./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/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-three-array-sum.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 c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:52:29,286 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:52:29,356 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:52:29,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:52:29,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:52:29,394 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:52:29,395 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:52:29,395 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:52:29,396 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:52:29,397 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:52:29,398 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:52:29,398 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:52:29,398 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:52:29,399 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:52:29,399 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:52:29,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:52:29,402 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:52:29,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:52:29,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:52:29,403 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:52:29,403 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:52:29,404 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:52:29,404 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:52:29,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:52:29,404 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:52:29,404 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:52:29,405 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:52:29,405 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:52:29,405 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:52:29,405 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:52:29,405 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:52:29,406 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:52:29,406 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:52:29,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:52:29,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:52:29,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:52:29,408 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:52:29,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:52:29,408 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:52:29,408 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:52:29,409 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:52:29,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:52:29,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2024-11-22 21:52:29,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:52:29,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:52:29,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:52:29,734 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:52:29,734 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:52:29,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-22 21:52:31,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:52:31,399 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:52:31,399 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-22 21:52:31,407 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc1e7ffa7/611e8967fc8d4a2785da94c87d5a7813/FLAG3c78af120 [2024-11-22 21:52:31,420 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc1e7ffa7/611e8967fc8d4a2785da94c87d5a7813 [2024-11-22 21:52:31,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:52:31,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:52:31,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:52:31,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:52:31,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:52:31,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db96707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31, skipping insertion in model container [2024-11-22 21:52:31,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,483 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:52:31,690 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:52:31,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:52:31,701 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:52:31,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:52:31,742 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:52:31,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31 WrapperNode [2024-11-22 21:52:31,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:52:31,744 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:52:31,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:52:31,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:52:31,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,780 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 140 [2024-11-22 21:52:31,781 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:52:31,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:52:31,782 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:52:31,782 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:52:31,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,801 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,818 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 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]. [2024-11-22 21:52:31,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,819 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,837 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:52:31,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:52:31,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:52:31,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:52:31,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (1/1) ... [2024-11-22 21:52:31,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:52:31,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:31,870 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) [2024-11-22 21:52:31,872 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 [2024-11-22 21:52:31,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:52:31,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:52:31,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:52:31,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:52:31,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:52:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:52:31,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:52:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:52:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:52:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:52:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:52:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:52:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:52:31,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:52:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:52:31,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:52:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:52:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:52:31,919 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:52:32,014 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:52:32,016 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:52:32,458 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:52:32,459 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:52:32,748 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:52:32,748 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-22 21:52:32,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:52:32 BoogieIcfgContainer [2024-11-22 21:52:32,749 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:52:32,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:52:32,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:52:32,755 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:52:32,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:52:31" (1/3) ... [2024-11-22 21:52:32,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c565a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:52:32, skipping insertion in model container [2024-11-22 21:52:32,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:31" (2/3) ... [2024-11-22 21:52:32,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c565a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:52:32, skipping insertion in model container [2024-11-22 21:52:32,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:52:32" (3/3) ... [2024-11-22 21:52:32,759 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2024-11-22 21:52:32,779 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:52:32,779 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-22 21:52:32,779 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:52:32,856 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:52:32,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2024-11-22 21:52:32,945 INFO L124 PetriNetUnfolderBase]: 7/61 cut-off events. [2024-11-22 21:52:32,945 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:52:32,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 61 events. 