./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:38:38,202 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:38:38,275 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:38:38,280 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:38:38,282 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:38:38,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:38:38,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:38:38,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:38:38,311 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:38:38,312 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:38:38,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:38:38,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:38:38,313 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:38:38,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:38:38,315 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:38:38,315 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:38:38,315 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:38:38,316 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:38:38,316 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:38:38,316 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:38:38,316 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:38:38,320 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:38:38,320 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:38:38,321 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:38:38,321 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:38:38,321 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:38:38,321 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:38:38,321 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:38:38,322 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:38:38,322 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:38:38,322 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:38:38,322 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:38:38,322 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:38:38,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:38:38,323 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:38:38,323 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:38:38,323 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:38:38,323 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:38:38,323 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:38:38,323 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:38:38,324 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:38:38,324 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:38:38,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-11-17 03:38:38,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:38:38,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:38:38,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:38:38,747 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:38:38,748 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:38:38,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-17 03:38:40,260 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:38:40,453 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:38:40,454 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-17 03:38:40,461 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19cadba86/90865bb491004ac985ebce8426b3d180/FLAGfd6610bb9 [2024-11-17 03:38:40,474 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19cadba86/90865bb491004ac985ebce8426b3d180 [2024-11-17 03:38:40,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:38:40,478 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:38:40,479 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:38:40,480 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:38:40,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:38:40,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4baa9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40, skipping insertion in model container [2024-11-17 03:38:40,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,511 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:38:40,671 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:38:40,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:38:40,685 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:38:40,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:38:40,731 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:38:40,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40 WrapperNode [2024-11-17 03:38:40,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:38:40,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:38:40,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:38:40,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:38:40,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,749 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,804 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 331 [2024-11-17 03:38:40,805 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:38:40,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:38:40,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:38:40,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:38:40,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,838 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,868 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-17 03:38:40,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,888 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,906 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:38:40,907 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:38:40,907 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:38:40,907 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:38:40,908 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (1/1) ... [2024-11-17 03:38:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:38:40,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:40,994 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) [2024-11-17 03:38:41,001 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 [2024-11-17 03:38:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:38:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:38:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:38:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:38:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:38:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:38:41,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:38:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:38:41,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:38:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:38:41,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:38:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 03:38:41,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 03:38:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:38:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:38:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:38:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:38:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:38:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:38:41,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:38:41,042 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:38:41,243 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:38:41,246 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:38:41,621 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:38:41,622 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:38:41,928 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:38:41,928 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:38:41,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:38:41 BoogieIcfgContainer [2024-11-17 03:38:41,929 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:38:41,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:38:41,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:38:41,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:38:41,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:38:40" (1/3) ... [2024-11-17 03:38:41,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765bac35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:41, skipping insertion in model container [2024-11-17 03:38:41,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:40" (2/3) ... [2024-11-17 03:38:41,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765bac35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:41, skipping insertion in model container [2024-11-17 03:38:41,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:38:41" (3/3) ... [2024-11-17 03:38:41,935 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2024-11-17 03:38:41,948 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:38:41,948 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-17 03:38:41,949 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:38:42,007 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:38:42,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 96 transitions, 220 flow [2024-11-17 03:38:42,073 INFO L124 PetriNetUnfolderBase]: 14/92 cut-off events. [2024-11-17 03:38:42,073 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 03:38:42,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 92 events. 14/92 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 243 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2024-11-17 03:38:42,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 96 transitions, 220 flow [2024-11-17 03:38:42,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 91 transitions, 206 flow [2024-11-17 03:38:42,090 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:38:42,095 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;@7c9c2edb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:38:42,095 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-17 03:38:42,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:38:42,098 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:38:42,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:38:42,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:42,099 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:38:42,099 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:42,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash 29694754, now seen corresponding path program 1 times [2024-11-17 03:38:42,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:42,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180759544] [2024-11-17 03:38:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:42,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180759544] [2024-11-17 03:38:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180759544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:42,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:42,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:38:42,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406755356] [2024-11-17 03:38:42,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:42,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:38:42,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:38:42,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:38:42,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-17 03:38:42,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 91 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2024-11-17 03:38:42,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:42,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-17 03:38:42,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:44,729 INFO L124 PetriNetUnfolderBase]: 19650/27347 cut-off events. [2024-11-17 03:38:44,730 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-11-17 03:38:44,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54107 conditions, 27347 events. 19650/27347 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 1999. Compared 194976 event pairs, 16460 based on Foata normal form. 3191/19651 useless extension candidates. Maximal degree in co-relation 51188. Up to 25501 conditions per place. [2024-11-17 03:38:44,894 INFO L140 encePairwiseOnDemand]: 81/96 looper letters, 49 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-11-17 03:38:44,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 280 flow [2024-11-17 03:38:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:38:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:38:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-17 03:38:44,903 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-11-17 03:38:44,904 INFO L175 Difference]: Start difference. First operand has 90 places, 91 transitions, 206 flow. Second operand 3 states and 157 transitions. [2024-11-17 03:38:44,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 280 flow [2024-11-17 03:38:45,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 77 transitions, 264 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:38:45,295 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 166 flow [2024-11-17 03:38:45,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2024-11-17 03:38:45,299 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -13 predicate places. [2024-11-17 03:38:45,300 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 166 flow [2024-11-17 03:38:45,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2024-11-17 03:38:45,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:45,301 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:38:45,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:38:45,302 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:45,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash 29694755, now seen corresponding path program 1 times [2024-11-17 03:38:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:45,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133130288] [2024-11-17 03:38:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133130288] [2024-11-17 03:38:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133130288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:45,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:45,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:38:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340435402] [2024-11-17 03:38:45,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:45,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:45,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-17 03:38:45,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2024-11-17 03:38:45,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:45,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-17 03:38:45,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:47,887 INFO L124 PetriNetUnfolderBase]: 19651/27352 cut-off events. [2024-11-17 03:38:47,887 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:38:47,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53329 conditions, 27352 events. 19651/27352 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 1999. Compared 194450 event pairs, 16460 based on Foata normal form. 0/16462 useless extension candidates. Maximal degree in co-relation 53284. Up to 25514 conditions per place. [2024-11-17 03:38:48,071 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 53 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2024-11-17 03:38:48,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 286 flow [2024-11-17 03:38:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-17 03:38:48,074 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2024-11-17 03:38:48,074 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 166 flow. Second operand 4 states and 182 transitions. [2024-11-17 03:38:48,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 286 flow [2024-11-17 03:38:48,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:48,077 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 189 flow [2024-11-17 03:38:48,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-11-17 03:38:48,078 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -10 predicate places. [2024-11-17 03:38:48,078 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 189 flow [2024-11-17 03:38:48,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2024-11-17 03:38:48,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:48,078 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:38:48,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:38:48,079 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:48,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:48,079 INFO L85 PathProgramCache]: Analyzing trace with hash -125900122, now seen corresponding path program 1 times [2024-11-17 03:38:48,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:48,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411500976] [2024-11-17 03:38:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:48,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:48,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411500976] [2024-11-17 03:38:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411500976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:48,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117475129] [2024-11-17 03:38:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:48,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:48,368 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) [2024-11-17 03:38:48,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:38:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:48,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:38:48,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:48,602 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 [2024-11-17 03:38:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:48,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:48,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117475129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:48,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:48,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:38:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909990243] [2024-11-17 03:38:48,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:48,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:38:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:38:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:38:48,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 96 [2024-11-17 03:38:48,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 189 flow. Second operand has 11 states, 11 states have (on average 29.363636363636363) internal successors, (323), 11 states have internal predecessors, (323), 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) [2024-11-17 03:38:48,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:48,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 96 [2024-11-17 03:38:48,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:51,150 INFO L124 PetriNetUnfolderBase]: 19652/27356 cut-off events. [2024-11-17 03:38:51,151 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-17 03:38:51,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53353 conditions, 27356 events. 19652/27356 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 1999. Compared 194586 event pairs, 16460 based on Foata normal form. 0/16465 useless extension candidates. Maximal degree in co-relation 53316. Up to 25511 conditions per place. [2024-11-17 03:38:51,320 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 50 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-11-17 03:38:51,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 329 flow [2024-11-17 03:38:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:38:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:38:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 318 transitions. [2024-11-17 03:38:51,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2024-11-17 03:38:51,328 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 189 flow. Second operand 9 states and 318 transitions. [2024-11-17 03:38:51,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 329 flow [2024-11-17 03:38:51,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:38:51,331 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 222 flow [2024-11-17 03:38:51,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2024-11-17 03:38:51,335 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2024-11-17 03:38:51,335 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 222 flow [2024-11-17 03:38:51,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.363636363636363) internal successors, (323), 11 states have internal predecessors, (323), 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) [2024-11-17 03:38:51,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:51,336 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:51,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:38:51,536 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 [2024-11-17 03:38:51,537 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:51,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash -128184904, now seen corresponding path program 1 times [2024-11-17 03:38:51,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:51,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42764496] [2024-11-17 03:38:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:51,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:51,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:51,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42764496] [2024-11-17 03:38:51,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42764496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:51,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:51,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:38:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255851231] [2024-11-17 03:38:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:51,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:51,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:38:51,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-17 03:38:51,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 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) [2024-11-17 03:38:51,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:51,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-17 03:38:51,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:53,868 INFO L124 PetriNetUnfolderBase]: 19653/27361 cut-off events. [2024-11-17 03:38:53,868 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-17 03:38:53,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53370 conditions, 27361 events. 19653/27361 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 1999. Compared 194673 event pairs, 16460 based on Foata normal form. 0/16472 useless extension candidates. Maximal degree in co-relation 53328. Up to 25514 conditions per place. [2024-11-17 03:38:54,058 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 54 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-11-17 03:38:54,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 85 transitions, 354 flow [2024-11-17 03:38:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 215 transitions. [2024-11-17 03:38:54,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2024-11-17 03:38:54,061 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 222 flow. Second operand 5 states and 215 transitions. [2024-11-17 03:38:54,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 85 transitions, 354 flow [2024-11-17 03:38:54,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 312 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:38:54,064 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 222 flow [2024-11-17 03:38:54,065 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2024-11-17 03:38:54,065 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -5 predicate places. [2024-11-17 03:38:54,065 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 222 flow [2024-11-17 03:38:54,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 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) [2024-11-17 03:38:54,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:54,066 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:54,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:38:54,066 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:54,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -529652937, now seen corresponding path program 1 times [2024-11-17 03:38:54,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:54,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400758382] [2024-11-17 03:38:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:54,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:54,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400758382] [2024-11-17 03:38:54,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400758382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:54,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143937094] [2024-11-17 03:38:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:54,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:54,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:54,396 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) [2024-11-17 03:38:54,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:38:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:54,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:38:54,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:54,479 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 [2024-11-17 03:38:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:54,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143937094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:54,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:54,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:38:54,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964388936] [2024-11-17 03:38:54,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:54,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:38:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:38:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:38:54,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 96 [2024-11-17 03:38:54,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 222 flow. Second operand has 13 states, 13 states have (on average 29.46153846153846) internal successors, (383), 13 states have internal predecessors, (383), 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) [2024-11-17 03:38:54,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:54,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 96 [2024-11-17 03:38:54,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:57,000 INFO L124 PetriNetUnfolderBase]: 19653/27360 cut-off events. [2024-11-17 03:38:57,000 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-17 03:38:57,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53367 conditions, 27360 events. 19653/27360 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 1999. Compared 194634 event pairs, 16460 based on Foata normal form. 0/16471 useless extension candidates. Maximal degree in co-relation 53311. Up to 25505 conditions per place. [2024-11-17 03:38:57,129 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 49 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-11-17 03:38:57,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 86 transitions, 354 flow [2024-11-17 03:38:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:38:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:38:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 288 transitions. [2024-11-17 03:38:57,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-17 03:38:57,133 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 222 flow. Second operand 8 states and 288 transitions. [2024-11-17 03:38:57,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 86 transitions, 354 flow [2024-11-17 03:38:57,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:57,135 INFO L231 Difference]: Finished difference. Result has 89 places, 84 transitions, 246 flow [2024-11-17 03:38:57,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=246, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2024-11-17 03:38:57,137 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -1 predicate places. [2024-11-17 03:38:57,137 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 246 flow [2024-11-17 03:38:57,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.46153846153846) internal successors, (383), 13 states have internal predecessors, (383), 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) [2024-11-17 03:38:57,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:57,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:57,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:38:57,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:57,341 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:57,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash -531190408, now seen corresponding path program 1 times [2024-11-17 03:38:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982225115] [2024-11-17 03:38:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:57,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:57,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982225115] [2024-11-17 03:38:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982225115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:57,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:57,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:38:57,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221639729] [2024-11-17 03:38:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:57,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:57,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:38:57,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-17 03:38:57,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:57,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:57,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-17 03:38:57,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:59,623 INFO L124 PetriNetUnfolderBase]: 19654/27365 cut-off events. [2024-11-17 03:38:59,624 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-17 03:38:59,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53385 conditions, 27365 events. 19654/27365 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 1999. Compared 194453 event pairs, 16460 based on Foata normal form. 0/16477 useless extension candidates. Maximal degree in co-relation 53321. Up to 25517 conditions per place. [2024-11-17 03:38:59,743 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 55 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-11-17 03:38:59,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 382 flow [2024-11-17 03:38:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-11-17 03:38:59,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-11-17 03:38:59,745 INFO L175 Difference]: Start difference. First operand has 89 places, 84 transitions, 246 flow. Second operand 5 states and 214 transitions. [2024-11-17 03:38:59,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 382 flow [2024-11-17 03:38:59,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 87 transitions, 347 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-17 03:38:59,750 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 256 flow [2024-11-17 03:38:59,751 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-11-17 03:38:59,752 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -2 predicate places. [2024-11-17 03:38:59,752 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 256 flow [2024-11-17 03:38:59,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:59,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:59,753 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:59,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:38:59,753 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:59,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2033048411, now seen corresponding path program 1 times [2024-11-17 03:38:59,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:59,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973988065] [2024-11-17 03:38:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:59,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:00,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:00,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973988065] [2024-11-17 03:39:00,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973988065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:00,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827291448] [2024-11-17 03:39:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:00,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:00,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:00,007 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) [2024-11-17 03:39:00,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:39:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:00,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:39:00,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:00,097 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 [2024-11-17 03:39:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:00,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827291448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:00,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:00,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:39:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095346969] [2024-11-17 03:39:00,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:00,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:39:00,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:39:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:39:00,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 96 [2024-11-17 03:39:00,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 29.76923076923077) internal successors, (387), 13 states have internal predecessors, (387), 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) [2024-11-17 03:39:00,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:00,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 96 [2024-11-17 03:39:00,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:02,659 INFO L124 PetriNetUnfolderBase]: 19655/27369 cut-off events. [2024-11-17 03:39:02,659 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-17 03:39:02,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53401 conditions, 27369 events. 19655/27369 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 1999. Compared 194469 event pairs, 16460 based on Foata normal form. 0/16482 useless extension candidates. Maximal degree in co-relation 53327. Up to 25509 conditions per place. [2024-11-17 03:39:02,788 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 51 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-11-17 03:39:02,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 418 flow [2024-11-17 03:39:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:39:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:39:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 352 transitions. [2024-11-17 03:39:02,791 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-11-17 03:39:02,791 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 256 flow. Second operand 10 states and 352 transitions. [2024-11-17 03:39:02,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 418 flow [2024-11-17 03:39:02,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 93 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:02,795 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 301 flow [2024-11-17 03:39:02,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=301, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2024-11-17 03:39:02,796 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-11-17 03:39:02,798 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 301 flow [2024-11-17 03:39:02,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.76923076923077) internal successors, (387), 13 states have internal predecessors, (387), 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) [2024-11-17 03:39:02,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:02,798 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:02,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:39:02,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:02,999 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:39:03,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash 90059078, now seen corresponding path program 1 times [2024-11-17 03:39:03,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:03,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519971731] [2024-11-17 03:39:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:03,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:03,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519971731] [2024-11-17 03:39:03,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519971731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:03,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:03,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:39:03,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592977435] [2024-11-17 03:39:03,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:03,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:03,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:03,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-17 03:39:03,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2024-11-17 03:39:03,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:03,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-17 03:39:03,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:05,556 INFO L124 PetriNetUnfolderBase]: 22948/32316 cut-off events. [2024-11-17 03:39:05,557 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-17 03:39:05,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63037 conditions, 32316 events. 22948/32316 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 2227. Compared 236331 event pairs, 19427 based on Foata normal form. 694/21112 useless extension candidates. Maximal degree in co-relation 53351. Up to 25529 conditions per place. [2024-11-17 03:39:05,695 INFO L140 encePairwiseOnDemand]: 81/96 looper letters, 113 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2024-11-17 03:39:05,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 140 transitions, 711 flow [2024-11-17 03:39:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:39:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:39:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-17 03:39:05,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-11-17 03:39:05,698 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 301 flow. Second operand 5 states and 268 transitions. [2024-11-17 03:39:05,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 140 transitions, 711 flow [2024-11-17 03:39:05,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 140 transitions, 633 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-17 03:39:05,703 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 325 flow [2024-11-17 03:39:05,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2024-11-17 03:39:05,704 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-11-17 03:39:05,705 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 325 flow [2024-11-17 03:39:05,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2024-11-17 03:39:05,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:05,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:05,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:39:05,706 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:39:05,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1831058899, now seen corresponding path program 1 times [2024-11-17 03:39:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:05,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018168274] [2024-11-17 03:39:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:05,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018168274] [2024-11-17 03:39:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018168274] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:05,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:05,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:39:05,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900642409] [2024-11-17 03:39:05,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:05,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:05,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:05,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-17 03:39:05,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 325 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:05,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:05,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-17 03:39:05,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:08,628 INFO L124 PetriNetUnfolderBase]: 26979/38817 cut-off events. [2024-11-17 03:39:08,628 INFO L125 PetriNetUnfolderBase]: For 2024/2024 co-relation queries the response was YES. [2024-11-17 03:39:08,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83048 conditions, 38817 events. 26979/38817 cut-off events. For 2024/2024 co-relation queries the response was YES. Maximal size of possible extension queue 2356. Compared 297809 event pairs, 23098 based on Foata normal form. 665/26073 useless extension candidates. Maximal degree in co-relation 71498. Up to 30065 conditions per place. [2024-11-17 03:39:08,874 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 109 selfloop transitions, 10 changer transitions 0/139 dead transitions. [2024-11-17 03:39:08,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 139 transitions, 707 flow [2024-11-17 03:39:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:39:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:39:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 260 transitions. [2024-11-17 03:39:08,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-17 03:39:08,876 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 325 flow. Second operand 5 states and 260 transitions. [2024-11-17 03:39:08,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 139 transitions, 707 flow [2024-11-17 03:39:08,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 139 transitions, 705 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:39:08,884 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 412 flow [2024-11-17 03:39:08,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-11-17 03:39:08,885 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2024-11-17 03:39:08,885 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 412 flow [2024-11-17 03:39:08,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:08,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:08,885 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:08,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:39:08,886 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:39:08,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1377446839, now seen corresponding path program 1 times [2024-11-17 03:39:08,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:08,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698094233] [2024-11-17 03:39:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:08,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:09,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698094233] [2024-11-17 03:39:09,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698094233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:09,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:09,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:39:09,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001889200] [2024-11-17 03:39:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:09,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:39:09,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:09,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:39:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:39:09,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 96 [2024-11-17 03:39:09,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 412 flow. Second operand has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 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) [2024-11-17 03:39:09,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:09,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 96 [2024-11-17 03:39:09,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:14,088 INFO L124 PetriNetUnfolderBase]: 43351/62893 cut-off events. [2024-11-17 03:39:14,088 INFO L125 PetriNetUnfolderBase]: For 5032/5417 co-relation queries the response was YES. [2024-11-17 03:39:14,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143787 conditions, 62893 events. 43351/62893 cut-off events. For 5032/5417 co-relation queries the response was YES. Maximal size of possible extension queue 3386. Compared 506836 event pairs, 29036 based on Foata normal form. 1276/45734 useless extension candidates. Maximal degree in co-relation 113763. Up to 40973 conditions per place. [2024-11-17 03:39:14,435 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 129 selfloop transitions, 14 changer transitions 0/162 dead transitions. [2024-11-17 03:39:14,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 879 flow [2024-11-17 03:39:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:39:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:39:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 332 transitions. [2024-11-17 03:39:14,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-17 03:39:14,437 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 412 flow. Second operand 7 states and 332 transitions. [2024-11-17 03:39:14,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 879 flow [2024-11-17 03:39:14,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 162 transitions, 874 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:39:14,456 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 459 flow [2024-11-17 03:39:14,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2024-11-17 03:39:14,456 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 18 predicate places. [2024-11-17 03:39:14,456 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 459 flow [2024-11-17 03:39:14,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 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) [2024-11-17 03:39:14,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:14,457 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:14,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:39:14,457 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:39:14,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1355016372, now seen corresponding path program 1 times [2024-11-17 03:39:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:14,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814791307] [2024-11-17 03:39:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:14,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:14,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814791307] [2024-11-17 03:39:14,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814791307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:14,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:14,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:39:14,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990779203] [2024-11-17 03:39:14,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:14,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:14,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:14,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-17 03:39:14,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:14,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:14,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-17 03:39:14,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand