./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-subst.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/chl-node-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:23:17,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:23:17,898 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:23:17,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:23:17,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:23:17,938 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:23:17,939 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:23:17,939 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:23:17,940 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:23:17,941 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:23:17,941 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:23:17,941 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:23:17,942 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:23:17,942 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:23:17,943 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:23:17,943 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:23:17,943 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:23:17,944 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:23:17,944 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:23:17,945 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:23:17,945 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:23:17,946 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:23:17,946 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:23:17,946 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:23:17,947 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:23:17,947 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:23:17,947 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:23:17,948 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:23:17,948 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:23:17,948 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:23:17,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:23:17,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:23:17,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:23:17,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:23:17,950 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:23:17,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:23:17,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:23:17,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:23:17,951 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:23:17,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:23:17,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:23:17,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:23:17,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2024-11-12 16:23:18,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:23:18,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:23:18,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:23:18,244 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:23:18,244 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:23:18,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-11-12 16:23:19,807 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:23:20,000 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:23:20,000 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-11-12 16:23:20,009 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce1fdfd8/f437567a544048d3a9947054516ae706/FLAGcab8cc884 [2024-11-12 16:23:20,374 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce1fdfd8/f437567a544048d3a9947054516ae706 [2024-11-12 16:23:20,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:23:20,378 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:23:20,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:23:20,382 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:23:20,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:23:20,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276c1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20, skipping insertion in model container [2024-11-12 16:23:20,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,427 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:23:20,665 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 16:23:20,673 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 16:23:20,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:23:20,690 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:23:20,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:23:20,745 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:23:20,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20 WrapperNode [2024-11-12 16:23:20,746 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:23:20,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:23:20,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:23:20,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:23:20,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,766 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,805 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 426 [2024-11-12 16:23:20,806 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:23:20,807 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:23:20,811 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:23:20,811 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:23:20,823 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,829 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,853 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 9, 15]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-11-12 16:23:20,854 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,854 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,878 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,893 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:23:20,895 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:23:20,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:23:20,895 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:23:20,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (1/1) ... [2024-11-12 16:23:20,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:23:20,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:20,936 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 16:23:20,941 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 16:23:21,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:23:21,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:23:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:23:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:23:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:23:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:23:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:23:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:23:21,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:23:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:23:21,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:23:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:23:21,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:23:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:23:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:23:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:23:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:23:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:23:21,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:23:21,009 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 16:23:21,157 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:23:21,160 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:23:21,977 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:23:21,978 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:23:22,515 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:23:22,516 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-12 16:23:22,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:23:22 BoogieIcfgContainer [2024-11-12 16:23:22,517 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:23:22,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:23:22,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:23:22,523 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:23:22,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:23:20" (1/3) ... [2024-11-12 16:23:22,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0eb741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:23:22, skipping insertion in model container [2024-11-12 16:23:22,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:23:20" (2/3) ... [2024-11-12 16:23:22,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0eb741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:23:22, skipping insertion in model container [2024-11-12 16:23:22,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:23:22" (3/3) ... [2024-11-12 16:23:22,527 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2024-11-12 16:23:22,548 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:23:22,548 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-12 16:23:22,549 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:23:22,634 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:23:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 261 flow [2024-11-12 16:23:22,730 INFO L124 PetriNetUnfolderBase]: 12/117 cut-off events. [2024-11-12 16:23:22,730 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:23:22,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 12/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 402 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-11-12 16:23:22,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 261 flow [2024-11-12 16:23:22,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 250 flow [2024-11-12 16:23:22,759 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:23:22,769 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;@33c410b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:23:22,770 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-11-12 16:23:22,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:23:22,776 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:23:22,777 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:23:22,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:22,778 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:23:22,778 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:22,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1324850, now seen corresponding path program 1 times [2024-11-12 16:23:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:22,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793541377] [2024-11-12 16:23:22,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:22,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:23,130 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 16:23:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793541377] [2024-11-12 16:23:23,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793541377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:23,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:23,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:23:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621855934] [2024-11-12 16:23:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:23,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:23:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:23:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:23:23,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:23,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 16:23:23,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:23,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:23,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:24,055 INFO L124 PetriNetUnfolderBase]: 2205/4833 cut-off events. [2024-11-12 16:23:24,055 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-11-12 16:23:24,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 4833 events. 2205/4833 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39081 event pairs, 1390 based on Foata normal form. 1/3721 useless extension candidates. Maximal degree in co-relation 7419. Up to 2942 conditions per place. [2024-11-12 16:23:24,116 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 48 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-12 16:23:24,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 340 flow [2024-11-12 16:23:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:23:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:23:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-12 16:23:24,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-12 16:23:24,178 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 250 flow. Second operand 3 states and 249 transitions. [2024-11-12 16:23:24,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 340 flow [2024-11-12 16:23:24,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:23:24,195 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 232 flow [2024-11-12 16:23:24,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-11-12 16:23:24,202 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2024-11-12 16:23:24,203 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 232 flow [2024-11-12 16:23:24,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 16:23:24,203 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:24,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:23:24,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:23:24,204 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:24,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:24,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1324851, now seen corresponding path program 1 times [2024-11-12 16:23:24,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:24,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372251248] [2024-11-12 16:23:24,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:24,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:24,603 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 16:23:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:24,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372251248] [2024-11-12 16:23:24,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372251248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:24,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:24,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:23:24,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117619990] [2024-11-12 16:23:24,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:24,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:23:24,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:23:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:23:24,723 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:24,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 16:23:24,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:24,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:24,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:25,365 INFO L124 PetriNetUnfolderBase]: 2205/4835 cut-off events. [2024-11-12 16:23:25,366 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-12 16:23:25,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7844 conditions, 4835 events. 2205/4835 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39072 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7809. Up to 2954 conditions per place. [2024-11-12 16:23:25,406 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 53 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-11-12 16:23:25,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 346 flow [2024-11-12 16:23:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:23:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:23:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-11-12 16:23:25,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-12 16:23:25,414 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 232 flow. Second operand 3 states and 252 transitions. [2024-11-12 16:23:25,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 346 flow [2024-11-12 16:23:25,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:23:25,417 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 242 flow [2024-11-12 16:23:25,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-11-12 16:23:25,419 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2024-11-12 16:23:25,419 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 242 flow [2024-11-12 16:23:25,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 16:23:25,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:25,420 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:23:25,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:23:25,421 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:25,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1273224688, now seen corresponding path program 1 times [2024-11-12 16:23:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:25,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748690365] [2024-11-12 16:23:25,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:25,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:25,698 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 16:23:25,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:25,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748690365] [2024-11-12 16:23:25,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748690365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:25,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341295181] [2024-11-12 16:23:25,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:25,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:25,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:25,703 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 16:23:25,705 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 16:23:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:25,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:23:25,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:25,894 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 16:23:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:23:26,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:26,230 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 16:23:26,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341295181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:26,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:26,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:23:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762632379] [2024-11-12 16:23:26,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:26,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:23:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:23:26,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:23:26,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:26,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 242 flow. Second operand has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 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 16:23:26,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:26,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:26,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:27,788 INFO L124 PetriNetUnfolderBase]: 2205/4834 cut-off events. [2024-11-12 16:23:27,789 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-12 16:23:27,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7846 conditions, 4834 events. 2205/4834 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39080 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7833. Up to 2950 conditions per place. [2024-11-12 16:23:27,834 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 49 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2024-11-12 16:23:27,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 348 flow [2024-11-12 16:23:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:23:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:23:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2024-11-12 16:23:27,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-12 16:23:27,837 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 242 flow. Second operand 5 states and 380 transitions. [2024-11-12 16:23:27,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 348 flow [2024-11-12 16:23:27,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 112 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:23:27,840 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 254 flow [2024-11-12 16:23:27,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-11-12 16:23:27,841 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2024-11-12 16:23:27,841 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 254 flow [2024-11-12 16:23:27,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 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 16:23:27,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:27,842 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:23:27,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 16:23:28,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:28,048 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:28,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:28,049 INFO L85 PathProgramCache]: Analyzing trace with hash 815261611, now seen corresponding path program 1 times [2024-11-12 16:23:28,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:28,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926007361] [2024-11-12 16:23:28,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:23:28,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:28,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926007361] [2024-11-12 16:23:28,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926007361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:28,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:28,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:23:28,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430319653] [2024-11-12 16:23:28,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:28,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:23:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:23:28,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:23:28,378 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:28,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 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 16:23:28,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:28,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:28,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:28,940 INFO L124 PetriNetUnfolderBase]: 2206/4837 cut-off events. [2024-11-12 16:23:28,941 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-12 16:23:28,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4837 events. 2206/4837 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39112 event pairs, 1390 based on Foata normal form. 0/3722 useless extension candidates. Maximal degree in co-relation 7831. Up to 2953 conditions per place. [2024-11-12 16:23:28,991 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 52 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-11-12 16:23:28,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 374 flow [2024-11-12 16:23:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:23:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:23:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2024-11-12 16:23:28,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-12 16:23:28,995 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 254 flow. Second operand 4 states and 318 transitions. [2024-11-12 16:23:28,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 374 flow [2024-11-12 16:23:28,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 364 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-12 16:23:29,000 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 269 flow [2024-11-12 16:23:29,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-11-12 16:23:29,004 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -4 predicate places. [2024-11-12 16:23:29,004 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 269 flow [2024-11-12 16:23:29,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 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 16:23:29,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:29,004 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:29,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:23:29,005 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:29,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash -496692954, now seen corresponding path program 1 times [2024-11-12 16:23:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:29,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534336316] [2024-11-12 16:23:29,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:29,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:23:29,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:29,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534336316] [2024-11-12 16:23:29,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534336316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:29,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:29,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:23:29,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097008657] [2024-11-12 16:23:29,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:29,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:23:29,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:23:29,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:23:29,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-12 16:23:29,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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 16:23:29,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:29,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-12 16:23:29,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:29,622 INFO L124 PetriNetUnfolderBase]: 2205/4836 cut-off events. [2024-11-12 16:23:29,623 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-12 16:23:29,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4836 events. 2205/4836 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39097 event pairs, 1390 based on Foata normal form. 1/3726 useless extension candidates. Maximal degree in co-relation 7832. Up to 2950 conditions per place. [2024-11-12 16:23:29,666 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 50 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2024-11-12 16:23:29,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 374 flow [2024-11-12 16:23:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:23:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:23:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-11-12 16:23:29,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-11-12 16:23:29,669 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 269 flow. Second operand 4 states and 327 transitions. [2024-11-12 16:23:29,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 374 flow [2024-11-12 16:23:29,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:23:29,672 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 268 flow [2024-11-12 16:23:29,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2024-11-12 16:23:29,673 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2024-11-12 16:23:29,673 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 268 flow [2024-11-12 16:23:29,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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 16:23:29,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:29,674 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:29,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:23:29,674 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:29,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:29,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1782402732, now seen corresponding path program 1 times [2024-11-12 16:23:29,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:29,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908536599] [2024-11-12 16:23:29,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:29,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:23:29,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:29,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908536599] [2024-11-12 16:23:29,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908536599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:29,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435096636] [2024-11-12 16:23:29,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:29,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:29,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:29,957 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 16:23:29,959 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 16:23:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:30,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:23:30,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:30,085 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 16:23:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:23:30,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:23:30,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435096636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:30,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:30,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:23:30,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14015872] [2024-11-12 16:23:30,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:30,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:23:30,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:23:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:23:31,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:31,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 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 16:23:31,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:31,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:31,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:32,038 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-11-12 16:23:32,038 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-12 16:23:32,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 4841 events. 2207/4841 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39141 event pairs, 1390 based on Foata normal form. 0/3729 useless extension candidates. Maximal degree in co-relation 7839. Up to 2946 conditions per place. [2024-11-12 16:23:32,085 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 45 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-11-12 16:23:32,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 416 flow [2024-11-12 16:23:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:23:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:23:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-11-12 16:23:32,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-12 16:23:32,087 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 268 flow. Second operand 9 states and 648 transitions. [2024-11-12 16:23:32,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 416 flow [2024-11-12 16:23:32,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:23:32,090 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 316 flow [2024-11-12 16:23:32,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-11-12 16:23:32,093 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-12 16:23:32,093 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 316 flow [2024-11-12 16:23:32,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 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 16:23:32,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:32,094 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:32,112 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 16:23:32,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-12 16:23:32,299 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:32,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:32,300 INFO L85 PathProgramCache]: Analyzing trace with hash -580089275, now seen corresponding path program 1 times [2024-11-12 16:23:32,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:32,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706239351] [2024-11-12 16:23:32,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:32,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:32,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706239351] [2024-11-12 16:23:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706239351] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:32,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:32,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:23:32,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676687483] [2024-11-12 16:23:32,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:32,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:23:32,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:23:32,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:23:32,723 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:32,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 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 16:23:32,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:32,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:32,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:33,302 INFO L124 PetriNetUnfolderBase]: 2207/4843 cut-off events. [2024-11-12 16:23:33,302 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-12 16:23:33,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 4843 events. 2207/4843 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39096 event pairs, 1390 based on Foata normal form. 0/3731 useless extension candidates. Maximal degree in co-relation 7850. Up to 2958 conditions per place. [2024-11-12 16:23:33,354 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 58 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-11-12 16:23:33,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 446 flow [2024-11-12 16:23:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:23:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:23:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-12 16:23:33,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-12 16:23:33,357 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 316 flow. Second operand 4 states and 317 transitions. [2024-11-12 16:23:33,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 446 flow [2024-11-12 16:23:33,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 121 transitions, 427 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-12 16:23:33,361 INFO L231 Difference]: Finished difference. Result has 116 places, 120 transitions, 320 flow [2024-11-12 16:23:33,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=116, PETRI_TRANSITIONS=120} [2024-11-12 16:23:33,362 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-11-12 16:23:33,363 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 120 transitions, 320 flow [2024-11-12 16:23:33,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 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 16:23:33,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:33,363 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:33,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:23:33,363 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:33,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash 879998184, now seen corresponding path program 1 times [2024-11-12 16:23:33,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:33,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186577149] [2024-11-12 16:23:33,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:33,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:33,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:33,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186577149] [2024-11-12 16:23:33,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186577149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:33,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931586165] [2024-11-12 16:23:33,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:33,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:33,670 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 16:23:33,672 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 16:23:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:33,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:23:33,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:33,839 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 16:23:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:33,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:34,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931586165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:34,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:34,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:23:34,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920611018] [2024-11-12 16:23:34,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:34,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:23:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:23:34,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:23:34,796 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:34,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 120 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 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 16:23:34,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:34,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:34,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:35,477 INFO L124 PetriNetUnfolderBase]: 2208/4845 cut-off events. [2024-11-12 16:23:35,477 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-12 16:23:35,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7902 conditions, 4845 events. 2208/4845 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39091 event pairs, 1390 based on Foata normal form. 0/3733 useless extension candidates. Maximal degree in co-relation 7857. Up to 2950 conditions per place. [2024-11-12 16:23:35,517 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 47 selfloop transitions, 18 changer transitions 0/123 dead transitions. [2024-11-12 16:23:35,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 458 flow [2024-11-12 16:23:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:23:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:23:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 647 transitions. [2024-11-12 16:23:35,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5990740740740741 [2024-11-12 16:23:35,520 INFO L175 Difference]: Start difference. First operand has 116 places, 120 transitions, 320 flow. Second operand 9 states and 647 transitions. [2024-11-12 16:23:35,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 458 flow [2024-11-12 16:23:35,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:23:35,523 INFO L231 Difference]: Finished difference. Result has 121 places, 123 transitions, 359 flow [2024-11-12 16:23:35,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=359, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2024-11-12 16:23:35,524 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2024-11-12 16:23:35,524 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 359 flow [2024-11-12 16:23:35,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 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 16:23:35,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:35,525 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:35,543 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 16:23:35,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:35,726 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:35,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:35,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143368, now seen corresponding path program 1 times [2024-11-12 16:23:35,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:35,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823722681] [2024-11-12 16:23:35,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:35,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:36,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:36,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823722681] [2024-11-12 16:23:36,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823722681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:36,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121890039] [2024-11-12 16:23:36,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:36,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:36,002 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 16:23:36,004 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 16:23:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:36,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:23:36,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:36,171 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 16:23:36,178 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 16:23:36,179 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:23:36,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121890039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:36,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:23:36,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-12 16:23:36,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749194168] [2024-11-12 16:23:36,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:36,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:23:36,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:23:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:23:36,239 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:36,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 359 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 16:23:36,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:36,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:36,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:36,716 INFO L124 PetriNetUnfolderBase]: 2209/4849 cut-off events. [2024-11-12 16:23:36,716 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-12 16:23:36,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7928 conditions, 4849 events. 2209/4849 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39132 event pairs, 1390 based on Foata normal form. 0/3736 useless extension candidates. Maximal degree in co-relation 7876. Up to 2968 conditions per place. [2024-11-12 16:23:36,754 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 66 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2024-11-12 16:23:36,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 126 transitions, 507 flow [2024-11-12 16:23:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:23:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:23:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-12 16:23:36,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-12 16:23:36,756 INFO L175 Difference]: Start difference. First operand has 121 places, 123 transitions, 359 flow. Second operand 4 states and 317 transitions. [2024-11-12 16:23:36,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 126 transitions, 507 flow [2024-11-12 16:23:36,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 482 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-12 16:23:36,759 INFO L231 Difference]: Finished difference. Result has 121 places, 125 transitions, 358 flow [2024-11-12 16:23:36,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=121, PETRI_TRANSITIONS=125} [2024-11-12 16:23:36,760 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2024-11-12 16:23:36,760 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 125 transitions, 358 flow [2024-11-12 16:23:36,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 16:23:36,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:36,761 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:36,779 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 16:23:36,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:36,962 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:36,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143367, now seen corresponding path program 1 times [2024-11-12 16:23:36,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:36,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209834165] [2024-11-12 16:23:36,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:37,031 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 16:23:37,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209834165] [2024-11-12 16:23:37,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209834165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:37,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:37,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:23:37,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207810180] [2024-11-12 16:23:37,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:37,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:23:37,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:23:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:23:37,076 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:37,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 16:23:37,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:37,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:37,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:37,605 INFO L124 PetriNetUnfolderBase]: 2209/4845 cut-off events. [2024-11-12 16:23:37,606 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-12 16:23:37,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7918 conditions, 4845 events. 2209/4845 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39175 event pairs, 1390 based on Foata normal form. 2/3737 useless extension candidates. Maximal degree in co-relation 7869. Up to 2956 conditions per place. [2024-11-12 16:23:37,651 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 64 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-12 16:23:37,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 122 transitions, 486 flow [2024-11-12 16:23:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:23:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:23:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2024-11-12 16:23:37,653 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-11-12 16:23:37,653 INFO L175 Difference]: Start difference. First operand has 121 places, 125 transitions, 358 flow. Second operand 3 states and 248 transitions. [2024-11-12 16:23:37,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 122 transitions, 486 flow [2024-11-12 16:23:37,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:23:37,657 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 352 flow [2024-11-12 16:23:37,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-11-12 16:23:37,658 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 4 predicate places. [2024-11-12 16:23:37,658 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 352 flow [2024-11-12 16:23:37,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 16:23:37,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:37,659 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:37,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:23:37,659 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:37,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:37,660 INFO L85 PathProgramCache]: Analyzing trace with hash -430193655, now seen corresponding path program 1 times [2024-11-12 16:23:37,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:37,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989874736] [2024-11-12 16:23:37,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:37,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:37,763 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 16:23:37,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:37,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989874736] [2024-11-12 16:23:37,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989874736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:37,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:37,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:23:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149864503] [2024-11-12 16:23:37,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:37,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:23:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:37,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:23:37,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:23:37,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-12 16:23:37,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 16:23:37,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:37,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-12 16:23:37,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:38,241 INFO L124 PetriNetUnfolderBase]: 2208/4844 cut-off events. [2024-11-12 16:23:38,241 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-12 16:23:38,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7915 conditions, 4844 events. 2208/4844 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 39174 event pairs, 1390 based on Foata normal form. 1/3736 useless extension candidates. Maximal degree in co-relation 7867. Up to 2964 conditions per place. [2024-11-12 16:23:38,269 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 63 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2024-11-12 16:23:38,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 122 transitions, 484 flow [2024-11-12 16:23:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:23:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:23:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-12 16:23:38,272 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-12 16:23:38,272 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 352 flow. Second operand 4 states and 325 transitions. [2024-11-12 16:23:38,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 122 transitions, 484 flow [2024-11-12 16:23:38,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 122 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:23:38,274 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 350 flow [2024-11-12 16:23:38,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-11-12 16:23:38,275 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-11-12 16:23:38,275 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 350 flow [2024-11-12 16:23:38,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 16:23:38,276 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:38,276 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:38,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:23:38,276 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:38,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:38,277 INFO L85 PathProgramCache]: Analyzing trace with hash -451124234, now seen corresponding path program 1 times [2024-11-12 16:23:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:38,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629050477] [2024-11-12 16:23:38,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:38,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629050477] [2024-11-12 16:23:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629050477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742596211] [2024-11-12 16:23:38,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:38,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:38,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:38,433 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 16:23:38,435 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 16:23:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:38,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:23:38,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:38,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:38,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742596211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:38,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:38,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:23:38,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981620624] [2024-11-12 16:23:38,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:38,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:23:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:23:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:23:38,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-12 16:23:38,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 350 flow. Second operand has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 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 16:23:38,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:38,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-12 16:23:38,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:39,824 INFO L124 PetriNetUnfolderBase]: 4402/9628 cut-off events. [2024-11-12 16:23:39,824 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-12 16:23:39,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15715 conditions, 9628 events. 4402/9628 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 87455 event pairs, 2784 based on Foata normal form. 1/7507 useless extension candidates. Maximal degree in co-relation 7860. Up to 2944 conditions per place. [2024-11-12 16:23:39,888 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 88 selfloop transitions, 34 changer transitions 0/177 dead transitions. [2024-11-12 16:23:39,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 758 flow [2024-11-12 16:23:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:23:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:23:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2024-11-12 16:23:39,890 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-11-12 16:23:39,890 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 350 flow. Second operand 9 states and 716 transitions. [2024-11-12 16:23:39,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 758 flow [2024-11-12 16:23:39,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 744 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:23:39,894 INFO L231 Difference]: Finished difference. Result has 128 places, 139 transitions, 540 flow [2024-11-12 16:23:39,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=128, PETRI_TRANSITIONS=139} [2024-11-12 16:23:39,895 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 14 predicate places. [2024-11-12 16:23:39,895 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 139 transitions, 540 flow [2024-11-12 16:23:39,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 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 16:23:39,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:39,896 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:39,913 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 16:23:40,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-12 16:23:40,097 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:40,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:40,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1099947173, now seen corresponding path program 1 times [2024-11-12 16:23:40,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533130506] [2024-11-12 16:23:40,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:23:40,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:40,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533130506] [2024-11-12 16:23:40,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533130506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:40,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067926849] [2024-11-12 16:23:40,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:40,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:40,397 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 16:23:40,399 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 16:23:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:40,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:23:40,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:40,564 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 16:23:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:23:40,579 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:23:40,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067926849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:40,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:23:40,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-12 16:23:40,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883049101] [2024-11-12 16:23:40,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:40,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:23:40,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:40,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:23:40,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:23:40,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:40,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 139 transitions, 540 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 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 16:23:40,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:40,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:40,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:41,502 INFO L124 PetriNetUnfolderBase]: 4414/9682 cut-off events. [2024-11-12 16:23:41,503 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-12 16:23:41,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15852 conditions, 9682 events. 4414/9682 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 87989 event pairs, 2780 based on Foata normal form. 0/7461 useless extension candidates. Maximal degree in co-relation 7899. Up to 5930 conditions per place. [2024-11-12 16:23:41,559 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 85 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2024-11-12 16:23:41,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 142 transitions, 726 flow [2024-11-12 16:23:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:23:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:23:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-12 16:23:41,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-12 16:23:41,562 INFO L175 Difference]: Start difference. First operand has 128 places, 139 transitions, 540 flow. Second operand 4 states and 317 transitions. [2024-11-12 16:23:41,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 142 transitions, 726 flow [2024-11-12 16:23:41,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 142 transitions, 722 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-12 16:23:41,566 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 560 flow [2024-11-12 16:23:41,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=560, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-11-12 16:23:41,566 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 17 predicate places. [2024-11-12 16:23:41,567 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 560 flow [2024-11-12 16:23:41,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 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 16:23:41,567 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:41,567 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:41,580 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 16:23:41,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:41,768 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:41,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash 261377450, now seen corresponding path program 1 times [2024-11-12 16:23:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:41,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993561345] [2024-11-12 16:23:41,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:23:41,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:41,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993561345] [2024-11-12 16:23:41,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993561345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:41,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:41,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:23:41,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772796006] [2024-11-12 16:23:41,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:41,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:23:41,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:23:41,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:23:41,915 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-12 16:23:41,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 560 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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 16:23:41,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:41,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-12 16:23:41,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:42,570 INFO L124 PetriNetUnfolderBase]: 4412/9680 cut-off events. [2024-11-12 16:23:42,570 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-12 16:23:42,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15856 conditions, 9680 events. 4412/9680 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 87907 event pairs, 2780 based on Foata normal form. 2/7470 useless extension candidates. Maximal degree in co-relation 7900. Up to 5923 conditions per place. [2024-11-12 16:23:42,628 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 82 selfloop transitions, 4 changer transitions 0/141 dead transitions. [2024-11-12 16:23:42,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 141 transitions, 729 flow [2024-11-12 16:23:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:23:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:23:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-12 16:23:42,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-12 16:23:42,629 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 560 flow. Second operand 4 states and 325 transitions. [2024-11-12 16:23:42,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 141 transitions, 729 flow [2024-11-12 16:23:42,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 141 transitions, 724 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:23:42,632 INFO L231 Difference]: Finished difference. Result has 132 places, 140 transitions, 558 flow [2024-11-12 16:23:42,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=558, PETRI_PLACES=132, PETRI_TRANSITIONS=140} [2024-11-12 16:23:42,633 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 18 predicate places. [2024-11-12 16:23:42,633 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 140 transitions, 558 flow [2024-11-12 16:23:42,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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 16:23:42,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:42,634 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:42,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-12 16:23:42,634 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:42,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:42,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1364202777, now seen corresponding path program 2 times [2024-11-12 16:23:42,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:42,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521365909] [2024-11-12 16:23:42,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:42,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:23:42,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:42,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521365909] [2024-11-12 16:23:42,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521365909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:42,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799164275] [2024-11-12 16:23:42,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:23:42,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:42,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:42,936 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 16:23:42,938 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 16:23:43,044 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:23:43,044 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:23:43,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 16:23:43,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:43,076 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 7 [2024-11-12 16:23:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:43,172 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:43,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799164275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:43,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:43,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-12 16:23:43,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238540400] [2024-11-12 16:23:43,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:43,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:23:43,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:23:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:23:44,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:44,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 140 transitions, 558 flow. Second operand has 18 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 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 16:23:44,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:44,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:44,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:46,247 INFO L124 PetriNetUnfolderBase]: 6608/14471 cut-off events. [2024-11-12 16:23:46,247 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-12 16:23:46,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23721 conditions, 14471 events. 6608/14471 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 139314 event pairs, 4174 based on Foata normal form. 1/11245 useless extension candidates. Maximal degree in co-relation 7901. Up to 5917 conditions per place. [2024-11-12 16:23:46,344 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 117 selfloop transitions, 36 changer transitions 0/205 dead transitions. [2024-11-12 16:23:46,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 205 transitions, 1135 flow [2024-11-12 16:23:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 16:23:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 16:23:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1221 transitions. [2024-11-12 16:23:46,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5985294117647059 [2024-11-12 16:23:46,349 INFO L175 Difference]: Start difference. First operand has 132 places, 140 transitions, 558 flow. Second operand 17 states and 1221 transitions. [2024-11-12 16:23:46,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 205 transitions, 1135 flow [2024-11-12 16:23:46,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 205 transitions, 1123 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:23:46,355 INFO L231 Difference]: Finished difference. Result has 147 places, 162 transitions, 831 flow [2024-11-12 16:23:46,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=831, PETRI_PLACES=147, PETRI_TRANSITIONS=162} [2024-11-12 16:23:46,356 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 33 predicate places. [2024-11-12 16:23:46,356 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 162 transitions, 831 flow [2024-11-12 16:23:46,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 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 16:23:46,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:46,357 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:46,370 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 16:23:46,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:46,558 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:46,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash -487233991, now seen corresponding path program 1 times [2024-11-12 16:23:46,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:46,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567034746] [2024-11-12 16:23:46,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:23:46,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567034746] [2024-11-12 16:23:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567034746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615405337] [2024-11-12 16:23:46,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:46,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:46,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:46,694 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 16:23:46,696 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 16:23:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:46,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:23:46,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:23:46,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:23:46,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615405337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:46,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:46,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-12 16:23:46,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839695414] [2024-11-12 16:23:46,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:46,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:23:46,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:23:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:23:47,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-12 16:23:47,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 162 transitions, 831 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 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 16:23:47,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:47,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-12 16:23:47,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:49,659 INFO L124 PetriNetUnfolderBase]: 13193/28849 cut-off events. [2024-11-12 16:23:49,659 INFO L125 PetriNetUnfolderBase]: For 245/245 co-relation queries the response was YES. [2024-11-12 16:23:49,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47256 conditions, 28849 events. 13193/28849 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 309078 event pairs, 8352 based on Foata normal form. 3/22508 useless extension candidates. Maximal degree in co-relation 15777. Up to 8831 conditions per place. [2024-11-12 16:23:49,847 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 120 selfloop transitions, 62 changer transitions 0/236 dead transitions. [2024-11-12 16:23:49,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 236 transitions, 1598 flow [2024-11-12 16:23:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:23:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:23:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2024-11-12 16:23:49,849 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6601851851851852 [2024-11-12 16:23:49,850 INFO L175 Difference]: Start difference. First operand has 147 places, 162 transitions, 831 flow. Second operand 9 states and 713 transitions. [2024-11-12 16:23:49,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 236 transitions, 1598 flow [2024-11-12 16:23:49,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 236 transitions, 1516 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-12 16:23:49,855 INFO L231 Difference]: Finished difference. Result has 154 places, 185 transitions, 1184 flow [2024-11-12 16:23:49,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1184, PETRI_PLACES=154, PETRI_TRANSITIONS=185} [2024-11-12 16:23:49,856 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 40 predicate places. [2024-11-12 16:23:49,856 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 185 transitions, 1184 flow [2024-11-12 16:23:49,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 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 16:23:49,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:49,857 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:49,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 16:23:50,057 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,SelfDestructingSolverStorable15 [2024-11-12 16:23:50,057 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:50,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2075616908, now seen corresponding path program 1 times [2024-11-12 16:23:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:50,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479223140] [2024-11-12 16:23:50,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:50,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:23:50,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:50,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479223140] [2024-11-12 16:23:50,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479223140] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:50,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:50,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:23:50,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213715944] [2024-11-12 16:23:50,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:50,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:23:50,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:23:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:23:50,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:50,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 185 transitions, 1184 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 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 16:23:50,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:50,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:50,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:52,935 INFO L124 PetriNetUnfolderBase]: 13223/29005 cut-off events. [2024-11-12 16:23:52,935 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2024-11-12 16:23:53,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47555 conditions, 29005 events. 13223/29005 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 311462 event pairs, 8340 based on Foata normal form. 0/22365 useless extension candidates. Maximal degree in co-relation 16234. Up to 17749 conditions per place. [2024-11-12 16:23:53,129 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 131 selfloop transitions, 4 changer transitions 0/187 dead transitions. [2024-11-12 16:23:53,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 187 transitions, 1458 flow [2024-11-12 16:23:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:23:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:23:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2024-11-12 16:23:53,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-11-12 16:23:53,131 INFO L175 Difference]: Start difference. First operand has 154 places, 185 transitions, 1184 flow. Second operand 4 states and 316 transitions. [2024-11-12 16:23:53,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 187 transitions, 1458 flow [2024-11-12 16:23:53,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 187 transitions, 1456 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-12 16:23:53,140 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 1201 flow [2024-11-12 16:23:53,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1201, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2024-11-12 16:23:53,141 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 44 predicate places. [2024-11-12 16:23:53,141 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 1201 flow [2024-11-12 16:23:53,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 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 16:23:53,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:53,141 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:53,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 16:23:53,142 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:53,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash 560678040, now seen corresponding path program 2 times [2024-11-12 16:23:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:53,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011550912] [2024-11-12 16:23:53,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:23:53,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:53,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011550912] [2024-11-12 16:23:53,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011550912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:53,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680401436] [2024-11-12 16:23:53,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:23:53,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:53,456 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 16:23:53,458 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 16:23:53,579 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:23:53,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:23:53,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 16:23:53,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:53,613 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 7 [2024-11-12 16:23:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:23:53,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:23:53,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680401436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:53,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:53,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-12 16:23:53,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263043671] [2024-11-12 16:23:53,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:53,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:23:53,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:53,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:23:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:23:54,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:23:54,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 1201 flow. Second operand has 18 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 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 16:23:54,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:54,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:23:54,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:59,276 INFO L124 PetriNetUnfolderBase]: 19804/43356 cut-off events. [2024-11-12 16:23:59,277 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-11-12 16:23:59,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71134 conditions, 43356 events. 19804/43356 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 2084. Compared 488225 event pairs, 12522 based on Foata normal form. 3/33701 useless extension candidates. Maximal degree in co-relation 24246. Up to 17722 conditions per place. [2024-11-12 16:23:59,684 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 157 selfloop transitions, 64 changer transitions 0/273 dead transitions. [2024-11-12 16:23:59,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 2189 flow [2024-11-12 16:23:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 16:23:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 16:23:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1216 transitions. [2024-11-12 16:23:59,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.596078431372549 [2024-11-12 16:23:59,688 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 1201 flow. Second operand 17 states and 1216 transitions. [2024-11-12 16:23:59,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 2189 flow [2024-11-12 16:23:59,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 273 transitions, 2182 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:23:59,700 INFO L231 Difference]: Finished difference. Result has 174 places, 224 transitions, 1812 flow [2024-11-12 16:23:59,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1812, PETRI_PLACES=174, PETRI_TRANSITIONS=224} [2024-11-12 16:23:59,701 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 60 predicate places. [2024-11-12 16:23:59,701 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 224 transitions, 1812 flow [2024-11-12 16:23:59,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 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 16:23:59,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:59,702 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 16:23:59,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:23:59,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 16:23:59,903 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:23:59,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:59,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1803065764, now seen corresponding path program 1 times [2024-11-12 16:23:59,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:59,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25484774] [2024-11-12 16:23:59,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:59,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:24:00,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:24:00,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25484774] [2024-11-12 16:24:00,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25484774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:24:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016592978] [2024-11-12 16:24:00,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:00,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:24:00,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:24:00,111 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 16:24:00,112 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 16:24:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:00,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:24:00,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:24:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:24:00,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:24:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:24:00,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016592978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:24:00,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:24:00,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-12 16:24:00,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901248246] [2024-11-12 16:24:00,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:24:00,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:24:00,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:24:00,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:24:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:24:00,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-12 16:24:00,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 224 transitions, 1812 flow. Second operand has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 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 16:24:00,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:24:00,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-12 16:24:00,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:24:09,205 INFO L124 PetriNetUnfolderBase]: 39538/86424 cut-off events. [2024-11-12 16:24:09,206 INFO L125 PetriNetUnfolderBase]: For 842/842 co-relation queries the response was YES. [2024-11-12 16:24:09,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141427 conditions, 86424 events. 39538/86424 cut-off events. For 842/842 co-relation queries the response was YES. Maximal size of possible extension queue 4089. Compared 1063950 event pairs, 25056 based on Foata normal form. 9/67425 useless extension candidates. Maximal degree in co-relation 47785. Up to 26472 conditions per place. [2024-11-12 16:24:10,198 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 156 selfloop transitions, 81 changer transitions 0/290 dead transitions. [2024-11-12 16:24:10,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 290 transitions, 2624 flow [2024-11-12 16:24:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:24:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:24:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 641 transitions. [2024-11-12 16:24:10,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6677083333333333 [2024-11-12 16:24:10,200 INFO L175 Difference]: Start difference. First operand has 174 places, 224 transitions, 1812 flow. Second operand 8 states and 641 transitions. [2024-11-12 16:24:10,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 290 transitions, 2624 flow [2024-11-12 16:24:10,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 290 transitions, 2490 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-11-12 16:24:10,212 INFO L231 Difference]: Finished difference. Result has 177 places, 229 transitions, 1950 flow [2024-11-12 16:24:10,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1950, PETRI_PLACES=177, PETRI_TRANSITIONS=229} [2024-11-12 16:24:10,213 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 63 predicate places. [2024-11-12 16:24:10,213 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 1950 flow [2024-11-12 16:24:10,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 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 16:24:10,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:24:10,214 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:24:10,231 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 16:24:10,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:24:10,418 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-12 16:24:10,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:24:10,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1162836769, now seen corresponding path program 2 times [2024-11-12 16:24:10,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:24:10,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881653313] [2024-11-12 16:24:10,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:10,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:24:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:10,733 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 16:24:10,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:24:10,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881653313] [2024-11-12 16:24:10,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881653313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:24:10,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340112463] [2024-11-12 16:24:10,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:24:10,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:24:10,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:24:10,736 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 16:24:10,737 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 16:24:10,876 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:24:10,876 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:24:10,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 16:24:10,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:24:10,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:24:10,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-12 16:24:11,077 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 16:24:11,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:24:11,241 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 16:24:11,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340112463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:24:11,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:24:11,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2024-11-12 16:24:11,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764589462] [2024-11-12 16:24:11,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:24:11,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:24:11,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:24:11,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:24:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:24:12,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-12 16:24:12,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 229 transitions, 1950 flow. Second operand has 22 states, 22 states have (on average 68.0) internal successors, (1496), 22 states have internal predecessors, (1496), 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 16:24:12,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:24:12,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-12 16:24:12,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand