./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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-trans.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 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:13:55,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:13:55,794 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:13:55,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:13:55,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:13:55,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:13:55,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:13:55,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:13:55,825 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:13:55,826 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:13:55,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:13:55,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:13:55,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:13:55,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:13:55,828 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:13:55,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:13:55,828 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:13:55,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:13:55,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:13:55,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:13:55,830 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:13:55,830 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:13:55,830 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:13:55,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:13:55,831 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:13:55,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:13:55,832 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:13:55,832 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:13:55,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:13:55,832 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:13:55,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:13:55,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:13:55,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:13:55,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:13:55,834 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:13:55,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:13:55,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:13:55,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:13:55,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:13:55,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:13:55,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:13:55,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:13:55,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b [2024-11-10 18:13:56,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:13:56,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:13:56,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:13:56,095 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:13:56,095 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:13:56,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-11-10 18:13:57,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:13:57,820 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:13:57,822 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-11-10 18:13:57,832 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7454f3b/63281a776c5c4ed386f744a9e547d8ae/FLAGbfab2ea4b [2024-11-10 18:13:58,195 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7454f3b/63281a776c5c4ed386f744a9e547d8ae [2024-11-10 18:13:58,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:13:58,199 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:13:58,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:13:58,200 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:13:58,205 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:13:58,206 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,206 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631a7b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58, skipping insertion in model container [2024-11-10 18:13:58,207 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,230 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:13:58,467 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:13:58,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:13:58,480 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:13:58,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:13:58,547 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:13:58,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58 WrapperNode [2024-11-10 18:13:58,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:13:58,550 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:13:58,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:13:58,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:13:58,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,628 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 599 [2024-11-10 18:13:58,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:13:58,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:13:58,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:13:58,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:13:58,643 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,654 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,695 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]. [2024-11-10 18:13:58,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,696 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,720 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,729 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,735 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:13:58,744 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:13:58,744 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:13:58,744 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:13:58,747 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (1/1) ... [2024-11-10 18:13:58,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:13:58,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:13:58,791 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) [2024-11-10 18:13:58,795 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 [2024-11-10 18:13:58,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:13:58,847 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:13:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:13:58,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:13:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:13:58,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:13:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:13:58,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:13:58,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:13:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:13:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:13:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:13:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:13:58,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:13:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:13:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:13:58,854 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:13:58,992 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:13:58,994 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:13:59,881 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:13:59,881 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:14:00,518 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:14:00,519 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:14:00,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:14:00 BoogieIcfgContainer [2024-11-10 18:14:00,519 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:14:00,522 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:14:00,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:14:00,526 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:14:00,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:13:58" (1/3) ... [2024-11-10 18:14:00,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f5a88d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:14:00, skipping insertion in model container [2024-11-10 18:14:00,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:58" (2/3) ... [2024-11-10 18:14:00,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f5a88d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:14:00, skipping insertion in model container [2024-11-10 18:14:00,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:14:00" (3/3) ... [2024-11-10 18:14:00,531 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2024-11-10 18:14:00,549 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:14:00,550 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2024-11-10 18:14:00,550 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:14:00,693 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:14:00,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 195 transitions, 411 flow [2024-11-10 18:14:00,835 INFO L124 PetriNetUnfolderBase]: 33/192 cut-off events. [2024-11-10 18:14:00,835 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:14:00,846 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. [2024-11-10 18:14:00,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 195 transitions, 411 flow [2024-11-10 18:14:00,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 191 transitions, 400 flow [2024-11-10 18:14:00,872 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:14:00,883 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;@7de122c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:14:00,883 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2024-11-10 18:14:00,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:14:00,889 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:14:00,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:14:00,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:00,891 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:14:00,892 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-10 18:14:00,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash 53396452, now seen corresponding path program 1 times [2024-11-10 18:14:00,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:00,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597199026] [2024-11-10 18:14:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:00,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:01,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597199026] [2024-11-10 18:14:01,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597199026] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:01,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:01,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:14:01,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576434909] [2024-11-10 18:14:01,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:01,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:14:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:01,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:14:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:14:01,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-10 18:14:01,397 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) [2024-11-10 18:14:01,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:01,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-10 18:14:01,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:09,867 INFO L124 PetriNetUnfolderBase]: 49598/89293 cut-off events. [2024-11-10 18:14:09,868 INFO L125 PetriNetUnfolderBase]: For 1212/1212 co-relation queries the response was YES. [2024-11-10 18:14:10,066 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. [2024-11-10 18:14:10,592 INFO L140 encePairwiseOnDemand]: 183/195 looper letters, 84 selfloop transitions, 2 changer transitions 0/180 dead transitions. [2024-11-10 18:14:10,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 180 transitions, 550 flow [2024-11-10 18:14:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:14:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:14:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2024-11-10 18:14:10,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-10 18:14:10,612 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 400 flow. Second operand 3 states and 390 transitions. [2024-11-10 18:14:10,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 180 transitions, 550 flow [2024-11-10 18:14:10,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 180 transitions, 538 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:14:10,635 INFO L231 Difference]: Finished difference. Result has 159 places, 180 transitions, 370 flow [2024-11-10 18:14:10,637 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} [2024-11-10 18:14:10,641 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -9 predicate places. [2024-11-10 18:14:10,641 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 180 transitions, 370 flow [2024-11-10 18:14:10,641 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) [2024-11-10 18:14:10,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:10,642 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:14:10,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:14:10,643 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-10 18:14:10,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash 53396453, now seen corresponding path program 1 times [2024-11-10 18:14:10,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:10,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711034338] [2024-11-10 18:14:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:10,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711034338] [2024-11-10 18:14:10,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711034338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:10,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:10,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:14:10,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461307732] [2024-11-10 18:14:10,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:10,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:10,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:10,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:10,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:11,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-10 18:14:11,014 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) [2024-11-10 18:14:11,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:11,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-10 18:14:11,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:17,579 INFO L124 PetriNetUnfolderBase]: 49601/89308 cut-off events. [2024-11-10 18:14:17,579 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-11-10 18:14:17,740 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. [2024-11-10 18:14:18,311 INFO L140 encePairwiseOnDemand]: 185/195 looper letters, 91 selfloop transitions, 7 changer transitions 0/189 dead transitions. [2024-11-10 18:14:18,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 189 transitions, 586 flow [2024-11-10 18:14:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:14:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:14:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2024-11-10 18:14:18,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2024-11-10 18:14:18,314 INFO L175 Difference]: Start difference. First operand has 159 places, 180 transitions, 370 flow. Second operand 3 states and 395 transitions. [2024-11-10 18:14:18,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 189 transitions, 586 flow [2024-11-10 18:14:18,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 189 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:18,320 INFO L231 Difference]: Finished difference. Result has 161 places, 186 transitions, 424 flow [2024-11-10 18:14:18,321 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} [2024-11-10 18:14:18,321 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -7 predicate places. [2024-11-10 18:14:18,322 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 186 transitions, 424 flow [2024-11-10 18:14:18,322 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) [2024-11-10 18:14:18,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:18,322 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:14:18,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:14:18,323 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-10 18:14:18,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1597540871, now seen corresponding path program 1 times [2024-11-10 18:14:18,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:18,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893517284] [2024-11-10 18:14:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:18,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:18,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:18,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893517284] [2024-11-10 18:14:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893517284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:18,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170096801] [2024-11-10 18:14:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:18,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:18,550 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) [2024-11-10 18:14:18,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:14:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:18,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 18:14:18,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:18,730 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 [2024-11-10 18:14:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:18,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:18,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170096801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:18,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:18,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-10 18:14:18,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093652509] [2024-11-10 18:14:18,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:18,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:14:18,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:14:18,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:14:19,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-10 18:14:19,292 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) [2024-11-10 18:14:19,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:19,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-10 18:14:19,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:26,034 INFO L124 PetriNetUnfolderBase]: 49610/89353 cut-off events. [2024-11-10 18:14:26,034 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-11-10 18:14:26,226 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. [2024-11-10 18:14:26,564 INFO L140 encePairwiseOnDemand]: 185/195 looper letters, 100 selfloop transitions, 25 changer transitions 0/216 dead transitions. [2024-11-10 18:14:26,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 216 transitions, 782 flow [2024-11-10 18:14:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:14:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:14:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 722 transitions. [2024-11-10 18:14:26,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6170940170940171 [2024-11-10 18:14:26,566 INFO L175 Difference]: Start difference. First operand has 161 places, 186 transitions, 424 flow. Second operand 6 states and 722 transitions. [2024-11-10 18:14:26,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 216 transitions, 782 flow [2024-11-10 18:14:26,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 216 transitions, 756 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:26,572 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 585 flow [2024-11-10 18:14:26,572 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} [2024-11-10 18:14:26,573 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -1 predicate places. [2024-11-10 18:14:26,573 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 585 flow [2024-11-10 18:14:26,574 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) [2024-11-10 18:14:26,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:26,574 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-10 18:14:26,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:14:26,778 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 [2024-11-10 18:14:26,779 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-10 18:14:26,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:26,779 INFO L85 PathProgramCache]: Analyzing trace with hash -609772187, now seen corresponding path program 2 times [2024-11-10 18:14:26,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:26,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547881273] [2024-11-10 18:14:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:26,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:27,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:27,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547881273] [2024-11-10 18:14:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547881273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:27,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884203060] [2024-11-10 18:14:27,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:14:27,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:27,150 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) [2024-11-10 18:14:27,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:14:27,264 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:14:27,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:14:27,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:14:27,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:27,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-10 18:14:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:27,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:28,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884203060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:28,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:28,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-10 18:14:28,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532074699] [2024-11-10 18:14:28,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:28,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 18:14:28,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 18:14:28,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-11-10 18:14:29,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 195 [2024-11-10 18:14:29,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 585 flow. Second operand has 20 states, 20 states have (on average 96.65) internal successors, (1933), 20 states have internal predecessors, (1933), 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) [2024-11-10 18:14:29,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:29,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 195 [2024-11-10 18:14:29,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:37,973 INFO L124 PetriNetUnfolderBase]: 49598/89332 cut-off events. [2024-11-10 18:14:37,974 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2024-11-10 18:14:38,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153214 conditions, 89332 events. 49598/89332 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850487 event pairs, 29352 based on Foata normal form. 3/71912 useless extension candidates. Maximal degree in co-relation 153094. Up to 63479 conditions per place. [2024-11-10 18:14:38,617 INFO L140 encePairwiseOnDemand]: 179/195 looper letters, 94 selfloop transitions, 22 changer transitions 0/204 dead transitions. [2024-11-10 18:14:38,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 204 transitions, 740 flow [2024-11-10 18:14:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:14:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:14:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 894 transitions. [2024-11-10 18:14:38,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.573076923076923 [2024-11-10 18:14:38,621 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 585 flow. Second operand 8 states and 894 transitions. [2024-11-10 18:14:38,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 204 transitions, 740 flow [2024-11-10 18:14:38,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 204 transitions, 682 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-10 18:14:38,628 INFO L231 Difference]: Finished difference. Result has 172 places, 192 transitions, 548 flow [2024-11-10 18:14:38,629 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=548, PETRI_PLACES=172, PETRI_TRANSITIONS=192} [2024-11-10 18:14:38,630 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, 4 predicate places. [2024-11-10 18:14:38,630 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 192 transitions, 548 flow [2024-11-10 18:14:38,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.65) internal successors, (1933), 20 states have internal predecessors, (1933), 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) [2024-11-10 18:14:38,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:38,632 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:38,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 18:14:38,833 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 [2024-11-10 18:14:38,834 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-10 18:14:38,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash -121705948, now seen corresponding path program 1 times [2024-11-10 18:14:38,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:38,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942455821] [2024-11-10 18:14:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:38,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-10 18:14:39,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:39,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942455821] [2024-11-10 18:14:39,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942455821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:39,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:39,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:14:39,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742098546] [2024-11-10 18:14:39,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:39,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:14:39,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:39,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:14:39,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:14:39,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 195 [2024-11-10 18:14:39,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 192 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 93.33333333333333) internal successors, (560), 6 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:39,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:39,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 195 [2024-11-10 18:14:39,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand