./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-subst.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/chl-nzb-file-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:33:04,799 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:33:04,877 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:33:04,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:33:04,887 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:33:04,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:33:04,910 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:33:04,911 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:33:04,911 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:33:04,912 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:33:04,912 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:33:04,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:33:04,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:33:04,914 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:33:04,914 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:33:04,915 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:33:04,915 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:33:04,916 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:33:04,916 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:33:04,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:33:04,917 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:33:04,917 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:33:04,918 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:33:04,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:33:04,918 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:33:04,919 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:33:04,919 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:33:04,920 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:33:04,920 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:33:04,920 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:33:04,921 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:33:04,921 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:33:04,921 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:33:04,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:04,922 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:33:04,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:33:04,923 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:33:04,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:33:04,923 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:33:04,924 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:33:04,924 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:33:04,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:33:04,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 [2024-11-17 03:33:05,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:33:05,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:33:05,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:33:05,221 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:33:05,222 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:33:05,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2024-11-17 03:33:06,728 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:33:06,936 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:33:06,936 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2024-11-17 03:33:06,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e130c9222/9654ec05cc6a4fcbafbb81fb1e3d3a92/FLAG1af88f421 [2024-11-17 03:33:06,958 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e130c9222/9654ec05cc6a4fcbafbb81fb1e3d3a92 [2024-11-17 03:33:06,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:33:06,962 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:33:06,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:06,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:33:06,969 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:33:06,970 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:06" (1/1) ... [2024-11-17 03:33:06,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c48f6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:06, skipping insertion in model container [2024-11-17 03:33:06,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:06" (1/1) ... [2024-11-17 03:33:06,998 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:33:07,247 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 03:33:07,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:07,271 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:33:07,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:07,334 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:33:07,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07 WrapperNode [2024-11-17 03:33:07,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:07,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:07,337 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:33:07,337 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:33:07,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,366 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,411 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 599 [2024-11-17 03:33:07,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:07,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:33:07,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:33:07,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:33:07,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,430 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,461 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 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 03:33:07,462 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,462 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,477 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,484 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:33:07,491 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:33:07,491 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:33:07,491 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:33:07,492 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:07,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:07,559 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 03:33:07,569 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 03:33:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:33:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:33:07,627 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:33:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:33:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:33:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:33:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:33:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:33:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:33:07,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:33:07,634 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 03:33:07,780 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:33:07,782 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:33:08,637 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:33:08,637 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:33:09,213 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:33:09,213 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:33:09,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:09 BoogieIcfgContainer [2024-11-17 03:33:09,213 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:33:09,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:33:09,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:33:09,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:33:09,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:33:06" (1/3) ... [2024-11-17 03:33:09,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735c9f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:09, skipping insertion in model container [2024-11-17 03:33:09,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07" (2/3) ... [2024-11-17 03:33:09,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735c9f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:09, skipping insertion in model container [2024-11-17 03:33:09,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:09" (3/3) ... [2024-11-17 03:33:09,223 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2024-11-17 03:33:09,242 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:33:09,242 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2024-11-17 03:33:09,242 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:33:09,385 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:33:09,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 195 transitions, 411 flow [2024-11-17 03:33:09,511 INFO L124 PetriNetUnfolderBase]: 33/192 cut-off events. [2024-11-17 03:33:09,511 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:33:09,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 192 events. 33/192 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 709 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2024-11-17 03:33:09,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 195 transitions, 411 flow [2024-11-17 03:33:09,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 191 transitions, 400 flow [2024-11-17 03:33:09,597 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:33:09,605 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;@7517f4bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:33:09,606 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2024-11-17 03:33:09,611 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:33:09,612 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:33:09,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:33:09,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:09,613 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:09,614 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:09,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash 53396452, now seen corresponding path program 1 times [2024-11-17 03:33:09,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668288181] [2024-11-17 03:33:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:09,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:10,111 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 03:33:10,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:10,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668288181] [2024-11-17 03:33:10,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668288181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:10,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:10,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:33:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057016572] [2024-11-17 03:33:10,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:10,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:10,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:10,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-17 03:33:10,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 191 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 03:33:10,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:10,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-17 03:33:10,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:19,113 INFO L124 PetriNetUnfolderBase]: 49598/89293 cut-off events. [2024-11-17 03:33:19,113 INFO L125 PetriNetUnfolderBase]: For 1212/1212 co-relation queries the response was YES. [2024-11-17 03:33:19,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153718 conditions, 89293 events. 49598/89293 cut-off events. For 1212/1212 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850468 event pairs, 29352 based on Foata normal form. 4/71877 useless extension candidates. Maximal degree in co-relation 150410. Up to 63479 conditions per place. [2024-11-17 03:33:19,924 INFO L140 encePairwiseOnDemand]: 183/195 looper letters, 84 selfloop transitions, 2 changer transitions 0/180 dead transitions. [2024-11-17 03:33:19,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 180 transitions, 550 flow [2024-11-17 03:33:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2024-11-17 03:33:19,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-17 03:33:19,945 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 400 flow. Second operand 3 states and 390 transitions. [2024-11-17 03:33:19,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 180 transitions, 550 flow [2024-11-17 03:33:19,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 180 transitions, 538 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:33:19,962 INFO L231 Difference]: Finished difference. Result has 159 places, 180 transitions, 370 flow [2024-11-17 03:33:19,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=159, PETRI_TRANSITIONS=180} [2024-11-17 03:33:19,971 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -9 predicate places. [2024-11-17 03:33:19,972 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 180 transitions, 370 flow [2024-11-17 03:33:19,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 03:33:19,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:19,973 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:19,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:33:19,973 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:19,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 53396453, now seen corresponding path program 1 times [2024-11-17 03:33:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:19,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033542598] [2024-11-17 03:33:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:20,262 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 03:33:20,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:20,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033542598] [2024-11-17 03:33:20,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033542598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:20,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:20,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:20,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451057402] [2024-11-17 03:33:20,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:20,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:20,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:20,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-17 03:33:20,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 180 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 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 03:33:20,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:20,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-17 03:33:20,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:27,114 INFO L124 PetriNetUnfolderBase]: 49601/89308 cut-off events. [2024-11-17 03:33:27,114 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-11-17 03:33:27,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153124 conditions, 89308 events. 49601/89308 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850665 event pairs, 29352 based on Foata normal form. 0/71885 useless extension candidates. Maximal degree in co-relation 153062. Up to 63492 conditions per place. [2024-11-17 03:33:27,652 INFO L140 encePairwiseOnDemand]: 185/195 looper letters, 91 selfloop transitions, 7 changer transitions 0/189 dead transitions. [2024-11-17 03:33:27,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 189 transitions, 586 flow [2024-11-17 03:33:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2024-11-17 03:33:27,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2024-11-17 03:33:27,655 INFO L175 Difference]: Start difference. First operand has 159 places, 180 transitions, 370 flow. Second operand 3 states and 395 transitions. [2024-11-17 03:33:27,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 189 transitions, 586 flow [2024-11-17 03:33:27,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 189 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:27,665 INFO L231 Difference]: Finished difference. Result has 161 places, 186 transitions, 424 flow [2024-11-17 03:33:27,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=161, PETRI_TRANSITIONS=186} [2024-11-17 03:33:27,667 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -7 predicate places. [2024-11-17 03:33:27,667 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 186 transitions, 424 flow [2024-11-17 03:33:27,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 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 03:33:27,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:27,668 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:33:27,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:33:27,669 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:27,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:27,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1597540871, now seen corresponding path program 1 times [2024-11-17 03:33:27,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:27,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935726828] [2024-11-17 03:33:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:27,904 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 03:33:27,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:27,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935726828] [2024-11-17 03:33:27,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935726828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:27,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351220020] [2024-11-17 03:33:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:27,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:27,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:27,910 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 03:33:27,911 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 03:33:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:28,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:33:28,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:28,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:33:28,173 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 03:33:28,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:28,256 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 03:33:28,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351220020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:28,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:28,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:33:28,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305625048] [2024-11-17 03:33:28,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:28,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:33:28,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:33:28,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:33:28,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-17 03:33:28,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 186 transitions, 424 flow. Second operand has 9 states, 9 states have (on average 99.66666666666667) internal successors, (897), 9 states have internal predecessors, (897), 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 03:33:28,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:28,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-17 03:33:28,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:35,867 INFO L124 PetriNetUnfolderBase]: 49610/89353 cut-off events. [2024-11-17 03:33:35,867 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-11-17 03:33:36,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153241 conditions, 89353 events. 49610/89353 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850967 event pairs, 29352 based on Foata normal form. 0/71930 useless extension candidates. Maximal degree in co-relation 153062. Up to 63495 conditions per place. [2024-11-17 03:33:36,426 INFO L140 encePairwiseOnDemand]: 185/195 looper letters, 100 selfloop transitions, 25 changer transitions 0/216 dead transitions. [2024-11-17 03:33:36,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 216 transitions, 782 flow [2024-11-17 03:33:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:33:36,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:33:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 722 transitions. [2024-11-17 03:33:36,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6170940170940171 [2024-11-17 03:33:36,429 INFO L175 Difference]: Start difference. First operand has 161 places, 186 transitions, 424 flow. Second operand 6 states and 722 transitions. [2024-11-17 03:33:36,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 216 transitions, 782 flow [2024-11-17 03:33:36,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 216 transitions, 756 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:36,434 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 585 flow [2024-11-17 03:33:36,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2024-11-17 03:33:36,436 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -1 predicate places. [2024-11-17 03:33:36,436 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 585 flow [2024-11-17 03:33:36,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.66666666666667) internal successors, (897), 9 states have internal predecessors, (897), 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 03:33:36,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:36,437 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-17 03:33:36,455 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 03:33:36,641 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 03:33:36,642 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:36,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:36,642 INFO L85 PathProgramCache]: Analyzing trace with hash -609772187, now seen corresponding path program 2 times [2024-11-17 03:33:36,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:36,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863774980] [2024-11-17 03:33:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:36,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:36,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863774980] [2024-11-17 03:33:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863774980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388510510] [2024-11-17 03:33:36,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:36,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:36,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:36,979 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 03:33:36,981 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 03:33:37,102 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:37,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:37,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:33:37,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:37,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:33:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:37,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:37,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388510510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:37,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:37,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-17 03:33:37,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561417209] [2024-11-17 03:33:37,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:37,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:33:37,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:33:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:33:38,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-17 03:33:38,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 585 flow. Second operand has 18 states, 18 states have (on average 99.83333333333333) internal successors, (1797), 18 states have internal predecessors, (1797), 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 03:33:38,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:38,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-17 03:33:38,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:45,980 INFO L124 PetriNetUnfolderBase]: 49613/89368 cut-off events. [2024-11-17 03:33:45,981 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-11-17 03:33:46,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153323 conditions, 89368 events. 49613/89368 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 851165 event pairs, 29352 based on Foata normal form. 3/71951 useless extension candidates. Maximal degree in co-relation 153169. Up to 63496 conditions per place. [2024-11-17 03:33:46,470 INFO L140 encePairwiseOnDemand]: 185/195 looper letters, 103 selfloop transitions, 31 changer transitions 0/225 dead transitions. [2024-11-17 03:33:46,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 225 transitions, 919 flow [2024-11-17 03:33:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:33:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:33:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 823 transitions. [2024-11-17 03:33:46,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6029304029304029 [2024-11-17 03:33:46,473 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 585 flow. Second operand 7 states and 823 transitions. [2024-11-17 03:33:46,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 225 transitions, 919 flow [2024-11-17 03:33:46,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 225 transitions, 880 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-17 03:33:46,479 INFO L231 Difference]: Finished difference. Result has 173 places, 210 transitions, 667 flow [2024-11-17 03:33:46,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=173, PETRI_TRANSITIONS=210} [2024-11-17 03:33:46,480 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, 5 predicate places. [2024-11-17 03:33:46,480 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 210 transitions, 667 flow [2024-11-17 03:33:46,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.83333333333333) internal successors, (1797), 18 states have internal predecessors, (1797), 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 03:33:46,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:46,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:46,501 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 03:33:46,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-17 03:33:46,683 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:46,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:46,684 INFO L85 PathProgramCache]: Analyzing trace with hash -913440633, now seen corresponding path program 1 times [2024-11-17 03:33:46,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:46,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081739176] [2024-11-17 03:33:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:46,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:46,752 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 03:33:46,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081739176] [2024-11-17 03:33:46,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081739176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:46,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:46,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:46,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578991054] [2024-11-17 03:33:46,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:46,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:46,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:46,764 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-17 03:33:46,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 210 transitions, 667 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:46,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:46,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-17 03:33:46,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand