normal form. 1/3396 useless extension candidates. Maximal degree in co-relation 8222. Up to 3567 conditions per place. [2024-11-19 09:46:16,166 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 45 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-19 09:46:16,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 286 flow [2024-11-19 09:46:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:46:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:46:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-19 09:46:16,182 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-11-19 09:46:16,184 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-11-19 09:46:16,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 286 flow [2024-11-19 09:46:16,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 274 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:46:16,198 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 184 flow [2024-11-19 09:46:16,201 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-11-19 09:46:16,206 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-11-19 09:46:16,207 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 184 flow [2024-11-19 09:46:16,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:16,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:16,207 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:46:16,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:46:16,208 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:16,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash 791290, now seen corresponding path program 1 times [2024-11-19 09:46:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:16,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166517139] [2024-11-19 09:46:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:16,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:16,538 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 09:46:16,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:16,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166517139] [2024-11-19 09:46:16,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166517139] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:16,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:16,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:46:16,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521269634] [2024-11-19 09:46:16,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:16,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:46:16,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:46:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:46:16,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-19 09:46:16,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 09:46:16,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:16,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-19 09:46:16,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:17,272 INFO L124 PetriNetUnfolderBase]: 2713/4950 cut-off events. [2024-11-19 09:46:17,273 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-19 09:46:17,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8593 conditions, 4950 events. 2713/4950 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34569 event pairs, 1692 based on Foata normal form. 0/3395 useless extension candidates. Maximal degree in co-relation 8556. Up to 3580 conditions per place. [2024-11-19 09:46:17,314 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 49 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2024-11-19 09:46:17,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 296 flow [2024-11-19 09:46:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:46:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:46:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-11-19 09:46:17,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2024-11-19 09:46:17,317 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 184 flow. Second operand 4 states and 230 transitions. [2024-11-19 09:46:17,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 296 flow [2024-11-19 09:46:17,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:17,321 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 207 flow [2024-11-19 09:46:17,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-11-19 09:46:17,323 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2024-11-19 09:46:17,323 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 207 flow [2024-11-19 09:46:17,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 09:46:17,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:17,324 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:46:17,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:46:17,325 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:17,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash 24530088, now seen corresponding path program 1 times [2024-11-19 09:46:17,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:17,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695564142] [2024-11-19 09:46:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:17,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:17,517 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 09:46:17,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:17,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695564142] [2024-11-19 09:46:17,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695564142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:17,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:17,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:17,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077316483] [2024-11-19 09:46:17,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:17,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:17,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:17,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:17,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-19 09:46:17,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 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 09:46:17,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:17,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-19 09:46:17,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:18,193 INFO L124 PetriNetUnfolderBase]: 2714/4953 cut-off events. [2024-11-19 09:46:18,193 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-19 09:46:18,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8610 conditions, 4953 events. 2714/4953 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34555 event pairs, 1692 based on Foata normal form. 0/3397 useless extension candidates. Maximal degree in co-relation 8585. Up to 3579 conditions per place. [2024-11-19 09:46:18,228 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 49 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2024-11-19 09:46:18,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 325 flow [2024-11-19 09:46:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-19 09:46:18,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-11-19 09:46:18,231 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 207 flow. Second operand 5 states and 277 transitions. [2024-11-19 09:46:18,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 325 flow [2024-11-19 09:46:18,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:18,233 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 241 flow [2024-11-19 09:46:18,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-11-19 09:46:18,234 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -1 predicate places. [2024-11-19 09:46:18,234 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 241 flow [2024-11-19 09:46:18,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 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 09:46:18,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:18,235 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:46:18,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:46:18,235 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:18,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash 760433302, now seen corresponding path program 1 times [2024-11-19 09:46:18,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:18,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046943121] [2024-11-19 09:46:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:18,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:18,439 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 09:46:18,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:18,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046943121] [2024-11-19 09:46:18,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046943121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:18,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:18,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:18,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851838673] [2024-11-19 09:46:18,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:18,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:18,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:18,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:18,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-19 09:46:18,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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 09:46:18,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:18,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-19 09:46:18,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:19,236 INFO L124 PetriNetUnfolderBase]: 2715/4956 cut-off events. [2024-11-19 09:46:19,237 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-19 09:46:19,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8632 conditions, 4956 events. 2715/4956 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34602 event pairs, 1692 based on Foata normal form. 0/3401 useless extension candidates. Maximal degree in co-relation 8601. Up to 3582 conditions per place. [2024-11-19 09:46:19,276 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 50 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2024-11-19 09:46:19,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 365 flow [2024-11-19 09:46:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-19 09:46:19,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-11-19 09:46:19,280 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 241 flow. Second operand 5 states and 277 transitions. [2024-11-19 09:46:19,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 365 flow [2024-11-19 09:46:19,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:19,285 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 283 flow [2024-11-19 09:46:19,285 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2024-11-19 09:46:19,286 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-11-19 09:46:19,286 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 283 flow [2024-11-19 09:46:19,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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 09:46:19,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:19,287 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:46:19,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:46:19,289 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:19,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash 760455063, now seen corresponding path program 1 times [2024-11-19 09:46:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:19,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930506642] [2024-11-19 09:46:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:19,533 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 09:46:19,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930506642] [2024-11-19 09:46:19,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930506642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:19,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150793391] [2024-11-19 09:46:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:19,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:19,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:19,537 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 09:46:19,539 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 09:46:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:19,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:46:19,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:19,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:46:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:19,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:20,065 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 09:46:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150793391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:20,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:20,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:46:20,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388673313] [2024-11-19 09:46:20,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:20,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:46:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:46:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:46:20,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-19 09:46:20,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 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 09:46:20,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:20,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-19 09:46:20,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:21,377 INFO L124 PetriNetUnfolderBase]: 2715/4955 cut-off events. [2024-11-19 09:46:21,378 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-19 09:46:21,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8650 conditions, 4955 events. 2715/4955 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34587 event pairs, 1692 based on Foata normal form. 0/3403 useless extension candidates. Maximal degree in co-relation 8616. Up to 3582 conditions per place. [2024-11-19 09:46:21,409 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 51 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-19 09:46:21,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 395 flow [2024-11-19 09:46:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:46:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:46:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2024-11-19 09:46:21,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5503472222222222 [2024-11-19 09:46:21,411 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 283 flow. Second operand 6 states and 317 transitions. [2024-11-19 09:46:21,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 395 flow [2024-11-19 09:46:21,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:21,415 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 286 flow [2024-11-19 09:46:21,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2024-11-19 09:46:21,419 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2024-11-19 09:46:21,422 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 286 flow [2024-11-19 09:46:21,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 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 09:46:21,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:21,423 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:46:21,442 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 09:46:21,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:21,624 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:21,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2098602676, now seen corresponding path program 1 times [2024-11-19 09:46:21,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:21,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837468904] [2024-11-19 09:46:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:21,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:21,809 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 09:46:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837468904] [2024-11-19 09:46:21,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837468904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:21,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707252617] [2024-11-19 09:46:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:21,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:21,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:21,812 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 09:46:21,814 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 09:46:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:21,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:46:21,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:21,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:46:22,054 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 09:46:22,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:22,208 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 09:46:22,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707252617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:22,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:22,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:46:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908507441] [2024-11-19 09:46:22,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:22,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:46:22,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:46:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:46:23,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-19 09:46:23,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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 09:46:23,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:23,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-19 09:46:23,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:24,023 INFO L124 PetriNetUnfolderBase]: 2717/4960 cut-off events. [2024-11-19 09:46:24,023 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-19 09:46:24,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8673 conditions, 4960 events. 2717/4960 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34635 event pairs, 1692 based on Foata normal form. 0/3409 useless extension candidates. Maximal degree in co-relation 8622. Up to 3575 conditions per place. [2024-11-19 09:46:24,064 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 45 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-11-19 09:46:24,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 443 flow [2024-11-19 09:46:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:46:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:46:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 458 transitions. [2024-11-19 09:46:24,067 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-11-19 09:46:24,067 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 286 flow. Second operand 9 states and 458 transitions. [2024-11-19 09:46:24,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 443 flow [2024-11-19 09:46:24,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 396 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-19 09:46:24,071 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 306 flow [2024-11-19 09:46:24,071 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-11-19 09:46:24,072 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-19 09:46:24,072 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 306 flow [2024-11-19 09:46:24,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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 09:46:24,073 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:24,073 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-19 09:46:24,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:46:24,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-19 09:46:24,278 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:24,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:24,279 INFO L85 PathProgramCache]: Analyzing trace with hash 631987656, now seen corresponding path program 1 times [2024-11-19 09:46:24,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:24,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060458891] [2024-11-19 09:46:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:24,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:24,595 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 09:46:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:24,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060458891] [2024-11-19 09:46:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060458891] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718079673] [2024-11-19 09:46:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:24,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:24,598 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 09:46:24,600 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 09:46:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:24,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:46:24,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:24,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:46:24,883 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 09:46:24,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:25,040 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 09:46:25,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718079673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:25,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:25,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:46:25,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942461590] [2024-11-19 09:46:25,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:25,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:46:25,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:25,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:46:25,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:46:26,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-19 09:46:26,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 306 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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 09:46:26,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:26,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-19 09:46:26,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:26,831 INFO L124 PetriNetUnfolderBase]: 2718/4962 cut-off events. [2024-11-19 09:46:26,832 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-19 09:46:26,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8671 conditions, 4962 events. 2718/4962 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34638 event pairs, 1692 based on Foata normal form. 0/3411 useless extension candidates. Maximal degree in co-relation 8607. Up to 3577 conditions per place. [2024-11-19 09:46:26,880 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 43 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-11-19 09:46:26,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 444 flow [2024-11-19 09:46:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:46:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:46:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-11-19 09:46:26,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5289351851851852 [2024-11-19 09:46:26,883 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 306 flow. Second operand 9 states and 457 transitions. [2024-11-19 09:46:26,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 444 flow [2024-11-19 09:46:26,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 411 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-19 09:46:26,888 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 325 flow [2024-11-19 09:46:26,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-11-19 09:46:26,889 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 7 predicate places. [2024-11-19 09:46:26,889 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 325 flow [2024-11-19 09:46:26,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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 09:46:26,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:26,890 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:26,909 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 09:46:27,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:27,092 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:27,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:27,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1895181944, now seen corresponding path program 1 times [2024-11-19 09:46:27,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:27,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274960505] [2024-11-19 09:46:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:27,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:27,187 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 09:46:27,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:27,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274960505] [2024-11-19 09:46:27,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274960505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:27,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:27,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:46:27,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126513899] [2024-11-19 09:46:27,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:27,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:27,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:27,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:27,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:27,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-19 09:46:27,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:27,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:27,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-19 09:46:27,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:27,931 INFO L124 PetriNetUnfolderBase]: 5204/9287 cut-off events. [2024-11-19 09:46:27,932 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-19 09:46:27,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16446 conditions, 9287 events. 5204/9287 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 69657 event pairs, 2894 based on Foata normal form. 0/6441 useless extension candidates. Maximal degree in co-relation 9724. Up to 4040 conditions per place. [2024-11-19 09:46:28,002 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 131 selfloop transitions, 10 changer transitions 0/177 dead transitions. [2024-11-19 09:46:28,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 177 transitions, 833 flow [2024-11-19 09:46:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:46:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:46:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 397 transitions. [2024-11-19 09:46:28,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6892361111111112 [2024-11-19 09:46:28,005 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 325 flow. Second operand 6 states and 397 transitions. [2024-11-19 09:46:28,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 177 transitions, 833 flow [2024-11-19 09:46:28,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 177 transitions, 755 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-19 09:46:28,009 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 355 flow [2024-11-19 09:46:28,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2024-11-19 09:46:28,012 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 9 predicate places. [2024-11-19 09:46:28,013 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 355 flow [2024-11-19 09:46:28,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:28,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:28,014 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:28,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:46:28,014 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:28,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1500049067, now seen corresponding path program 1 times [2024-11-19 09:46:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:28,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967533522] [2024-11-19 09:46:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:28,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:28,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:28,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967533522] [2024-11-19 09:46:28,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967533522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:28,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:28,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:46:28,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743101104] [2024-11-19 09:46:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:28,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:28,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:28,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:28,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:28,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-19 09:46:28,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:28,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:28,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-19 09:46:28,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:29,183 INFO L124 PetriNetUnfolderBase]: 9500/17358 cut-off events. [2024-11-19 09:46:29,184 INFO L125 PetriNetUnfolderBase]: For 1723/1723 co-relation queries the response was YES. [2024-11-19 09:46:29,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31888 conditions, 17358 events. 9500/17358 cut-off events. For 1723/1723 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 146263 event pairs, 5298 based on Foata normal form. 114/12673 useless extension candidates. Maximal degree in co-relation 22620. Up to 6942 conditions per place. [2024-11-19 09:46:29,301 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 129 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2024-11-19 09:46:29,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 831 flow [2024-11-19 09:46:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:46:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:46:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 391 transitions. [2024-11-19 09:46:29,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6788194444444444 [2024-11-19 09:46:29,304 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 355 flow. Second operand 6 states and 391 transitions. [2024-11-19 09:46:29,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 831 flow [2024-11-19 09:46:29,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 179 transitions, 826 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:29,313 INFO L231 Difference]: Finished difference. Result has 105 places, 117 transitions, 459 flow [2024-11-19 09:46:29,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=105, PETRI_TRANSITIONS=117} [2024-11-19 09:46:29,315 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 15 predicate places. [2024-11-19 09:46:29,315 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 117 transitions, 459 flow [2024-11-19 09:46:29,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:29,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:29,316 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:29,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:46:29,316 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:29,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:29,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1141308600, now seen corresponding path program 1 times [2024-11-19 09:46:29,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:29,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921387261] [2024-11-19 09:46:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:29,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:29,390 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 09:46:29,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:29,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921387261] [2024-11-19 09:46:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921387261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:29,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:29,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:46:29,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135167703] [2024-11-19 09:46:29,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:29,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:29,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-19 09:46:29,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 117 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:29,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:29,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-19 09:46:29,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:30,289 INFO L124 PetriNetUnfolderBase]: 8828/16125 cut-off events. [2024-11-19 09:46:30,290 INFO L125 PetriNetUnfolderBase]: For 5616/5616 co-relation queries the response was YES. [2024-11-19 09:46:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31100 conditions, 16125 events. 8828/16125 cut-off events. For 5616/5616 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 133281 event pairs, 5194 based on Foata normal form. 0/11710 useless extension candidates. Maximal degree in co-relation 23027. Up to 7333 conditions per place. [2024-11-19 09:46:30,393 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 132 selfloop transitions, 12 changer transitions 0/180 dead transitions. [2024-11-19 09:46:30,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 180 transitions, 937 flow [2024-11-19 09:46:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:46:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:46:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2024-11-19 09:46:30,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-19 09:46:30,395 INFO L175 Difference]: Start difference. First operand has 105 places, 117 transitions, 459 flow. Second operand 6 states and 390 transitions. [2024-11-19 09:46:30,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 180 transitions, 937 flow [2024-11-19 09:46:30,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:30,404 INFO L231 Difference]: Finished difference. Result has 111 places, 119 transitions, 499 flow [2024-11-19 09:46:30,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=111, PETRI_TRANSITIONS=119} [2024-11-19 09:46:30,405 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 21 predicate places. [2024-11-19 09:46:30,405 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 119 transitions, 499 flow [2024-11-19 09:46:30,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:30,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:30,406 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:30,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:46:30,406 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:30,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash -393930269, now seen corresponding path program 1 times [2024-11-19 09:46:30,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:30,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333721501] [2024-11-19 09:46:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:30,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:30,478 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 09:46:30,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:30,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333721501] [2024-11-19 09:46:30,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333721501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:30,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:30,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:46:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854568863] [2024-11-19 09:46:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:30,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:30,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:30,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-19 09:46:30,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 119 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:30,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:30,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-19 09:46:30,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:31,253 INFO L124 PetriNetUnfolderBase]: 7930/14288 cut-off events. [2024-11-19 09:46:31,253 INFO L125 PetriNetUnfolderBase]: For 6615/6615 co-relation queries the response was YES. [2024-11-19 09:46:31,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29344 conditions, 14288 events. 7930/14288 cut-off events. For 6615/6615 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 112435 event pairs, 4896 based on Foata normal form. 0/10878 useless extension candidates. Maximal degree in co-relation 21567. Up to 6606 conditions per place. [2024-11-19 09:46:31,332 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 131 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2024-11-19 09:46:31,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 179 transitions, 977 flow [2024-11-19 09:46:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:46:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:46:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 383 transitions. [2024-11-19 09:46:31,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6649305555555556 [2024-11-19 09:46:31,334 INFO L175 Difference]: Start difference. First operand has 111 places, 119 transitions, 499 flow. Second operand 6 states and 383 transitions. [2024-11-19 09:46:31,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 179 transitions, 977 flow [2024-11-19 09:46:31,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 179 transitions, 964 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:46:31,347 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 528 flow [2024-11-19 09:46:31,348 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2024-11-19 09:46:31,349 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2024-11-19 09:46:31,349 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 528 flow [2024-11-19 09:46:31,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:31,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:31,349 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:31,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:46:31,350 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:31,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash -214311031, now seen corresponding path program 1 times [2024-11-19 09:46:31,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:31,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445841807] [2024-11-19 09:46:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445841807] [2024-11-19 09:46:31,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445841807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:31,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964341829] [2024-11-19 09:46:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:31,681 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 09:46:31,683 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 09:46:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:31,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:46:31,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:31,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:46:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:46:31,838 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 09:46:31,864 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:46:31,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:46:31,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:46:31,905 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 09:46:31,916 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:46:31,916 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 09:46:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:31,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:32,203 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 162 treesize of output 156 [2024-11-19 09:46:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:32,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964341829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:32,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:32,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-19 09:46:32,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457779629] [2024-11-19 09:46:32,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:32,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:46:32,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:46:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:46:38,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-19 09:46:38,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 528 flow. Second operand has 16 states, 16 states have (on average 33.0625) internal successors, (529), 16 states have internal predecessors, (529), 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 09:46:38,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:38,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-19 09:46:38,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:40,008 INFO L124 PetriNetUnfolderBase]: 15810/25408 cut-off events. [2024-11-19 09:46:40,008 INFO L125 PetriNetUnfolderBase]: For 9124/9124 co-relation queries the response was YES. [2024-11-19 09:46:40,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54942 conditions, 25408 events. 15810/25408 cut-off events. For 9124/9124 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 183980 event pairs, 6452 based on Foata normal form. 0/20964 useless extension candidates. Maximal degree in co-relation 36791. Up to 8004 conditions per place. [2024-11-19 09:46:40,188 INFO L140 encePairwiseOnDemand]: 79/96 looper letters, 170 selfloop transitions, 30 changer transitions 0/224 dead transitions. [2024-11-19 09:46:40,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 224 transitions, 1218 flow [2024-11-19 09:46:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:46:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:46:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 463 transitions. [2024-11-19 09:46:40,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5358796296296297 [2024-11-19 09:46:40,190 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 528 flow. Second operand 9 states and 463 transitions. [2024-11-19 09:46:40,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 224 transitions, 1218 flow [2024-11-19 09:46:40,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 224 transitions, 1200 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:46:40,430 INFO L231 Difference]: Finished difference. Result has 117 places, 122 transitions, 607 flow [2024-11-19 09:46:40,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=117, PETRI_TRANSITIONS=122} [2024-11-19 09:46:40,431 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 27 predicate places. [2024-11-19 09:46:40,431 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 122 transitions, 607 flow [2024-11-19 09:46:40,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.0625) internal successors, (529), 16 states have internal predecessors, (529), 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 09:46:40,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:40,431 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:40,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:46:40,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:40,635 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:40,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:40,636 INFO L85 PathProgramCache]: Analyzing trace with hash 216834790, now seen corresponding path program 1 times [2024-11-19 09:46:40,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:40,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882995994] [2024-11-19 09:46:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:40,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882995994] [2024-11-19 09:46:40,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882995994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:40,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:40,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:46:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333629591] [2024-11-19 09:46:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:40,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:40,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-19 09:46:40,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 607 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:40,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:40,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-19 09:46:40,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:42,610 INFO L124 PetriNetUnfolderBase]: 17406/31568 cut-off events. [2024-11-19 09:46:42,610 INFO L125 PetriNetUnfolderBase]: For 25060/25106 co-relation queries the response was YES. [2024-11-19 09:46:42,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70674 conditions, 31568 events. 17406/31568 cut-off events. For 25060/25106 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 272744 event pairs, 10416 based on Foata normal form. 273/26295 useless extension candidates. Maximal degree in co-relation 50832. Up to 13223 conditions per place. [2024-11-19 09:46:42,807 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 153 selfloop transitions, 17 changer transitions 0/202 dead transitions. [2024-11-19 09:46:42,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 202 transitions, 1319 flow [2024-11-19 09:46:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2024-11-19 09:46:42,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-11-19 09:46:42,809 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 607 flow. Second operand 5 states and 338 transitions. [2024-11-19 09:46:42,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 202 transitions, 1319 flow [2024-11-19 09:46:42,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 202 transitions, 1240 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-11-19 09:46:42,844 INFO L231 Difference]: Finished difference. Result has 119 places, 126 transitions, 628 flow [2024-11-19 09:46:42,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=628, PETRI_PLACES=119, PETRI_TRANSITIONS=126} [2024-11-19 09:46:42,845 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 29 predicate places. [2024-11-19 09:46:42,845 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 126 transitions, 628 flow [2024-11-19 09:46:42,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:42,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:42,845 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:42,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:46:42,846 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:42,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1946293397, now seen corresponding path program 1 times [2024-11-19 09:46:42,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:42,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502938545] [2024-11-19 09:46:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:42,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:42,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502938545] [2024-11-19 09:46:42,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502938545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:42,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:42,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:42,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836501180] [2024-11-19 09:46:42,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:42,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:46:42,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:42,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:46:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:46:42,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-19 09:46:42,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 126 transitions, 628 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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 09:46:42,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:42,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-19 09:46:42,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:45,401 INFO L124 PetriNetUnfolderBase]: 20661/35140 cut-off events. [2024-11-19 09:46:45,401 INFO L125 PetriNetUnfolderBase]: For 30262/30262 co-relation queries the response was YES. [2024-11-19 09:46:45,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82839 conditions, 35140 events. 20661/35140 cut-off events. For 30262/30262 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 283613 event pairs, 14989 based on Foata normal form. 0/31790 useless extension candidates. Maximal degree in co-relation 60372. Up to 28154 conditions per place. [2024-11-19 09:46:45,655 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 82 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2024-11-19 09:46:45,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 122 transitions, 812 flow [2024-11-19 09:46:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-11-19 09:46:45,656 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2024-11-19 09:46:45,657 INFO L175 Difference]: Start difference. First operand has 119 places, 126 transitions, 628 flow. Second operand 5 states and 239 transitions. [2024-11-19 09:46:45,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 122 transitions, 812 flow [2024-11-19 09:46:45,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 803 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:45,882 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 639 flow [2024-11-19 09:46:45,882 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=639, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-11-19 09:46:45,883 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 28 predicate places. [2024-11-19 09:46:45,883 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 639 flow [2024-11-19 09:46:45,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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 09:46:45,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:45,883 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:45,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:46:45,884 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:45,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1946293398, now seen corresponding path program 1 times [2024-11-19 09:46:45,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:45,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607110613] [2024-11-19 09:46:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:46,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:46,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607110613] [2024-11-19 09:46:46,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607110613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:46,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699687508] [2024-11-19 09:46:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:46,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:46,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:46,069 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 09:46:46,070 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 09:46:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:46,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:46:46,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:46,170 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 09:46:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:46:46,215 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 09:46:46,222 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:46:46,222 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 09:46:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:46,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:46,352 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 09:46:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:46,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699687508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:46,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:46,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:46:46,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121489971] [2024-11-19 09:46:46,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:46,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:46:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:46:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:46:47,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2024-11-19 09:46:47,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 639 flow. Second operand has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 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 09:46:47,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:47,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2024-11-19 09:46:47,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:49,611 INFO L124 PetriNetUnfolderBase]: 18422/29799 cut-off events. [2024-11-19 09:46:49,611 INFO L125 PetriNetUnfolderBase]: For 25704/25704 co-relation queries the response was YES. [2024-11-19 09:46:49,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72019 conditions, 29799 events. 18422/29799 cut-off events. For 25704/25704 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 221047 event pairs, 9181 based on Foata normal form. 0/26527 useless extension candidates. Maximal degree in co-relation 52479. Up to 9820 conditions per place. [2024-11-19 09:46:49,782 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 161 selfloop transitions, 34 changer transitions 0/221 dead transitions. [2024-11-19 09:46:49,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 221 transitions, 1391 flow [2024-11-19 09:46:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:46:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:46:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2024-11-19 09:46:49,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-11-19 09:46:49,784 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 639 flow. Second operand 9 states and 520 transitions. [2024-11-19 09:46:49,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 221 transitions, 1391 flow [2024-11-19 09:46:49,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 221 transitions, 1367 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:46:49,847 INFO L231 Difference]: Finished difference. Result has 124 places, 126 transitions, 734 flow [2024-11-19 09:46:49,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=734, PETRI_PLACES=124, PETRI_TRANSITIONS=126} [2024-11-19 09:46:49,847 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 34 predicate places. [2024-11-19 09:46:49,848 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 126 transitions, 734 flow [2024-11-19 09:46:49,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 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 09:46:49,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:49,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:49,860 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 09:46:50,048 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,SelfDestructingSolverStorable14 [2024-11-19 09:46:50,049 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:50,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -406367912, now seen corresponding path program 1 times [2024-11-19 09:46:50,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:50,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052790388] [2024-11-19 09:46:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:50,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052790388] [2024-11-19 09:46:50,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052790388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:50,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:50,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:46:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698483021] [2024-11-19 09:46:50,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:50,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:50,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:50,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:50,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-19 09:46:50,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 126 transitions, 734 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 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 09:46:50,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:50,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-19 09:46:50,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:52,044 INFO L124 PetriNetUnfolderBase]: 16312/26593 cut-off events. [2024-11-19 09:46:52,044 INFO L125 PetriNetUnfolderBase]: For 35922/35964 co-relation queries the response was YES. [2024-11-19 09:46:52,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68305 conditions, 26593 events. 16312/26593 cut-off events. For 35922/35964 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 193014 event pairs, 10256 based on Foata normal form. 218/24064 useless extension candidates. Maximal degree in co-relation 50457. Up to 13117 conditions per place. [2024-11-19 09:46:52,231 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 150 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2024-11-19 09:46:52,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 195 transitions, 1450 flow [2024-11-19 09:46:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-19 09:46:52,232 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6895833333333333 [2024-11-19 09:46:52,232 INFO L175 Difference]: Start difference. First operand has 124 places, 126 transitions, 734 flow. Second operand 5 states and 331 transitions. [2024-11-19 09:46:52,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 195 transitions, 1450 flow [2024-11-19 09:46:52,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 195 transitions, 1372 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-19 09:46:52,277 INFO L231 Difference]: Finished difference. Result has 124 places, 130 transitions, 752 flow [2024-11-19 09:46:52,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=752, PETRI_PLACES=124, PETRI_TRANSITIONS=130} [2024-11-19 09:46:52,278 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 34 predicate places. [2024-11-19 09:46:52,278 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 130 transitions, 752 flow [2024-11-19 09:46:52,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 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 09:46:52,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:52,278 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:52,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 09:46:52,278 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:52,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1614320984, now seen corresponding path program 1 times [2024-11-19 09:46:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:52,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516489813] [2024-11-19 09:46:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:52,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:52,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:52,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516489813] [2024-11-19 09:46:52,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516489813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:52,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830308959] [2024-11-19 09:46:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:52,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:52,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:52,706 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 09:46:52,707 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 09:46:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:52,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 09:46:52,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:52,800 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 09:46:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:46:52,843 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 14 treesize of output 9 [2024-11-19 09:46:52,851 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:46:52,851 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 09:46:52,876 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:46:52,876 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 14 treesize of output 13 [2024-11-19 09:46:52,944 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 09:46:52,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:53,116 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 46 treesize of output 42 [2024-11-19 09:46:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:46:53,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830308959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:53,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2024-11-19 09:46:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866176334] [2024-11-19 09:46:53,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:53,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:46:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:46:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:46:54,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 96 [2024-11-19 09:46:54,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 130 transitions, 752 flow. Second operand has 15 states, 15 states have (on average 37.333333333333336) internal successors, (560), 15 states have internal predecessors, (560), 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 09:46:54,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:54,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 96 [2024-11-19 09:46:54,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:57,748 INFO L124 PetriNetUnfolderBase]: 26924/42995 cut-off events. [2024-11-19 09:46:57,748 INFO L125 PetriNetUnfolderBase]: For 54103/54353 co-relation queries the response was YES. [2024-11-19 09:46:57,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109181 conditions, 42995 events. 26924/42995 cut-off events. For 54103/54353 co-relation queries the response was YES. Maximal size of possible extension queue 1115. Compared 319620 event pairs, 13049 based on Foata normal form. 0/37925 useless extension candidates. Maximal degree in co-relation 82595. Up to 14661 conditions per place. [2024-11-19 09:46:58,101 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 199 selfloop transitions, 33 changer transitions 0/254 dead transitions. [2024-11-19 09:46:58,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 254 transitions, 1761 flow [2024-11-19 09:46:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:46:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:46:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 518 transitions. [2024-11-19 09:46:58,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5395833333333333 [2024-11-19 09:46:58,103 INFO L175 Difference]: Start difference. First operand has 124 places, 130 transitions, 752 flow. Second operand 10 states and 518 transitions. [2024-11-19 09:46:58,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 254 transitions, 1761 flow [2024-11-19 09:46:58,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 254 transitions, 1737 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:58,167 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 842 flow [2024-11-19 09:46:58,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=842, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-11-19 09:46:58,167 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 43 predicate places. [2024-11-19 09:46:58,168 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 842 flow [2024-11-19 09:46:58,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.333333333333336) internal successors, (560), 15 states have internal predecessors, (560), 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 09:46:58,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:58,168 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:58,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:46:58,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 09:46:58,370 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:46:58,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1495656260, now seen corresponding path program 1 times [2024-11-19 09:46:58,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:58,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035313217] [2024-11-19 09:46:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:58,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:58,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:58,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035313217] [2024-11-19 09:46:58,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035313217] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:58,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022240414] [2024-11-19 09:46:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:58,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:58,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:58,579 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 09:46:58,581 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 09:46:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:58,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:46:58,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:58,764 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:58,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:46:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:46:58,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022240414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:58,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:58,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-19 09:46:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46969550] [2024-11-19 09:46:58,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:58,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:46:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:46:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:46:59,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-19 09:46:59,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 842 flow. Second operand has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 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 09:46:59,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:59,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-19 09:46:59,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:02,149 INFO L124 PetriNetUnfolderBase]: 21546/34329 cut-off events. [2024-11-19 09:47:02,149 INFO L125 PetriNetUnfolderBase]: For 53529/53967 co-relation queries the response was YES. [2024-11-19 09:47:02,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92899 conditions, 34329 events. 21546/34329 cut-off events. For 53529/53967 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 249370 event pairs, 10533 based on Foata normal form. 0/32109 useless extension candidates. Maximal degree in co-relation 71026. Up to 11045 conditions per place. [2024-11-19 09:47:02,439 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 175 selfloop transitions, 34 changer transitions 0/235 dead transitions. [2024-11-19 09:47:02,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 235 transitions, 1748 flow [2024-11-19 09:47:02,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:47:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:47:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 451 transitions. [2024-11-19 09:47:02,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6711309523809523 [2024-11-19 09:47:02,441 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 842 flow. Second operand 7 states and 451 transitions. [2024-11-19 09:47:02,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 235 transitions, 1748 flow [2024-11-19 09:47:02,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 235 transitions, 1692 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-19 09:47:02,520 INFO L231 Difference]: Finished difference. Result has 135 places, 134 transitions, 879 flow [2024-11-19 09:47:02,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=879, PETRI_PLACES=135, PETRI_TRANSITIONS=134} [2024-11-19 09:47:02,520 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 45 predicate places. [2024-11-19 09:47:02,521 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 134 transitions, 879 flow [2024-11-19 09:47:02,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 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 09:47:02,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:02,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:02,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:47:02,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:02,727 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:47:02,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1495656261, now seen corresponding path program 1 times [2024-11-19 09:47:02,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:02,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182496549] [2024-11-19 09:47:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182496549] [2024-11-19 09:47:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182496549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:02,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:02,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:47:02,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208303907] [2024-11-19 09:47:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:02,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:47:02,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:47:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:47:02,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2024-11-19 09:47:02,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 134 transitions, 879 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:02,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:02,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2024-11-19 09:47:02,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:05,407 INFO L124 PetriNetUnfolderBase]: 21908/34613 cut-off events. [2024-11-19 09:47:05,407 INFO L125 PetriNetUnfolderBase]: For 64106/64568 co-relation queries the response was YES. [2024-11-19 09:47:05,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97808 conditions, 34613 events. 21908/34613 cut-off events. For 64106/64568 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 246440 event pairs, 15768 based on Foata normal form. 514/33485 useless extension candidates. Maximal degree in co-relation 71386. Up to 29754 conditions per place. [2024-11-19 09:47:05,700 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 95 selfloop transitions, 13 changer transitions 0/130 dead transitions. [2024-11-19 09:47:05,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 130 transitions, 1087 flow [2024-11-19 09:47:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:47:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:47:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2024-11-19 09:47:05,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-11-19 09:47:05,702 INFO L175 Difference]: Start difference. First operand has 135 places, 134 transitions, 879 flow. Second operand 4 states and 205 transitions. [2024-11-19 09:47:05,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 130 transitions, 1087 flow [2024-11-19 09:47:05,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 130 transitions, 1030 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-19 09:47:05,826 INFO L231 Difference]: Finished difference. Result has 129 places, 130 transitions, 840 flow [2024-11-19 09:47:05,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=840, PETRI_PLACES=129, PETRI_TRANSITIONS=130} [2024-11-19 09:47:05,827 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 39 predicate places. [2024-11-19 09:47:05,827 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 130 transitions, 840 flow [2024-11-19 09:47:05,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:05,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:05,828 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:05,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:47:05,828 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:47:05,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1242170762, now seen corresponding path program 1 times [2024-11-19 09:47:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:05,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408244488] [2024-11-19 09:47:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:06,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408244488] [2024-11-19 09:47:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408244488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739204017] [2024-11-19 09:47:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:06,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:06,308 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 09:47:06,310 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 09:47:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:06,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:47:06,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:06,418 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 09:47:06,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:47:06,471 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 09:47:06,479 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:47:06,479 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 09:47:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:06,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:06,657 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 09:47:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:06,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739204017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:06,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:06,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:47:06,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455426334] [2024-11-19 09:47:06,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:06,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:47:06,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:47:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:47:07,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2024-11-19 09:47:07,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 130 transitions, 840 flow. Second operand has 13 states, 13 states have (on average 42.84615384615385) internal successors, (557), 13 states have internal predecessors, (557), 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 09:47:07,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:07,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2024-11-19 09:47:07,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:11,541 INFO L124 PetriNetUnfolderBase]: 28914/43983 cut-off events. [2024-11-19 09:47:11,542 INFO L125 PetriNetUnfolderBase]: For 87709/89158 co-relation queries the response was YES. [2024-11-19 09:47:11,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124368 conditions, 43983 events. 28914/43983 cut-off events. For 87709/89158 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 305868 event pairs, 12769 based on Foata normal form. 0/41628 useless extension candidates. Maximal degree in co-relation 85713. Up to 15493 conditions per place. [2024-11-19 09:47:11,948 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 189 selfloop transitions, 34 changer transitions 0/244 dead transitions. [2024-11-19 09:47:11,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 244 transitions, 1896 flow [2024-11-19 09:47:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:47:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:47:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 509 transitions. [2024-11-19 09:47:11,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5891203703703703 [2024-11-19 09:47:11,950 INFO L175 Difference]: Start difference. First operand has 129 places, 130 transitions, 840 flow. Second operand 9 states and 509 transitions. [2024-11-19 09:47:11,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 244 transitions, 1896 flow [2024-11-19 09:47:12,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 244 transitions, 1882 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:47:12,048 INFO L231 Difference]: Finished difference. Result has 136 places, 133 transitions, 933 flow [2024-11-19 09:47:12,048 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=933, PETRI_PLACES=136, PETRI_TRANSITIONS=133} [2024-11-19 09:47:12,049 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 46 predicate places. [2024-11-19 09:47:12,049 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 133 transitions, 933 flow [2024-11-19 09:47:12,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.84615384615385) internal successors, (557), 13 states have internal predecessors, (557), 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 09:47:12,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:12,050 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:12,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:12,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:12,253 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 09:47:12,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:12,254 INFO L85 PathProgramCache]: Analyzing trace with hash -31110897, now seen corresponding path program 1 times [2024-11-19 09:47:12,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:12,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578525170] [2024-11-19 09:47:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:12,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:12,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:12,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578525170] [2024-11-19 09:47:12,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578525170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:12,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470766676] [2024-11-19 09:47:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:12,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:12,366 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 09:47:12,367 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 09:47:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:12,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:47:12,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:12,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470766676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:12,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:12,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-19 09:47:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854520679] [2024-11-19 09:47:12,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:12,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:47:12,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:47:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:47:12,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-19 09:47:12,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 133 transitions, 933 flow. Second operand has 16 states, 16 states have (on average 48.25) internal successors, (772), 16 states have internal predecessors, (772), 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 09:47:12,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:12,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-19 09:47:12,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:22,480 INFO L124 PetriNetUnfolderBase]: 68597/106439 cut-off events. [2024-11-19 09:47:22,480 INFO L125 PetriNetUnfolderBase]: For 240856/243704 co-relation queries the response was YES. [2024-11-19 09:47:23,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314833 conditions, 106439 events. 68597/106439 cut-off events. For 240856/243704 co-relation queries the response was YES. Maximal size of possible extension queue 2822. Compared 866614 event pairs, 28775 based on Foata normal form. 1056/103965 useless extension candidates. Maximal degree in co-relation 244735. Up to 20132 conditions per place.