./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:48:47,533 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:48:47,588 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:48:47,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:48:47,593 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:48:47,623 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:48:47,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:48:47,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:48:47,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:48:47,626 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:48:47,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:48:47,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:48:47,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:48:47,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:48:47,629 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:48:47,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:48:47,630 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:48:47,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:48:47,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:48:47,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:48:47,634 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:48:47,634 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:48:47,634 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:48:47,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:48:47,635 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:48:47,635 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:48:47,635 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:48:47,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:48:47,635 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:48:47,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:48:47,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:48:47,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:48:47,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:48:47,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:48:47,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:48:47,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:48:47,639 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:48:47,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:48:47,639 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:48:47,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:48:47,639 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:48:47,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:48:47,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2024-11-19 09:48:47,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:48:47,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:48:47,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:48:47,898 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:48:47,899 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:48:47,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2024-11-19 09:48:49,388 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:48:49,568 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:48:49,569 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2024-11-19 09:48:49,579 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6ceb3bf/b53be699a3834f5aad8c10ebf24d02da/FLAGa23534152 [2024-11-19 09:48:49,956 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6ceb3bf/b53be699a3834f5aad8c10ebf24d02da [2024-11-19 09:48:49,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:48:49,961 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:48:49,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:48:49,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:48:49,969 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:48:49,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:48:49" (1/1) ... [2024-11-19 09:48:49,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b98a1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:49, skipping insertion in model container [2024-11-19 09:48:49,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:48:49" (1/1) ... [2024-11-19 09:48:50,005 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:48:50,242 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:48:50,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:48:50,253 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:48:50,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:48:50,310 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:48:50,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50 WrapperNode [2024-11-19 09:48:50,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:48:50,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:48:50,312 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:48:50,312 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:48:50,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,362 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 463 [2024-11-19 09:48:50,363 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:48:50,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:48:50,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:48:50,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:48:50,384 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,393 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,420 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-19 09:48:50,420 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,420 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,433 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,439 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,446 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,448 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:48:50,463 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:48:50,463 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:48:50,464 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:48:50,465 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (1/1) ... [2024-11-19 09:48:50,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:48:50,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:50,503 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) [2024-11-19 09:48:50,507 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 [2024-11-19 09:48:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:48:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:48:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:48:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:48:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:48:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:48:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:48:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-19 09:48:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-19 09:48:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:48:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:48:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:48:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:48:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:48:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:48:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:48:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:48:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:48:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:48:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:48:50,563 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:48:50,685 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:48:50,688 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:48:51,439 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:48:51,439 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:48:51,927 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:48:51,928 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-19 09:48:51,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:48:51 BoogieIcfgContainer [2024-11-19 09:48:51,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:48:51,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:48:51,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:48:51,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:48:51,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:48:49" (1/3) ... [2024-11-19 09:48:51,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471c5b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:48:51, skipping insertion in model container [2024-11-19 09:48:51,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:50" (2/3) ... [2024-11-19 09:48:51,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471c5b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:48:51, skipping insertion in model container [2024-11-19 09:48:51,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:48:51" (3/3) ... [2024-11-19 09:48:51,936 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2024-11-19 09:48:51,953 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:48:51,954 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-19 09:48:51,954 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:48:52,038 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-19 09:48:52,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 272 flow [2024-11-19 09:48:52,131 INFO L124 PetriNetUnfolderBase]: 24/118 cut-off events. [2024-11-19 09:48:52,132 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:48:52,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 118 events. 24/118 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 392 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 98. Up to 8 conditions per place. [2024-11-19 09:48:52,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 272 flow [2024-11-19 09:48:52,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 117 transitions, 258 flow [2024-11-19 09:48:52,162 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:48:52,172 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;@195163de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:48:52,173 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-19 09:48:52,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:48:52,177 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:48:52,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:48:52,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:52,178 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:48:52,179 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-19 09:48:52,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1380856, now seen corresponding path program 1 times [2024-11-19 09:48:52,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:52,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148339116] [2024-11-19 09:48:52,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:52,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:52,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148339116] [2024-11-19 09:48:52,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148339116] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:52,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:52,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:48:52,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759069081] [2024-11-19 09:48:52,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:52,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:48:52,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:48:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:48:52,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2024-11-19 09:48:52,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-11-19 09:48:52,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:52,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2024-11-19 09:48:52,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:05,534 INFO L124 PetriNetUnfolderBase]: 118658/157187 cut-off events. [2024-11-19 09:49:05,534 INFO L125 PetriNetUnfolderBase]: For 3382/3382 co-relation queries the response was YES. [2024-11-19 09:49:05,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305211 conditions, 157187 events. 118658/157187 cut-off events. For 3382/3382 co-relation queries the response was YES. Maximal size of possible extension queue 12140. Compared 1178908 event pairs, 87208 based on Foata normal form. 1/82086 useless extension candidates. Maximal degree in co-relation 297468. Up to 144091 conditions per place. [2024-11-19 09:49:06,668 INFO L140 encePairwiseOnDemand]: 111/122 looper letters, 76 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2024-11-19 09:49:06,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 107 transitions, 394 flow [2024-11-19 09:49:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:49:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:49:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2024-11-19 09:49:06,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5163934426229508 [2024-11-19 09:49:06,680 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 258 flow. Second operand 3 states and 189 transitions. [2024-11-19 09:49:06,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 107 transitions, 394 flow [2024-11-19 09:49:06,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 378 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 09:49:06,767 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 226 flow [2024-11-19 09:49:06,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2024-11-19 09:49:06,774 INFO L277 CegarLoopForPetriNet]: 106 programPoint places, -12 predicate places. [2024-11-19 09:49:06,774 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 226 flow [2024-11-19 09:49:06,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-11-19 09:49:06,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:06,775 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:49:06,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:49:06,776 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-19 09:49:06,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1380857, now seen corresponding path program 1 times [2024-11-19 09:49:06,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:06,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150829954] [2024-11-19 09:49:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:07,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:07,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150829954] [2024-11-19 09:49:07,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150829954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:07,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:07,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:07,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457151920] [2024-11-19 09:49:07,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:07,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:07,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:07,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:07,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:07,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2024-11-19 09:49:07,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2024-11-19 09:49:07,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:07,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2024-11-19 09:49:07,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:16,853 INFO L124 PetriNetUnfolderBase]: 118658/157183 cut-off events. [2024-11-19 09:49:16,853 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2024-11-19 09:49:17,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302838 conditions, 157183 events. 118658/157183 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 12140. Compared 1177914 event pairs, 87208 based on Foata normal form. 0/82082 useless extension candidates. Maximal degree in co-relation 302807. Up to 144091 conditions per place. [2024-11-19 09:49:17,839 INFO L140 encePairwiseOnDemand]: 108/122 looper letters, 68 selfloop transitions, 10 changer transitions 0/103 dead transitions. [2024-11-19 09:49:17,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 103 transitions, 374 flow [2024-11-19 09:49:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 218 transitions. [2024-11-19 09:49:17,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44672131147540983 [2024-11-19 09:49:17,846 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 226 flow. Second operand 4 states and 218 transitions. [2024-11-19 09:49:17,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 103 transitions, 374 flow [2024-11-19 09:49:17,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 103 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:17,850 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 234 flow [2024-11-19 09:49:17,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-11-19 09:49:17,851 INFO L277 CegarLoopForPetriNet]: 106 programPoint places, -15 predicate places. [2024-11-19 09:49:17,851 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 234 flow [2024-11-19 09:49:17,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2024-11-19 09:49:17,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:17,852 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:17,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:49:17,854 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-19 09:49:17,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash 693802959, now seen corresponding path program 1 times [2024-11-19 09:49:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:17,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514526205] [2024-11-19 09:49:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:18,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514526205] [2024-11-19 09:49:18,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514526205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:18,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:18,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:49:18,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575160954] [2024-11-19 09:49:18,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:18,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:49:18,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:49:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:49:18,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 122 [2024-11-19 09:49:18,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-11-19 09:49:18,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:18,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 122 [2024-11-19 09:49:18,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:32,456 INFO L124 PetriNetUnfolderBase]: 194134/257364 cut-off events. [2024-11-19 09:49:32,456 INFO L125 PetriNetUnfolderBase]: For 1404/1404 co-relation queries the response was YES. [2024-11-19 09:49:32,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496355 conditions, 257364 events. 194134/257364 cut-off events. For 1404/1404 co-relation queries the response was YES. Maximal size of possible extension queue 17004. Compared 1974170 event pairs, 65242 based on Foata normal form. 4882/142073 useless extension candidates. Maximal degree in co-relation 496316. Up to 150037 conditions per place. [2024-11-19 09:49:34,011 INFO L140 encePairwiseOnDemand]: 109/122 looper letters, 127 selfloop transitions, 4 changer transitions 0/156 dead transitions. [2024-11-19 09:49:34,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 156 transitions, 608 flow [2024-11-19 09:49:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:49:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:49:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-11-19 09:49:34,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6939890710382514 [2024-11-19 09:49:34,014 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 234 flow. Second operand 3 states and 254 transitions. [2024-11-19 09:49:34,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 156 transitions, 608 flow [2024-11-19 09:49:34,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 156 transitions, 588 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:34,019 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 256 flow [2024-11-19 09:49:34,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2024-11-19 09:49:34,020 INFO L277 CegarLoopForPetriNet]: 106 programPoint places, -15 predicate places. [2024-11-19 09:49:34,020 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 256 flow [2024-11-19 09:49:34,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-11-19 09:49:34,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:34,020 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:34,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:49:34,021 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-19 09:49:34,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 33057776, now seen corresponding path program 1 times [2024-11-19 09:49:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:34,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430844885] [2024-11-19 09:49:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:34,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430844885] [2024-11-19 09:49:34,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430844885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:34,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:34,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:34,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316002976] [2024-11-19 09:49:34,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:34,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:49:34,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:49:34,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:49:34,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 122 [2024-11-19 09:49:34,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 106 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2024-11-19 09:49:34,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:34,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 122 [2024-11-19 09:49:34,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand