./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:28:33,697 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:28:33,770 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:28:33,775 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:28:33,776 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:28:33,807 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:28:33,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:28:33,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:28:33,811 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:28:33,812 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:28:33,812 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:28:33,812 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:28:33,813 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:28:33,813 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:28:33,815 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:28:33,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:28:33,816 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:28:33,816 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:28:33,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:28:33,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:28:33,817 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:28:33,820 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:28:33,820 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:28:33,821 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:28:33,821 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:28:33,821 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:28:33,821 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:28:33,822 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:28:33,822 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:28:33,822 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:28:33,822 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:28:33,823 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:28:33,823 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:28:33,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:28:33,823 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:28:33,824 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:28:33,824 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:28:33,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:28:33,825 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:28:33,825 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:28:33,826 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:28:33,826 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:28:33,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 [2024-11-12 16:28:34,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:28:34,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:28:34,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:28:34,132 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:28:34,132 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:28:34,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-12 16:28:35,540 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:28:35,720 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:28:35,720 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-12 16:28:35,728 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9bf6102/d580ac4c28b94a81a3f744b2a84b0dfa/FLAGe8edb5a07 [2024-11-12 16:28:35,741 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9bf6102/d580ac4c28b94a81a3f744b2a84b0dfa [2024-11-12 16:28:35,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:28:35,744 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:28:35,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:28:35,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:28:35,751 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:28:35,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:28:35" (1/1) ... [2024-11-12 16:28:35,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e1d585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:35, skipping insertion in model container [2024-11-12 16:28:35,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:28:35" (1/1) ... [2024-11-12 16:28:35,780 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:28:35,977 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:28:35,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:28:35,990 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:28:36,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:28:36,030 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:28:36,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36 WrapperNode [2024-11-12 16:28:36,031 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:28:36,032 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:28:36,032 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:28:36,032 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:28:36,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,072 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 266 [2024-11-12 16:28:36,072 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:28:36,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:28:36,073 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:28:36,073 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:28:36,082 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,087 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,103 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-12 16:28:36,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,127 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,129 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,131 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,134 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:28:36,135 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:28:36,135 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:28:36,136 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:28:36,136 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (1/1) ... [2024-11-12 16:28:36,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:28:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:36,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 16:28:36,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 16:28:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:28:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:28:36,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:28:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:28:36,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:28:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:28:36,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:28:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:28:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:28:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:28:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:28:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:28:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:28:36,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:28:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:28:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:28:36,246 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:28:36,383 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:28:36,386 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:28:36,911 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:28:36,912 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:28:37,337 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:28:37,337 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-12 16:28:37,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:28:37 BoogieIcfgContainer [2024-11-12 16:28:37,338 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:28:37,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:28:37,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:28:37,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:28:37,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:28:35" (1/3) ... [2024-11-12 16:28:37,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4837c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:28:37, skipping insertion in model container [2024-11-12 16:28:37,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:36" (2/3) ... [2024-11-12 16:28:37,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4837c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:28:37, skipping insertion in model container [2024-11-12 16:28:37,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:28:37" (3/3) ... [2024-11-12 16:28:37,349 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2024-11-12 16:28:37,367 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:28:37,368 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-12 16:28:37,368 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:28:37,438 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:28:37,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 59 transitions, 139 flow [2024-11-12 16:28:37,517 INFO L124 PetriNetUnfolderBase]: 5/56 cut-off events. [2024-11-12 16:28:37,518 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:28:37,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 5/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-11-12 16:28:37,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 59 transitions, 139 flow [2024-11-12 16:28:37,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 55 transitions, 128 flow [2024-11-12 16:28:37,538 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:28:37,546 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;@2aeafd5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:28:37,547 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-12 16:28:37,551 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:28:37,552 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:28:37,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:28:37,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:37,553 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:28:37,553 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:37,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:37,559 INFO L85 PathProgramCache]: Analyzing trace with hash 894442, now seen corresponding path program 1 times [2024-11-12 16:28:37,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:37,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675151052] [2024-11-12 16:28:37,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:37,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:37,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:37,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675151052] [2024-11-12 16:28:37,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675151052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:37,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:28:37,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755756880] [2024-11-12 16:28:37,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:37,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:28:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:28:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:28:38,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-12 16:28:38,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:38,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:38,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-12 16:28:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:38,261 INFO L124 PetriNetUnfolderBase]: 333/711 cut-off events. [2024-11-12 16:28:38,262 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-12 16:28:38,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 711 events. 333/711 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3933 event pairs, 226 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 1092. Up to 481 conditions per place. [2024-11-12 16:28:38,275 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 26 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-12 16:28:38,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 176 flow [2024-11-12 16:28:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:28:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:28:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-12 16:28:38,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2024-11-12 16:28:38,291 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2024-11-12 16:28:38,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 176 flow [2024-11-12 16:28:38,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:28:38,303 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 112 flow [2024-11-12 16:28:38,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-11-12 16:28:38,310 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-12 16:28:38,310 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 112 flow [2024-11-12 16:28:38,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:38,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:38,311 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:28:38,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:28:38,311 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:38,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 894443, now seen corresponding path program 1 times [2024-11-12 16:28:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:38,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131841910] [2024-11-12 16:28:38,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:38,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:38,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131841910] [2024-11-12 16:28:38,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131841910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:38,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:38,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:28:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292730364] [2024-11-12 16:28:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:38,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:38,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:28:38,636 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-12 16:28:38,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:38,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:38,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-12 16:28:38,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:38,847 INFO L124 PetriNetUnfolderBase]: 333/710 cut-off events. [2024-11-12 16:28:38,847 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-12 16:28:38,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 710 events. 333/710 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3932 event pairs, 226 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1197. Up to 485 conditions per place. [2024-11-12 16:28:38,857 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-12 16:28:38,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 168 flow [2024-11-12 16:28:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-12 16:28:38,860 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5847457627118644 [2024-11-12 16:28:38,860 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 112 flow. Second operand 4 states and 138 transitions. [2024-11-12 16:28:38,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 168 flow [2024-11-12 16:28:38,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:38,862 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 114 flow [2024-11-12 16:28:38,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-12 16:28:38,864 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-12 16:28:38,864 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 114 flow [2024-11-12 16:28:38,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:38,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:38,865 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:28:38,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:28:38,866 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:38,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:38,867 INFO L85 PathProgramCache]: Analyzing trace with hash 27730020, now seen corresponding path program 1 times [2024-11-12 16:28:38,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:38,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954812101] [2024-11-12 16:28:38,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:38,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:38,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:38,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954812101] [2024-11-12 16:28:38,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954812101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:38,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:38,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:28:38,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894219704] [2024-11-12 16:28:38,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:38,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:38,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:38,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:38,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:28:39,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-11-12 16:28:39,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:39,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:39,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-11-12 16:28:39,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:39,142 INFO L124 PetriNetUnfolderBase]: 333/716 cut-off events. [2024-11-12 16:28:39,143 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-12 16:28:39,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 716 events. 333/716 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3935 event pairs, 226 based on Foata normal form. 1/595 useless extension candidates. Maximal degree in co-relation 1209. Up to 487 conditions per place. [2024-11-12 16:28:39,148 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 28 selfloop transitions, 4 changer transitions 1/55 dead transitions. [2024-11-12 16:28:39,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 196 flow [2024-11-12 16:28:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-12 16:28:39,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2024-11-12 16:28:39,150 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-12 16:28:39,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 196 flow [2024-11-12 16:28:39,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:28:39,152 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 132 flow [2024-11-12 16:28:39,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-11-12 16:28:39,153 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2024-11-12 16:28:39,154 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 132 flow [2024-11-12 16:28:39,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:39,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:39,154 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:28:39,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:28:39,154 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:39,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 877435966, now seen corresponding path program 1 times [2024-11-12 16:28:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:39,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011621132] [2024-11-12 16:28:39,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:39,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:39,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011621132] [2024-11-12 16:28:39,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011621132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:39,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115830939] [2024-11-12 16:28:39,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:39,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:39,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:39,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:39,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:28:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:39,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:28:39,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:39,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:39,670 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:28:39,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:28:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:39,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:39,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115830939] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:39,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:28:39,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-12 16:28:39,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254323439] [2024-11-12 16:28:39,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:39,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:28:39,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:28:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:28:39,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-12 16:28:39,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:39,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:39,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-12 16:28:39,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:40,020 INFO L124 PetriNetUnfolderBase]: 333/714 cut-off events. [2024-11-12 16:28:40,020 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-12 16:28:40,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 714 events. 333/714 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3932 event pairs, 226 based on Foata normal form. 1/596 useless extension candidates. Maximal degree in co-relation 1209. Up to 487 conditions per place. [2024-11-12 16:28:40,027 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 29 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-12 16:28:40,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 204 flow [2024-11-12 16:28:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:28:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:28:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-12 16:28:40,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5728813559322034 [2024-11-12 16:28:40,032 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 132 flow. Second operand 5 states and 169 transitions. [2024-11-12 16:28:40,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 204 flow [2024-11-12 16:28:40,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 194 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:40,034 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 136 flow [2024-11-12 16:28:40,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-12 16:28:40,036 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2024-11-12 16:28:40,036 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 136 flow [2024-11-12 16:28:40,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:40,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:40,037 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:40,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:28:40,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:40,242 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:40,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1402402505, now seen corresponding path program 1 times [2024-11-12 16:28:40,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:40,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204034503] [2024-11-12 16:28:40,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:40,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204034503] [2024-11-12 16:28:40,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204034503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:40,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986892338] [2024-11-12 16:28:40,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:40,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:40,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:40,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:28:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:40,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:28:40,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:40,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:40,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986892338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:40,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:40,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 16:28:40,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814108592] [2024-11-12 16:28:40,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:40,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:28:40,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:40,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:28:40,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:28:40,681 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-11-12 16:28:40,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 136 flow. Second operand has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:40,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:40,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-11-12 16:28:40,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:41,031 INFO L124 PetriNetUnfolderBase]: 665/1426 cut-off events. [2024-11-12 16:28:41,031 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-12 16:28:41,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 1426 events. 665/1426 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8973 event pairs, 452 based on Foata normal form. 1/1204 useless extension candidates. Maximal degree in co-relation 1217. Up to 485 conditions per place. [2024-11-12 16:28:41,042 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 48 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-11-12 16:28:41,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 348 flow [2024-11-12 16:28:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:28:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:28:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 295 transitions. [2024-11-12 16:28:41,046 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-12 16:28:41,046 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 136 flow. Second operand 8 states and 295 transitions. [2024-11-12 16:28:41,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 348 flow [2024-11-12 16:28:41,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:41,051 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 209 flow [2024-11-12 16:28:41,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-11-12 16:28:41,053 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-11-12 16:28:41,054 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 209 flow [2024-11-12 16:28:41,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:41,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:41,055 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-12 16:28:41,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:28:41,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:41,259 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:41,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2097608099, now seen corresponding path program 2 times [2024-11-12 16:28:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:41,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589750050] [2024-11-12 16:28:41,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:41,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589750050] [2024-11-12 16:28:41,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589750050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:41,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194965813] [2024-11-12 16:28:41,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:28:41,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:41,578 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:41,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:28:41,653 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:28:41,653 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:28:41,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 16:28:41,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:41,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:41,797 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:28:41,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:28:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:41,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:42,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194965813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:42,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:42,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:28:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143217846] [2024-11-12 16:28:42,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:42,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:28:42,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:28:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:28:42,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-12 16:28:42,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 209 flow. Second operand has 19 states, 19 states have (on average 28.57894736842105) internal successors, (543), 19 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:42,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:42,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-12 16:28:42,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:43,624 INFO L124 PetriNetUnfolderBase]: 666/1435 cut-off events. [2024-11-12 16:28:43,624 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-12 16:28:43,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 1435 events. 666/1435 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8885 event pairs, 452 based on Foata normal form. 4/1216 useless extension candidates. Maximal degree in co-relation 1235. Up to 488 conditions per place. [2024-11-12 16:28:43,635 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 57 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-11-12 16:28:43,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 483 flow [2024-11-12 16:28:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:28:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:28:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 374 transitions. [2024-11-12 16:28:43,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.576271186440678 [2024-11-12 16:28:43,637 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 209 flow. Second operand 11 states and 374 transitions. [2024-11-12 16:28:43,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 483 flow [2024-11-12 16:28:43,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 455 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-12 16:28:43,642 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 283 flow [2024-11-12 16:28:43,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=283, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-12 16:28:43,644 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-11-12 16:28:43,645 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 283 flow [2024-11-12 16:28:43,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 28.57894736842105) internal successors, (543), 19 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:43,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:43,646 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:43,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:28:43,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:43,851 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:43,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:43,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1830191831, now seen corresponding path program 1 times [2024-11-12 16:28:43,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:43,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150754134] [2024-11-12 16:28:43,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:43,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:44,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:44,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150754134] [2024-11-12 16:28:44,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150754134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:44,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417824268] [2024-11-12 16:28:44,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:44,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:44,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:44,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:44,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:28:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:44,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 16:28:44,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:44,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:28:44,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:44,219 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:28:44,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:28:44,238 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 31 treesize of output 24 [2024-11-12 16:28:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:44,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:44,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417824268] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:44,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:28:44,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-12 16:28:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466640437] [2024-11-12 16:28:44,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:44,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:28:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:28:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:28:44,803 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-12 16:28:44,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:44,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:44,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-12 16:28:44,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:45,257 INFO L124 PetriNetUnfolderBase]: 1338/2735 cut-off events. [2024-11-12 16:28:45,257 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-12 16:28:45,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 2735 events. 1338/2735 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19506 event pairs, 526 based on Foata normal form. 0/2321 useless extension candidates. Maximal degree in co-relation 4773. Up to 1241 conditions per place. [2024-11-12 16:28:45,279 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 48 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-11-12 16:28:45,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 445 flow [2024-11-12 16:28:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:28:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:28:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-11-12 16:28:45,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5738498789346247 [2024-11-12 16:28:45,281 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 283 flow. Second operand 7 states and 237 transitions. [2024-11-12 16:28:45,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 445 flow [2024-11-12 16:28:45,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 418 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-12 16:28:45,288 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 305 flow [2024-11-12 16:28:45,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=305, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2024-11-12 16:28:45,289 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 19 predicate places. [2024-11-12 16:28:45,289 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 305 flow [2024-11-12 16:28:45,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:45,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:45,290 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:45,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:45,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:45,490 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:45,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1830191830, now seen corresponding path program 1 times [2024-11-12 16:28:45,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:45,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529524556] [2024-11-12 16:28:45,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:45,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:45,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:45,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529524556] [2024-11-12 16:28:45,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529524556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:45,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:45,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:28:45,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102897454] [2024-11-12 16:28:45,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:45,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:28:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:28:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:28:45,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2024-11-12 16:28:45,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:45,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:45,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2024-11-12 16:28:45,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:45,969 INFO L124 PetriNetUnfolderBase]: 1710/3085 cut-off events. [2024-11-12 16:28:45,970 INFO L125 PetriNetUnfolderBase]: For 1904/2052 co-relation queries the response was YES. [2024-11-12 16:28:45,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6930 conditions, 3085 events. 1710/3085 cut-off events. For 1904/2052 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19393 event pairs, 1216 based on Foata normal form. 246/3221 useless extension candidates. Maximal degree in co-relation 6895. Up to 2393 conditions per place. [2024-11-12 16:28:46,001 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 42 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-12 16:28:46,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 65 transitions, 397 flow [2024-11-12 16:28:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:28:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:28:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-12 16:28:46,003 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4711864406779661 [2024-11-12 16:28:46,003 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 305 flow. Second operand 5 states and 139 transitions. [2024-11-12 16:28:46,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 65 transitions, 397 flow [2024-11-12 16:28:46,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 386 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:28:46,006 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 302 flow [2024-11-12 16:28:46,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2024-11-12 16:28:46,007 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 17 predicate places. [2024-11-12 16:28:46,007 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 302 flow [2024-11-12 16:28:46,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:46,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:46,008 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-12 16:28:46,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:28:46,008 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:46,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:46,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1461750510, now seen corresponding path program 3 times [2024-11-12 16:28:46,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:46,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366002420] [2024-11-12 16:28:46,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:46,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:46,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:46,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366002420] [2024-11-12 16:28:46,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366002420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:46,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462342100] [2024-11-12 16:28:46,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:28:46,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:46,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:46,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:46,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:28:46,216 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:28:46,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:28:46,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 16:28:46,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:46,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:46,314 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:28:46,314 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 25 treesize of output 22 [2024-11-12 16:28:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:28:46,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:28:46,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462342100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:46,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:46,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:28:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114394867] [2024-11-12 16:28:46,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:46,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:28:46,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:46,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:28:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:28:47,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-12 16:28:47,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 302 flow. Second operand has 18 states, 18 states have (on average 28.77777777777778) internal successors, (518), 18 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:47,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:47,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-12 16:28:47,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:48,225 INFO L124 PetriNetUnfolderBase]: 866/1778 cut-off events. [2024-11-12 16:28:48,225 INFO L125 PetriNetUnfolderBase]: For 1010/1232 co-relation queries the response was YES. [2024-11-12 16:28:48,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3790 conditions, 1778 events. 866/1778 cut-off events. For 1010/1232 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11591 event pairs, 612 based on Foata normal form. 3/1563 useless extension candidates. Maximal degree in co-relation 3733. Up to 1242 conditions per place. [2024-11-12 16:28:48,241 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 25 selfloop transitions, 27 changer transitions 0/71 dead transitions. [2024-11-12 16:28:48,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 71 transitions, 444 flow [2024-11-12 16:28:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 16:28:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 16:28:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 513 transitions. [2024-11-12 16:28:48,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5114656031904287 [2024-11-12 16:28:48,244 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 302 flow. Second operand 17 states and 513 transitions. [2024-11-12 16:28:48,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 71 transitions, 444 flow [2024-11-12 16:28:48,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 71 transitions, 422 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:28:48,248 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 371 flow [2024-11-12 16:28:48,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=371, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2024-11-12 16:28:48,249 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2024-11-12 16:28:48,249 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 371 flow [2024-11-12 16:28:48,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 28.77777777777778) internal successors, (518), 18 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:48,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:48,250 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:48,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:28:48,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:48,455 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:48,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:48,455 INFO L85 PathProgramCache]: Analyzing trace with hash 901372759, now seen corresponding path program 1 times [2024-11-12 16:28:48,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:48,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824071002] [2024-11-12 16:28:48,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:48,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:48,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:48,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824071002] [2024-11-12 16:28:48,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824071002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:48,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:48,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:28:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176549290] [2024-11-12 16:28:48,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:48,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:48,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:28:48,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-12 16:28:48,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:48,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:48,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-12 16:28:48,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:48,767 INFO L124 PetriNetUnfolderBase]: 866/1694 cut-off events. [2024-11-12 16:28:48,767 INFO L125 PetriNetUnfolderBase]: For 1005/1227 co-relation queries the response was YES. [2024-11-12 16:28:48,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3733 conditions, 1694 events. 866/1694 cut-off events. For 1005/1227 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10483 event pairs, 612 based on Foata normal form. 78/1638 useless extension candidates. Maximal degree in co-relation 1901. Up to 1242 conditions per place. [2024-11-12 16:28:48,779 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 45 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-11-12 16:28:48,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 66 transitions, 465 flow [2024-11-12 16:28:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-12 16:28:48,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.538135593220339 [2024-11-12 16:28:48,781 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 371 flow. Second operand 4 states and 127 transitions. [2024-11-12 16:28:48,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 66 transitions, 465 flow [2024-11-12 16:28:48,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 377 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-11-12 16:28:48,785 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 287 flow [2024-11-12 16:28:48,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-12 16:28:48,786 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-11-12 16:28:48,786 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 287 flow [2024-11-12 16:28:48,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:48,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:48,787 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:48,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:28:48,787 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:48,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash 901372760, now seen corresponding path program 1 times [2024-11-12 16:28:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:48,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304655235] [2024-11-12 16:28:48,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:48,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:48,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304655235] [2024-11-12 16:28:48,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304655235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:49,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613464053] [2024-11-12 16:28:49,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:49,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:49,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:49,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:49,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:28:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:49,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:28:49,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:49,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:49,186 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 [2024-11-12 16:28:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:49,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613464053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:49,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:49,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-12 16:28:49,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628734372] [2024-11-12 16:28:49,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:49,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:28:49,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:28:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:28:49,380 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:28:49,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 287 flow. Second operand has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:49,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:49,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:28:49,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:49,704 INFO L124 PetriNetUnfolderBase]: 1142/2182 cut-off events. [2024-11-12 16:28:49,704 INFO L125 PetriNetUnfolderBase]: For 886/1054 co-relation queries the response was YES. [2024-11-12 16:28:49,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4828 conditions, 2182 events. 1142/2182 cut-off events. For 886/1054 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13746 event pairs, 490 based on Foata normal form. 136/2183 useless extension candidates. Maximal degree in co-relation 2360. Up to 1326 conditions per place. [2024-11-12 16:28:49,716 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 50 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-11-12 16:28:49,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 451 flow [2024-11-12 16:28:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:28:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:28:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-11-12 16:28:49,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6129943502824858 [2024-11-12 16:28:49,718 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 287 flow. Second operand 6 states and 217 transitions. [2024-11-12 16:28:49,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 451 flow [2024-11-12 16:28:49,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 445 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:49,721 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 324 flow [2024-11-12 16:28:49,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2024-11-12 16:28:49,722 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-11-12 16:28:49,722 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 324 flow [2024-11-12 16:28:49,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:49,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:49,722 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:49,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:49,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:49,923 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:49,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2128554220, now seen corresponding path program 1 times [2024-11-12 16:28:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:49,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822132320] [2024-11-12 16:28:49,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:50,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:50,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822132320] [2024-11-12 16:28:50,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822132320] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:50,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880556043] [2024-11-12 16:28:50,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:50,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:50,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:50,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:50,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:28:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:50,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:28:50,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:50,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:50,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880556043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:50,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:50,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:28:50,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519560718] [2024-11-12 16:28:50,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:50,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:28:50,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:50,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:28:50,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:28:50,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:28:50,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 324 flow. Second operand has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:50,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:50,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:28:50,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:50,657 INFO L124 PetriNetUnfolderBase]: 902/1663 cut-off events. [2024-11-12 16:28:50,657 INFO L125 PetriNetUnfolderBase]: For 2757/3056 co-relation queries the response was YES. [2024-11-12 16:28:50,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4387 conditions, 1663 events. 902/1663 cut-off events. For 2757/3056 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9350 event pairs, 517 based on Foata normal form. 0/1520 useless extension candidates. Maximal degree in co-relation 2733. Up to 830 conditions per place. [2024-11-12 16:28:50,669 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 65 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-11-12 16:28:50,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 102 transitions, 642 flow [2024-11-12 16:28:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:28:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:28:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 324 transitions. [2024-11-12 16:28:50,671 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6101694915254238 [2024-11-12 16:28:50,671 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 324 flow. Second operand 9 states and 324 transitions. [2024-11-12 16:28:50,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 102 transitions, 642 flow [2024-11-12 16:28:50,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 102 transitions, 596 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:28:50,675 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 351 flow [2024-11-12 16:28:50,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2024-11-12 16:28:50,676 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2024-11-12 16:28:50,676 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 351 flow [2024-11-12 16:28:50,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:50,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:50,676 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:50,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:28:50,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:50,881 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:50,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1364141571, now seen corresponding path program 1 times [2024-11-12 16:28:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:50,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141093276] [2024-11-12 16:28:50,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:50,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:51,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141093276] [2024-11-12 16:28:51,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141093276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729220433] [2024-11-12 16:28:51,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:51,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:51,004 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:51,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:28:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:51,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:28:51,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:51,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729220433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:51,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:28:51,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337343105] [2024-11-12 16:28:51,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:51,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:28:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:28:51,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:28:51,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:28:51,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 351 flow. Second operand has 14 states, 14 states have (on average 29.928571428571427) internal successors, (419), 14 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:51,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:51,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:28:51,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:51,562 INFO L124 PetriNetUnfolderBase]: 1016/1900 cut-off events. [2024-11-12 16:28:51,562 INFO L125 PetriNetUnfolderBase]: For 1371/1490 co-relation queries the response was YES. [2024-11-12 16:28:51,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4742 conditions, 1900 events. 1016/1900 cut-off events. For 1371/1490 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11063 event pairs, 571 based on Foata normal form. 32/1816 useless extension candidates. Maximal degree in co-relation 2901. Up to 952 conditions per place. [2024-11-12 16:28:51,574 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 72 selfloop transitions, 24 changer transitions 0/111 dead transitions. [2024-11-12 16:28:51,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 678 flow [2024-11-12 16:28:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:28:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:28:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 365 transitions. [2024-11-12 16:28:51,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6186440677966102 [2024-11-12 16:28:51,576 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 351 flow. Second operand 10 states and 365 transitions. [2024-11-12 16:28:51,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 678 flow [2024-11-12 16:28:51,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 111 transitions, 639 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:28:51,580 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 404 flow [2024-11-12 16:28:51,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=404, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2024-11-12 16:28:51,580 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 31 predicate places. [2024-11-12 16:28:51,581 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 404 flow [2024-11-12 16:28:51,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 29.928571428571427) internal successors, (419), 14 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:51,581 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:51,581 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:51,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:28:51,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-12 16:28:51,782 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:51,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:51,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1158569841, now seen corresponding path program 1 times [2024-11-12 16:28:51,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:51,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293241916] [2024-11-12 16:28:51,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:51,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:52,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:52,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293241916] [2024-11-12 16:28:52,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293241916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:52,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:52,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:28:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011020161] [2024-11-12 16:28:52,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:52,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:28:52,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:28:52,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:28:52,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-11-12 16:28:52,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:52,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:52,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-11-12 16:28:52,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:52,481 INFO L124 PetriNetUnfolderBase]: 1286/2304 cut-off events. [2024-11-12 16:28:52,482 INFO L125 PetriNetUnfolderBase]: For 5115/5652 co-relation queries the response was YES. [2024-11-12 16:28:52,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 2304 events. 1286/2304 cut-off events. For 5115/5652 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13266 event pairs, 527 based on Foata normal form. 0/2175 useless extension candidates. Maximal degree in co-relation 4262. Up to 1092 conditions per place. [2024-11-12 16:28:52,498 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 67 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2024-11-12 16:28:52,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 679 flow [2024-11-12 16:28:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:28:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:28:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-11-12 16:28:52,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5451977401129944 [2024-11-12 16:28:52,500 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 404 flow. Second operand 6 states and 193 transitions. [2024-11-12 16:28:52,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 679 flow [2024-11-12 16:28:52,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 636 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-12 16:28:52,505 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 409 flow [2024-11-12 16:28:52,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2024-11-12 16:28:52,506 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-12 16:28:52,506 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 409 flow [2024-11-12 16:28:52,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:52,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:52,507 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:52,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-12 16:28:52,507 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:52,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1555925836, now seen corresponding path program 1 times [2024-11-12 16:28:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:52,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456143115] [2024-11-12 16:28:52,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456143115] [2024-11-12 16:28:52,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456143115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364362157] [2024-11-12 16:28:52,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:52,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:52,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:52,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:28:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:52,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 16:28:52,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:52,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:53,080 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 36 treesize of output 32 [2024-11-12 16:28:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364362157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:53,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:53,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-12 16:28:53,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314007902] [2024-11-12 16:28:53,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:53,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:28:53,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:53,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:28:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:28:53,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:28:53,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 409 flow. Second operand has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:53,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:53,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:28:53,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:54,731 INFO L124 PetriNetUnfolderBase]: 1219/2135 cut-off events. [2024-11-12 16:28:54,731 INFO L125 PetriNetUnfolderBase]: For 5641/6236 co-relation queries the response was YES. [2024-11-12 16:28:54,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 2135 events. 1219/2135 cut-off events. For 5641/6236 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12024 event pairs, 527 based on Foata normal form. 6/2020 useless extension candidates. Maximal degree in co-relation 4600. Up to 664 conditions per place. [2024-11-12 16:28:54,747 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 87 selfloop transitions, 33 changer transitions 0/136 dead transitions. [2024-11-12 16:28:54,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 963 flow [2024-11-12 16:28:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-12 16:28:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-12 16:28:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 524 transitions. [2024-11-12 16:28:54,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.592090395480226 [2024-11-12 16:28:54,752 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 409 flow. Second operand 15 states and 524 transitions. [2024-11-12 16:28:54,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 963 flow [2024-11-12 16:28:54,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 951 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:28:54,759 INFO L231 Difference]: Finished difference. Result has 108 places, 82 transitions, 532 flow [2024-11-12 16:28:54,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=532, PETRI_PLACES=108, PETRI_TRANSITIONS=82} [2024-11-12 16:28:54,760 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 48 predicate places. [2024-11-12 16:28:54,760 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 82 transitions, 532 flow [2024-11-12 16:28:54,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:54,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:54,761 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:54,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:54,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-12 16:28:54,966 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:54,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash 395776527, now seen corresponding path program 2 times [2024-11-12 16:28:54,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:54,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710721163] [2024-11-12 16:28:54,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:54,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:28:55,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:55,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710721163] [2024-11-12 16:28:55,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710721163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:55,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044351702] [2024-11-12 16:28:55,212 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:28:55,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:55,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:55,214 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:55,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:28:55,297 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:28:55,298 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:28:55,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 16:28:55,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:55,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:55,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:28:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:28:55,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:28:55,412 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:28:55,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:28:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:28:55,586 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:28:55,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044351702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:55,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:28:55,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-12 16:28:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826220507] [2024-11-12 16:28:55,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:55,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:28:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:28:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:28:55,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-12 16:28:55,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 82 transitions, 532 flow. Second operand has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:55,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:55,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-12 16:28:55,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:56,111 INFO L124 PetriNetUnfolderBase]: 1358/2352 cut-off events. [2024-11-12 16:28:56,111 INFO L125 PetriNetUnfolderBase]: For 7968/8588 co-relation queries the response was YES. [2024-11-12 16:28:56,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8640 conditions, 2352 events. 1358/2352 cut-off events. For 7968/8588 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13314 event pairs, 400 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 5891. Up to 829 conditions per place. [2024-11-12 16:28:56,128 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 92 selfloop transitions, 14 changer transitions 0/120 dead transitions. [2024-11-12 16:28:56,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 120 transitions, 1016 flow [2024-11-12 16:28:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:28:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:28:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-11-12 16:28:56,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5351089588377724 [2024-11-12 16:28:56,130 INFO L175 Difference]: Start difference. First operand has 108 places, 82 transitions, 532 flow. Second operand 7 states and 221 transitions. [2024-11-12 16:28:56,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 120 transitions, 1016 flow [2024-11-12 16:28:56,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 120 transitions, 948 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-12 16:28:56,138 INFO L231 Difference]: Finished difference. Result has 105 places, 81 transitions, 500 flow [2024-11-12 16:28:56,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=500, PETRI_PLACES=105, PETRI_TRANSITIONS=81} [2024-11-12 16:28:56,139 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 45 predicate places. [2024-11-12 16:28:56,139 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 81 transitions, 500 flow [2024-11-12 16:28:56,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:56,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:56,139 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:56,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 16:28:56,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 16:28:56,340 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:56,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash -615828695, now seen corresponding path program 1 times [2024-11-12 16:28:56,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:56,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80987454] [2024-11-12 16:28:56,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:56,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:56,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80987454] [2024-11-12 16:28:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80987454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509988530] [2024-11-12 16:28:56,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:56,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:56,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:56,634 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:56,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:28:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:56,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:28:56,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:28:56,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:56,913 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 [2024-11-12 16:28:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:28:56,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509988530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:56,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:56,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-12 16:28:56,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663360855] [2024-11-12 16:28:56,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:56,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:28:56,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:56,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:28:56,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:28:57,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:28:57,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 81 transitions, 500 flow. Second operand has 18 states, 18 states have (on average 30.166666666666668) internal successors, (543), 18 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:57,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:57,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:28:57,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:58,203 INFO L124 PetriNetUnfolderBase]: 1758/3140 cut-off events. [2024-11-12 16:28:58,204 INFO L125 PetriNetUnfolderBase]: For 9445/10316 co-relation queries the response was YES. [2024-11-12 16:28:58,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11293 conditions, 3140 events. 1758/3140 cut-off events. For 9445/10316 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 18190 event pairs, 582 based on Foata normal form. 0/3032 useless extension candidates. Maximal degree in co-relation 8387. Up to 888 conditions per place. [2024-11-12 16:28:58,230 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 104 selfloop transitions, 24 changer transitions 0/143 dead transitions. [2024-11-12 16:28:58,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 143 transitions, 1096 flow [2024-11-12 16:28:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 16:28:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 16:28:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 492 transitions. [2024-11-12 16:28:58,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5956416464891041 [2024-11-12 16:28:58,234 INFO L175 Difference]: Start difference. First operand has 105 places, 81 transitions, 500 flow. Second operand 14 states and 492 transitions. [2024-11-12 16:28:58,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 143 transitions, 1096 flow [2024-11-12 16:28:58,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 143 transitions, 1062 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:28:58,244 INFO L231 Difference]: Finished difference. Result has 115 places, 85 transitions, 555 flow [2024-11-12 16:28:58,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=555, PETRI_PLACES=115, PETRI_TRANSITIONS=85} [2024-11-12 16:28:58,245 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-11-12 16:28:58,245 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 85 transitions, 555 flow [2024-11-12 16:28:58,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.166666666666668) internal successors, (543), 18 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:58,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:58,246 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:58,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:58,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 16:28:58,446 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:58,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:58,447 INFO L85 PathProgramCache]: Analyzing trace with hash -419299742, now seen corresponding path program 2 times [2024-11-12 16:28:58,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:58,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193688357] [2024-11-12 16:28:58,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:28:58,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:58,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193688357] [2024-11-12 16:28:58,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193688357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:58,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284466604] [2024-11-12 16:28:58,671 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:28:58,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:58,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:58,673 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:58,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:28:58,765 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:28:58,765 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:28:58,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-12 16:28:58,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:58,773 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 [2024-11-12 16:28:58,836 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-12 16:28:58,837 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 16 treesize of output 18 [2024-11-12 16:28:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:59,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:28:59,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284466604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:59,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:59,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2024-11-12 16:28:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824579209] [2024-11-12 16:28:59,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:59,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:28:59,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:28:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:29:00,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-12 16:29:00,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 85 transitions, 555 flow. Second operand has 22 states, 22 states have (on average 25.0) internal successors, (550), 22 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:00,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:00,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-12 16:29:00,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:01,333 INFO L124 PetriNetUnfolderBase]: 3015/4950 cut-off events. [2024-11-12 16:29:01,333 INFO L125 PetriNetUnfolderBase]: For 12907/13514 co-relation queries the response was YES. [2024-11-12 16:29:01,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18413 conditions, 4950 events. 3015/4950 cut-off events. For 12907/13514 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 29028 event pairs, 1070 based on Foata normal form. 86/4878 useless extension candidates. Maximal degree in co-relation 15001. Up to 1627 conditions per place. [2024-11-12 16:29:01,372 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 135 selfloop transitions, 24 changer transitions 0/172 dead transitions. [2024-11-12 16:29:01,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 172 transitions, 1329 flow [2024-11-12 16:29:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-12 16:29:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-12 16:29:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 464 transitions. [2024-11-12 16:29:01,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5242937853107345 [2024-11-12 16:29:01,375 INFO L175 Difference]: Start difference. First operand has 115 places, 85 transitions, 555 flow. Second operand 15 states and 464 transitions. [2024-11-12 16:29:01,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 172 transitions, 1329 flow [2024-11-12 16:29:01,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 172 transitions, 1280 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-11-12 16:29:01,390 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 612 flow [2024-11-12 16:29:01,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=612, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2024-11-12 16:29:01,391 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-11-12 16:29:01,391 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 612 flow [2024-11-12 16:29:01,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 25.0) internal successors, (550), 22 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:01,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:01,392 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:01,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 16:29:01,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 16:29:01,592 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:01,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash -113389267, now seen corresponding path program 1 times [2024-11-12 16:29:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:01,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824666667] [2024-11-12 16:29:01,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:01,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:01,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:01,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824666667] [2024-11-12 16:29:01,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824666667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:01,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708612024] [2024-11-12 16:29:01,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:01,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:01,898 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:01,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 16:29:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:01,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:29:01,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:02,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:02,240 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 24 treesize of output 20 [2024-11-12 16:29:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:02,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708612024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:02,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:02,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-12 16:29:02,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562453487] [2024-11-12 16:29:02,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:02,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:29:02,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:02,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:29:02,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:29:03,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:29:03,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 612 flow. Second operand has 22 states, 22 states have (on average 29.681818181818183) internal successors, (653), 22 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:03,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:03,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:29:03,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:04,051 INFO L124 PetriNetUnfolderBase]: 2183/4043 cut-off events. [2024-11-12 16:29:04,051 INFO L125 PetriNetUnfolderBase]: For 14894/15805 co-relation queries the response was YES. [2024-11-12 16:29:04,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15441 conditions, 4043 events. 2183/4043 cut-off events. For 14894/15805 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 25353 event pairs, 886 based on Foata normal form. 86/4037 useless extension candidates. Maximal degree in co-relation 12523. Up to 1627 conditions per place. [2024-11-12 16:29:04,083 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 101 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-11-12 16:29:04,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 139 transitions, 1102 flow [2024-11-12 16:29:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:29:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:29:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 427 transitions. [2024-11-12 16:29:04,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6031073446327684 [2024-11-12 16:29:04,085 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 612 flow. Second operand 12 states and 427 transitions. [2024-11-12 16:29:04,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 139 transitions, 1102 flow [2024-11-12 16:29:04,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 139 transitions, 1059 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-11-12 16:29:04,101 INFO L231 Difference]: Finished difference. Result has 124 places, 89 transitions, 616 flow [2024-11-12 16:29:04,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=616, PETRI_PLACES=124, PETRI_TRANSITIONS=89} [2024-11-12 16:29:04,102 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 64 predicate places. [2024-11-12 16:29:04,102 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 89 transitions, 616 flow [2024-11-12 16:29:04,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 29.681818181818183) internal successors, (653), 22 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:04,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:04,103 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:04,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-12 16:29:04,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:04,306 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:04,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1600887366, now seen corresponding path program 1 times [2024-11-12 16:29:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:04,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291271351] [2024-11-12 16:29:04,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:04,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:04,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291271351] [2024-11-12 16:29:04,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291271351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:04,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786602727] [2024-11-12 16:29:04,414 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:04,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:04,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:04,417 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:04,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 16:29:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:04,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:29:04,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:04,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:04,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786602727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:04,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:04,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-12 16:29:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272330228] [2024-11-12 16:29:04,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:04,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:29:04,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:04,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:29:04,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:29:04,794 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:29:04,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 89 transitions, 616 flow. Second operand has 15 states, 15 states have (on average 30.4) internal successors, (456), 15 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:04,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:04,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:29:04,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:05,258 INFO L124 PetriNetUnfolderBase]: 2392/3797 cut-off events. [2024-11-12 16:29:05,258 INFO L125 PetriNetUnfolderBase]: For 19364/21249 co-relation queries the response was YES. [2024-11-12 16:29:05,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15561 conditions, 3797 events. 2392/3797 cut-off events. For 19364/21249 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20130 event pairs, 1371 based on Foata normal form. 28/3757 useless extension candidates. Maximal degree in co-relation 13178. Up to 2600 conditions per place. [2024-11-12 16:29:05,284 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 77 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2024-11-12 16:29:05,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 118 transitions, 945 flow [2024-11-12 16:29:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:29:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:29:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 359 transitions. [2024-11-12 16:29:05,285 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6084745762711864 [2024-11-12 16:29:05,286 INFO L175 Difference]: Start difference. First operand has 124 places, 89 transitions, 616 flow. Second operand 10 states and 359 transitions. [2024-11-12 16:29:05,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 118 transitions, 945 flow [2024-11-12 16:29:05,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 118 transitions, 896 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-11-12 16:29:05,300 INFO L231 Difference]: Finished difference. Result has 121 places, 88 transitions, 614 flow [2024-11-12 16:29:05,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=614, PETRI_PLACES=121, PETRI_TRANSITIONS=88} [2024-11-12 16:29:05,301 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-11-12 16:29:05,301 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 88 transitions, 614 flow [2024-11-12 16:29:05,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.4) internal successors, (456), 15 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:05,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:05,301 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:05,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 16:29:05,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:05,506 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:05,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1592873326, now seen corresponding path program 3 times [2024-11-12 16:29:05,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:05,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647104345] [2024-11-12 16:29:05,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:05,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647104345] [2024-11-12 16:29:05,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647104345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582912495] [2024-11-12 16:29:05,651 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:29:05,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:05,653 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:05,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 16:29:05,745 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:29:05,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:05,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 16:29:05,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:05,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:05,807 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:05,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:05,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:29:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:29:05,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:06,086 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 42 treesize of output 38 [2024-11-12 16:29:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:29:06,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582912495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:06,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:06,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-12 16:29:06,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235709236] [2024-11-12 16:29:06,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:06,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:29:06,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:29:06,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:29:06,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-12 16:29:06,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 88 transitions, 614 flow. Second operand has 22 states, 22 states have (on average 24.40909090909091) internal successors, (537), 22 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:06,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:06,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-12 16:29:06,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:09,040 INFO L124 PetriNetUnfolderBase]: 10336/15336 cut-off events. [2024-11-12 16:29:09,040 INFO L125 PetriNetUnfolderBase]: For 33861/35857 co-relation queries the response was YES. [2024-11-12 16:29:09,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57564 conditions, 15336 events. 10336/15336 cut-off events. For 33861/35857 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 91115 event pairs, 2299 based on Foata normal form. 324/15660 useless extension candidates. Maximal degree in co-relation 54058. Up to 2839 conditions per place. [2024-11-12 16:29:09,140 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 274 selfloop transitions, 37 changer transitions 0/320 dead transitions. [2024-11-12 16:29:09,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 320 transitions, 2526 flow [2024-11-12 16:29:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 16:29:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-12 16:29:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 715 transitions. [2024-11-12 16:29:09,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52689756816507 [2024-11-12 16:29:09,142 INFO L175 Difference]: Start difference. First operand has 121 places, 88 transitions, 614 flow. Second operand 23 states and 715 transitions. [2024-11-12 16:29:09,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 320 transitions, 2526 flow [2024-11-12 16:29:09,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 320 transitions, 2467 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-12 16:29:09,197 INFO L231 Difference]: Finished difference. Result has 140 places, 96 transitions, 748 flow [2024-11-12 16:29:09,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=748, PETRI_PLACES=140, PETRI_TRANSITIONS=96} [2024-11-12 16:29:09,198 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2024-11-12 16:29:09,198 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 96 transitions, 748 flow [2024-11-12 16:29:09,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.40909090909091) internal successors, (537), 22 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:09,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:09,199 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:09,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-12 16:29:09,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:09,404 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:09,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:09,404 INFO L85 PathProgramCache]: Analyzing trace with hash -682628513, now seen corresponding path program 2 times [2024-11-12 16:29:09,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:09,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646187182] [2024-11-12 16:29:09,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:09,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:09,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:09,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646187182] [2024-11-12 16:29:09,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646187182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:09,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625365038] [2024-11-12 16:29:09,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:09,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:09,710 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:09,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 16:29:09,900 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:29:09,900 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:09,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-12 16:29:09,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:09,907 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 [2024-11-12 16:29:10,000 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-12 16:29:10,001 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 20 treesize of output 22 [2024-11-12 16:29:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:10,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:10,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625365038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:10,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:10,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2024-11-12 16:29:10,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138180836] [2024-11-12 16:29:10,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:10,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 16:29:10,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:10,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 16:29:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2024-11-12 16:29:12,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-12 16:29:12,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 96 transitions, 748 flow. Second operand has 30 states, 30 states have (on average 24.233333333333334) internal successors, (727), 30 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:12,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:12,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-12 16:29:12,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:15,297 INFO L124 PetriNetUnfolderBase]: 8146/12058 cut-off events. [2024-11-12 16:29:15,298 INFO L125 PetriNetUnfolderBase]: For 90229/96237 co-relation queries the response was YES. [2024-11-12 16:29:15,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54161 conditions, 12058 events. 8146/12058 cut-off events. For 90229/96237 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 73098 event pairs, 1300 based on Foata normal form. 618/12558 useless extension candidates. Maximal degree in co-relation 50682. Up to 2609 conditions per place. [2024-11-12 16:29:15,379 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 270 selfloop transitions, 49 changer transitions 0/335 dead transitions. [2024-11-12 16:29:15,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 335 transitions, 3295 flow [2024-11-12 16:29:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-12 16:29:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-12 16:29:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 944 transitions. [2024-11-12 16:29:15,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-11-12 16:29:15,381 INFO L175 Difference]: Start difference. First operand has 140 places, 96 transitions, 748 flow. Second operand 33 states and 944 transitions. [2024-11-12 16:29:15,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 335 transitions, 3295 flow [2024-11-12 16:29:15,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 335 transitions, 3138 flow, removed 60 selfloop flow, removed 10 redundant places. [2024-11-12 16:29:15,422 INFO L231 Difference]: Finished difference. Result has 163 places, 116 transitions, 965 flow [2024-11-12 16:29:15,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=965, PETRI_PLACES=163, PETRI_TRANSITIONS=116} [2024-11-12 16:29:15,422 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 103 predicate places. [2024-11-12 16:29:15,422 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 116 transitions, 965 flow [2024-11-12 16:29:15,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 24.233333333333334) internal successors, (727), 30 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:15,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:15,423 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:15,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-12 16:29:15,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-12 16:29:15,624 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:15,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash -196098730, now seen corresponding path program 1 times [2024-11-12 16:29:15,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:15,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140563997] [2024-11-12 16:29:15,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:15,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:15,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140563997] [2024-11-12 16:29:15,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140563997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:15,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009886963] [2024-11-12 16:29:15,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:15,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:15,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:15,699 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:15,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 16:29:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:15,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:29:15,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:15,830 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:15,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009886963] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:15,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:29:15,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-12 16:29:15,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38084198] [2024-11-12 16:29:15,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:15,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:29:15,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:15,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:29:15,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-12 16:29:15,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:29:15,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 116 transitions, 965 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:15,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:15,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:29:15,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:17,313 INFO L124 PetriNetUnfolderBase]: 6948/11415 cut-off events. [2024-11-12 16:29:17,314 INFO L125 PetriNetUnfolderBase]: For 48635/49914 co-relation queries the response was YES. [2024-11-12 16:29:17,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49617 conditions, 11415 events. 6948/11415 cut-off events. For 48635/49914 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 78794 event pairs, 2716 based on Foata normal form. 344/11397 useless extension candidates. Maximal degree in co-relation 49533. Up to 5549 conditions per place. [2024-11-12 16:29:17,403 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 110 selfloop transitions, 13 changer transitions 0/143 dead transitions. [2024-11-12 16:29:17,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 143 transitions, 1391 flow [2024-11-12 16:29:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:29:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:29:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-11-12 16:29:17,405 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6271186440677966 [2024-11-12 16:29:17,405 INFO L175 Difference]: Start difference. First operand has 163 places, 116 transitions, 965 flow. Second operand 5 states and 185 transitions. [2024-11-12 16:29:17,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 143 transitions, 1391 flow [2024-11-12 16:29:17,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 143 transitions, 1284 flow, removed 14 selfloop flow, removed 20 redundant places. [2024-11-12 16:29:17,488 INFO L231 Difference]: Finished difference. Result has 147 places, 113 transitions, 866 flow [2024-11-12 16:29:17,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=147, PETRI_TRANSITIONS=113} [2024-11-12 16:29:17,488 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 87 predicate places. [2024-11-12 16:29:17,488 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 113 transitions, 866 flow [2024-11-12 16:29:17,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:17,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:17,489 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:17,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-12 16:29:17,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:17,689 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:17,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:17,690 INFO L85 PathProgramCache]: Analyzing trace with hash 313353444, now seen corresponding path program 1 times [2024-11-12 16:29:17,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:17,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039273050] [2024-11-12 16:29:17,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:17,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:17,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:17,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039273050] [2024-11-12 16:29:17,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039273050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:17,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567311991] [2024-11-12 16:29:17,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:17,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:17,992 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:17,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 16:29:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:18,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 16:29:18,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:18,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:18,636 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 36 treesize of output 32 [2024-11-12 16:29:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:18,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567311991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:18,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:18,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2024-11-12 16:29:18,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584733124] [2024-11-12 16:29:18,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:18,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-12 16:29:18,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-12 16:29:18,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-12 16:29:20,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-12 16:29:20,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 113 transitions, 866 flow. Second operand has 28 states, 28 states have (on average 29.25) internal successors, (819), 28 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:20,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:20,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-12 16:29:20,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:22,439 INFO L124 PetriNetUnfolderBase]: 6270/9905 cut-off events. [2024-11-12 16:29:22,439 INFO L125 PetriNetUnfolderBase]: For 65639/68676 co-relation queries the response was YES. [2024-11-12 16:29:22,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41813 conditions, 9905 events. 6270/9905 cut-off events. For 65639/68676 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 64310 event pairs, 1300 based on Foata normal form. 234/9793 useless extension candidates. Maximal degree in co-relation 41735. Up to 1380 conditions per place. [2024-11-12 16:29:22,499 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 305 selfloop transitions, 58 changer transitions 0/380 dead transitions. [2024-11-12 16:29:22,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 380 transitions, 3417 flow [2024-11-12 16:29:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-12 16:29:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-12 16:29:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1075 transitions. [2024-11-12 16:29:22,501 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6073446327683616 [2024-11-12 16:29:22,501 INFO L175 Difference]: Start difference. First operand has 147 places, 113 transitions, 866 flow. Second operand 30 states and 1075 transitions. [2024-11-12 16:29:22,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 380 transitions, 3417 flow [2024-11-12 16:29:22,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 380 transitions, 3267 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-12 16:29:22,530 INFO L231 Difference]: Finished difference. Result has 168 places, 119 transitions, 976 flow [2024-11-12 16:29:22,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=976, PETRI_PLACES=168, PETRI_TRANSITIONS=119} [2024-11-12 16:29:22,531 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 108 predicate places. [2024-11-12 16:29:22,531 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 119 transitions, 976 flow [2024-11-12 16:29:22,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.25) internal successors, (819), 28 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:22,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:22,532 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:22,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:22,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:22,733 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:22,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash -957927774, now seen corresponding path program 2 times [2024-11-12 16:29:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954017701] [2024-11-12 16:29:22,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:22,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:23,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:23,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954017701] [2024-11-12 16:29:23,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954017701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:23,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295074440] [2024-11-12 16:29:23,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:23,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:23,071 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:23,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 16:29:23,177 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:29:23,177 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:23,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-12 16:29:23,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:23,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:23,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:29:23,305 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:29:23,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-12 16:29:23,328 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:23,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-12 16:29:23,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-12 16:29:25,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295074440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:25,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:25,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2024-11-12 16:29:25,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942455711] [2024-11-12 16:29:25,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:25,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:29:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:25,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:29:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:29:26,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-12 16:29:26,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 119 transitions, 976 flow. Second operand has 22 states, 22 states have (on average 25.40909090909091) internal successors, (559), 22 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:26,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:26,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-12 16:29:26,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:30,785 INFO L124 PetriNetUnfolderBase]: 9924/14449 cut-off events. [2024-11-12 16:29:30,785 INFO L125 PetriNetUnfolderBase]: For 52905/54806 co-relation queries the response was YES. [2024-11-12 16:29:30,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60643 conditions, 14449 events. 9924/14449 cut-off events. For 52905/54806 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 87071 event pairs, 2376 based on Foata normal form. 200/14389 useless extension candidates. Maximal degree in co-relation 60558. Up to 2524 conditions per place. [2024-11-12 16:29:31,056 INFO L140 encePairwiseOnDemand]: 46/59 looper letters, 343 selfloop transitions, 50 changer transitions 0/408 dead transitions. [2024-11-12 16:29:31,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 408 transitions, 3615 flow [2024-11-12 16:29:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-12 16:29:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-12 16:29:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 824 transitions. [2024-11-12 16:29:31,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371577574967406 [2024-11-12 16:29:31,059 INFO L175 Difference]: Start difference. First operand has 168 places, 119 transitions, 976 flow. Second operand 26 states and 824 transitions. [2024-11-12 16:29:31,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 408 transitions, 3615 flow [2024-11-12 16:29:31,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 408 transitions, 3306 flow, removed 2 selfloop flow, removed 26 redundant places. [2024-11-12 16:29:31,129 INFO L231 Difference]: Finished difference. Result has 170 places, 132 transitions, 1095 flow [2024-11-12 16:29:31,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1095, PETRI_PLACES=170, PETRI_TRANSITIONS=132} [2024-11-12 16:29:31,130 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 110 predicate places. [2024-11-12 16:29:31,130 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 132 transitions, 1095 flow [2024-11-12 16:29:31,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 25.40909090909091) internal successors, (559), 22 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:31,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:31,131 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:31,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-12 16:29:31,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:31,331 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:31,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -535825138, now seen corresponding path program 1 times [2024-11-12 16:29:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:31,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313327658] [2024-11-12 16:29:31,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:29:31,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:31,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313327658] [2024-11-12 16:29:31,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313327658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:31,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:31,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:29:31,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563916262] [2024-11-12 16:29:31,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:31,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:31,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:31,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:31,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:29:31,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 132 transitions, 1095 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:31,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:31,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:29:31,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:32,428 INFO L124 PetriNetUnfolderBase]: 6536/10686 cut-off events. [2024-11-12 16:29:32,428 INFO L125 PetriNetUnfolderBase]: For 65241/68359 co-relation queries the response was YES. [2024-11-12 16:29:32,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43787 conditions, 10686 events. 6536/10686 cut-off events. For 65241/68359 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 73039 event pairs, 1908 based on Foata normal form. 390/10700 useless extension candidates. Maximal degree in co-relation 43707. Up to 4995 conditions per place. [2024-11-12 16:29:32,511 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 119 selfloop transitions, 21 changer transitions 0/163 dead transitions. [2024-11-12 16:29:32,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 163 transitions, 1675 flow [2024-11-12 16:29:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-12 16:29:32,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6483050847457628 [2024-11-12 16:29:32,512 INFO L175 Difference]: Start difference. First operand has 170 places, 132 transitions, 1095 flow. Second operand 4 states and 153 transitions. [2024-11-12 16:29:32,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 163 transitions, 1675 flow [2024-11-12 16:29:32,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 163 transitions, 1523 flow, removed 7 selfloop flow, removed 16 redundant places. [2024-11-12 16:29:32,545 INFO L231 Difference]: Finished difference. Result has 156 places, 129 transitions, 997 flow [2024-11-12 16:29:32,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=997, PETRI_PLACES=156, PETRI_TRANSITIONS=129} [2024-11-12 16:29:32,546 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 96 predicate places. [2024-11-12 16:29:32,546 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 129 transitions, 997 flow [2024-11-12 16:29:32,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:32,546 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:32,546 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:32,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-12 16:29:32,546 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:32,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 227059497, now seen corresponding path program 1 times [2024-11-12 16:29:32,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046107006] [2024-11-12 16:29:32,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:32,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:32,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046107006] [2024-11-12 16:29:32,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046107006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914101044] [2024-11-12 16:29:32,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:32,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:32,694 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:32,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 16:29:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:32,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:29:32,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:32,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:33,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914101044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:33,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:33,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-12 16:29:33,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523394852] [2024-11-12 16:29:33,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:33,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:29:33,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:33,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:29:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:29:33,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-12 16:29:33,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 129 transitions, 997 flow. Second operand has 20 states, 20 states have (on average 30.45) internal successors, (609), 20 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:33,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:33,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-12 16:29:33,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:34,374 INFO L124 PetriNetUnfolderBase]: 5142/8632 cut-off events. [2024-11-12 16:29:34,375 INFO L125 PetriNetUnfolderBase]: For 39693/40623 co-relation queries the response was YES. [2024-11-12 16:29:34,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35233 conditions, 8632 events. 5142/8632 cut-off events. For 39693/40623 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 58049 event pairs, 2488 based on Foata normal form. 355/8837 useless extension candidates. Maximal degree in co-relation 35158. Up to 3576 conditions per place. [2024-11-12 16:29:34,453 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 138 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-11-12 16:29:34,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 1883 flow [2024-11-12 16:29:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:29:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:29:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 432 transitions. [2024-11-12 16:29:34,454 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6101694915254238 [2024-11-12 16:29:34,454 INFO L175 Difference]: Start difference. First operand has 156 places, 129 transitions, 997 flow. Second operand 12 states and 432 transitions. [2024-11-12 16:29:34,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 1883 flow [2024-11-12 16:29:34,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 202 transitions, 1813 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:29:34,487 INFO L231 Difference]: Finished difference. Result has 167 places, 133 transitions, 1078 flow [2024-11-12 16:29:34,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1078, PETRI_PLACES=167, PETRI_TRANSITIONS=133} [2024-11-12 16:29:34,488 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 107 predicate places. [2024-11-12 16:29:34,488 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 133 transitions, 1078 flow [2024-11-12 16:29:34,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.45) internal successors, (609), 20 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:34,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:34,489 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:34,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:34,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-12 16:29:34,689 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:34,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1616142578, now seen corresponding path program 2 times [2024-11-12 16:29:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560763396] [2024-11-12 16:29:34,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-12 16:29:34,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560763396] [2024-11-12 16:29:34,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560763396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587025880] [2024-11-12 16:29:34,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:34,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:34,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:34,878 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:34,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-12 16:29:34,978 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:29:34,978 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:34,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 16:29:34,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:35,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:29:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-12 16:29:35,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-12 16:29:35,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587025880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:35,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:35,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2024-11-12 16:29:35,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649858368] [2024-11-12 16:29:35,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:35,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 16:29:35,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:35,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 16:29:35,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-11-12 16:29:36,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-12 16:29:36,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 133 transitions, 1078 flow. Second operand has 21 states, 21 states have (on average 28.952380952380953) internal successors, (608), 21 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:36,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:36,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-12 16:29:36,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:38,756 INFO L124 PetriNetUnfolderBase]: 9039/13791 cut-off events. [2024-11-12 16:29:38,756 INFO L125 PetriNetUnfolderBase]: For 65012/66550 co-relation queries the response was YES. [2024-11-12 16:29:38,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59596 conditions, 13791 events. 9039/13791 cut-off events. For 65012/66550 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 88863 event pairs, 1137 based on Foata normal form. 588/14225 useless extension candidates. Maximal degree in co-relation 51362. Up to 2762 conditions per place. [2024-11-12 16:29:38,878 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 302 selfloop transitions, 59 changer transitions 0/388 dead transitions. [2024-11-12 16:29:38,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 388 transitions, 3744 flow [2024-11-12 16:29:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-12 16:29:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-12 16:29:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 771 transitions. [2024-11-12 16:29:38,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939907550077042 [2024-11-12 16:29:38,880 INFO L175 Difference]: Start difference. First operand has 167 places, 133 transitions, 1078 flow. Second operand 22 states and 771 transitions. [2024-11-12 16:29:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 388 transitions, 3744 flow [2024-11-12 16:29:38,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 388 transitions, 3648 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-12 16:29:38,936 INFO L231 Difference]: Finished difference. Result has 179 places, 153 transitions, 1360 flow [2024-11-12 16:29:38,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1360, PETRI_PLACES=179, PETRI_TRANSITIONS=153} [2024-11-12 16:29:38,937 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 119 predicate places. [2024-11-12 16:29:38,937 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 153 transitions, 1360 flow [2024-11-12 16:29:38,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 28.952380952380953) internal successors, (608), 21 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:38,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:38,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:38,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:39,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-12 16:29:39,138 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:39,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:39,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1906435703, now seen corresponding path program 1 times [2024-11-12 16:29:39,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176423094] [2024-11-12 16:29:39,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:39,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176423094] [2024-11-12 16:29:39,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176423094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472547419] [2024-11-12 16:29:39,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:39,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:39,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:39,775 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:39,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-12 16:29:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:39,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-12 16:29:39,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:39,889 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 6 treesize of output 5 [2024-11-12 16:29:39,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-12 16:29:39,986 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:39,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:40,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 16:29:40,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-12 16:29:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:40,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:52,855 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-12 16:29:52,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1610 treesize of output 1180 [2024-11-12 16:29:52,910 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:52,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 642 treesize of output 600