7/61 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 152 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-11-22 21:52:32,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2024-11-22 21:52:32,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 138 flow [2024-11-22 21:52:32,963 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:52:32,970 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;@7b381d24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:52:32,970 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-22 21:52:32,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:52:32,980 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:52:32,980 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:52:32,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:32,982 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:52:32,982 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:32,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 607425, now seen corresponding path program 1 times [2024-11-22 21:52:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:32,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405550202] [2024-11-22 21:52:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:33,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:33,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405550202] [2024-11-22 21:52:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405550202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:33,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:33,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:52:33,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579003772] [2024-11-22 21:52:33,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:33,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:52:33,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:52:33,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:52:33,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-22 21:52:33,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-22 21:52:33,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:33,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-22 21:52:33,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:33,905 INFO L124 PetriNetUnfolderBase]: 1588/2580 cut-off events. [2024-11-22 21:52:33,906 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-11-22 21:52:33,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4895 conditions, 2580 events. 1588/2580 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15398 event pairs, 1210 based on Foata normal form. 1/1918 useless extension candidates. Maximal degree in co-relation 4374. Up to 2144 conditions per place. [2024-11-22 21:52:33,935 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 38 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-22 21:52:33,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 208 flow [2024-11-22 21:52:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:52:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:52:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-11-22 21:52:33,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-11-22 21:52:33,950 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 101 transitions. [2024-11-22 21:52:33,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 208 flow [2024-11-22 21:52:33,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:52:33,964 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 120 flow [2024-11-22 21:52:33,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-11-22 21:52:33,972 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2024-11-22 21:52:33,973 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 120 flow [2024-11-22 21:52:33,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-22 21:52:33,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:33,974 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:52:33,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:52:33,975 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:33,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash 607426, now seen corresponding path program 1 times [2024-11-22 21:52:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:33,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384348780] [2024-11-22 21:52:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:33,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:34,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:34,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384348780] [2024-11-22 21:52:34,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384348780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:34,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:34,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:52:34,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577445802] [2024-11-22 21:52:34,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:34,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:52:34,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:34,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:52:34,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:52:34,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-22 21:52:34,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-22 21:52:34,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:34,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-22 21:52:34,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:34,638 INFO L124 PetriNetUnfolderBase]: 1589/2583 cut-off events. [2024-11-22 21:52:34,639 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-22 21:52:34,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 2583 events. 1589/2583 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15377 event pairs, 1210 based on Foata normal form. 0/1917 useless extension candidates. Maximal degree in co-relation 4754. Up to 2157 conditions per place. [2024-11-22 21:52:34,660 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-22 21:52:34,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 218 flow [2024-11-22 21:52:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:52:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:52:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-22 21:52:34,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48046875 [2024-11-22 21:52:34,664 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 120 flow. Second operand 4 states and 123 transitions. [2024-11-22 21:52:34,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 218 flow [2024-11-22 21:52:34,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:52:34,667 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 143 flow [2024-11-22 21:52:34,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-11-22 21:52:34,668 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2024-11-22 21:52:34,669 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 143 flow [2024-11-22 21:52:34,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-22 21:52:34,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:34,670 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:52:34,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:52:34,671 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:34,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash 18832013, now seen corresponding path program 1 times [2024-11-22 21:52:34,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:34,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655088908] [2024-11-22 21:52:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:34,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:34,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655088908] [2024-11-22 21:52:34,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655088908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:34,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:34,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:52:34,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474106996] [2024-11-22 21:52:34,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:34,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:52:34,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:34,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:52:34,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:52:34,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-22 21:52:34,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-22 21:52:34,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:34,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-22 21:52:34,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:35,094 INFO L124 PetriNetUnfolderBase]: 1591/2593 cut-off events. [2024-11-22 21:52:35,095 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-22 21:52:35,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 2593 events. 1591/2593 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15431 event pairs, 1210 based on Foata normal form. 0/1928 useless extension candidates. Maximal degree in co-relation 4765. Up to 2155 conditions per place. [2024-11-22 21:52:35,117 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-22 21:52:35,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 261 flow [2024-11-22 21:52:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:52:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:52:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-22 21:52:35,119 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55078125 [2024-11-22 21:52:35,120 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 143 flow. Second operand 4 states and 141 transitions. [2024-11-22 21:52:35,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 261 flow [2024-11-22 21:52:35,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:52:35,122 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 196 flow [2024-11-22 21:52:35,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-11-22 21:52:35,123 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2024-11-22 21:52:35,123 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 196 flow [2024-11-22 21:52:35,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-22 21:52:35,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:35,124 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:52:35,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:52:35,124 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:35,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash 583755680, now seen corresponding path program 1 times [2024-11-22 21:52:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:35,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572215131] [2024-11-22 21:52:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:35,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:35,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:35,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572215131] [2024-11-22 21:52:35,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572215131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:35,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584941050] [2024-11-22 21:52:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:35,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:35,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:35,391 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) [2024-11-22 21:52:35,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:52:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:35,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:52:35,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:35,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:52:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:35,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:35,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584941050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:35,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:35,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:52:35,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928555621] [2024-11-22 21:52:35,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:35,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:52:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:52:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:52:35,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-22 21:52:35,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 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) [2024-11-22 21:52:35,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:35,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-22 21:52:35,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:36,310 INFO L124 PetriNetUnfolderBase]: 1592/2595 cut-off events. [2024-11-22 21:52:36,311 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-22 21:52:36,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4854 conditions, 2595 events. 1592/2595 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15452 event pairs, 1210 based on Foata normal form. 0/1935 useless extension candidates. Maximal degree in co-relation 4770. Up to 2164 conditions per place. [2024-11-22 21:52:36,329 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-22 21:52:36,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 315 flow [2024-11-22 21:52:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:52:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:52:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-11-22 21:52:36,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39453125 [2024-11-22 21:52:36,335 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 196 flow. Second operand 8 states and 202 transitions. [2024-11-22 21:52:36,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 315 flow [2024-11-22 21:52:36,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:52:36,338 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 227 flow [2024-11-22 21:52:36,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-11-22 21:52:36,340 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-11-22 21:52:36,340 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 227 flow [2024-11-22 21:52:36,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 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) [2024-11-22 21:52:36,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:36,341 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:52:36,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:52:36,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:36,543 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:36,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash 916558703, now seen corresponding path program 1 times [2024-11-22 21:52:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:36,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454111911] [2024-11-22 21:52:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:36,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:36,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:36,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454111911] [2024-11-22 21:52:36,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454111911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:36,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84592522] [2024-11-22 21:52:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:36,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:36,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:36,747 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) [2024-11-22 21:52:36,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:52:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:36,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:52:36,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:36,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:52:36,951 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:52:36,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-22 21:52:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:36,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:37,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84592522] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:37,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:37,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-22 21:52:37,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834753393] [2024-11-22 21:52:37,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:37,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:37,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:37,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:37,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:52:37,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-22 21:52:37,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-22 21:52:37,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:37,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-22 21:52:37,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:37,773 INFO L124 PetriNetUnfolderBase]: 3176/5161 cut-off events. [2024-11-22 21:52:37,773 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-22 21:52:37,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 5161 events. 3176/5161 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34576 event pairs, 2420 based on Foata normal form. 2/3848 useless extension candidates. Maximal degree in co-relation 4811. Up to 2158 conditions per place. [2024-11-22 21:52:37,807 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 77 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-11-22 21:52:37,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 480 flow [2024-11-22 21:52:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-22 21:52:37,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-22 21:52:37,809 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 227 flow. Second operand 5 states and 180 transitions. [2024-11-22 21:52:37,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 480 flow [2024-11-22 21:52:37,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 438 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-22 21:52:37,812 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 221 flow [2024-11-22 21:52:37,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-11-22 21:52:37,813 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-11-22 21:52:37,813 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 221 flow [2024-11-22 21:52:37,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-22 21:52:37,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:37,814 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:37,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:52:38,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:38,019 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:38,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:38,020 INFO L85 PathProgramCache]: Analyzing trace with hash 344637380, now seen corresponding path program 1 times [2024-11-22 21:52:38,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:38,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882207860] [2024-11-22 21:52:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:38,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:38,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:38,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882207860] [2024-11-22 21:52:38,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882207860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:38,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718654200] [2024-11-22 21:52:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:38,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:38,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:38,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:52:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:38,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:52:38,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:38,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:38,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718654200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:38,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:38,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:52:38,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206467164] [2024-11-22 21:52:38,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:38,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:52:38,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:38,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:52:38,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:52:38,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-22 21:52:38,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:38,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:38,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-22 21:52:38,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:39,369 INFO L124 PetriNetUnfolderBase]: 4764/7744 cut-off events. [2024-11-22 21:52:39,369 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-11-22 21:52:39,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14423 conditions, 7744 events. 4764/7744 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 50395 event pairs, 3630 based on Foata normal form. 2/5771 useless extension candidates. Maximal degree in co-relation 4785. Up to 4290 conditions per place. [2024-11-22 21:52:39,420 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 70 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-11-22 21:52:39,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 113 transitions, 571 flow [2024-11-22 21:52:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:52:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:52:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 298 transitions. [2024-11-22 21:52:39,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-11-22 21:52:39,423 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 221 flow. Second operand 9 states and 298 transitions. [2024-11-22 21:52:39,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 113 transitions, 571 flow [2024-11-22 21:52:39,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:52:39,428 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 373 flow [2024-11-22 21:52:39,428 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-11-22 21:52:39,429 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2024-11-22 21:52:39,429 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 373 flow [2024-11-22 21:52:39,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:39,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:39,430 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:39,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:52:39,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:39,635 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:39,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1482732715, now seen corresponding path program 1 times [2024-11-22 21:52:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:39,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728987631] [2024-11-22 21:52:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:39,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:39,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728987631] [2024-11-22 21:52:39,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728987631] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:39,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:39,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:52:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815488382] [2024-11-22 21:52:39,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:39,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:39,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:52:39,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-22 21:52:39,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 373 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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) [2024-11-22 21:52:39,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:39,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-22 21:52:39,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:40,696 INFO L124 PetriNetUnfolderBase]: 6124/10015 cut-off events. [2024-11-22 21:52:40,696 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2024-11-22 21:52:40,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 10015 events. 6124/10015 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 68369 event pairs, 4224 based on Foata normal form. 0/7093 useless extension candidates. Maximal degree in co-relation 6865. Up to 5273 conditions per place. [2024-11-22 21:52:40,757 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 97 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-11-22 21:52:40,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 729 flow [2024-11-22 21:52:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:52:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:52:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-11-22 21:52:40,759 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-22 21:52:40,759 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 373 flow. Second operand 6 states and 228 transitions. [2024-11-22 21:52:40,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 729 flow [2024-11-22 21:52:40,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 659 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:40,765 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 361 flow [2024-11-22 21:52:40,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-11-22 21:52:40,767 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2024-11-22 21:52:40,768 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 361 flow [2024-11-22 21:52:40,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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) [2024-11-22 21:52:40,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:40,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:40,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:52:40,769 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:40,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1073711366, now seen corresponding path program 1 times [2024-11-22 21:52:40,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:40,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951123431] [2024-11-22 21:52:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:40,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:40,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951123431] [2024-11-22 21:52:40,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951123431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:40,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:40,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:52:40,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014509954] [2024-11-22 21:52:40,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:40,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:40,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:40,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:52:40,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-22 21:52:40,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2024-11-22 21:52:40,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:40,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-22 21:52:40,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:41,673 INFO L124 PetriNetUnfolderBase]: 4074/6689 cut-off events. [2024-11-22 21:52:41,673 INFO L125 PetriNetUnfolderBase]: For 1340/1646 co-relation queries the response was YES. [2024-11-22 21:52:41,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13541 conditions, 6689 events. 4074/6689 cut-off events. For 1340/1646 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 39523 event pairs, 2922 based on Foata normal form. 0/5076 useless extension candidates. Maximal degree in co-relation 5556. Up to 4727 conditions per place. [2024-11-22 21:52:41,725 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 80 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-11-22 21:52:41,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 653 flow [2024-11-22 21:52:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:52:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:52:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-22 21:52:41,727 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-11-22 21:52:41,727 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 361 flow. Second operand 6 states and 211 transitions. [2024-11-22 21:52:41,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 653 flow [2024-11-22 21:52:41,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 621 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:52:41,733 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 387 flow [2024-11-22 21:52:41,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-22 21:52:41,736 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2024-11-22 21:52:41,737 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 387 flow [2024-11-22 21:52:41,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2024-11-22 21:52:41,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:41,738 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-22 21:52:41,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:52:41,738 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:41,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash -626935898, now seen corresponding path program 2 times [2024-11-22 21:52:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:41,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695271247] [2024-11-22 21:52:41,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:41,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:41,772 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:41,772 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695271247] [2024-11-22 21:52:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695271247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454482808] [2024-11-22 21:52:41,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:41,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:41,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:41,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:41,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:52:42,041 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:42,042 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:42,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:52:42,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:42,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:52:42,205 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:52:42,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-22 21:52:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:42,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:42,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454482808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:42,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:42,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-22 21:52:42,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438962087] [2024-11-22 21:52:42,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:42,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:52:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:42,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:52:42,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:52:42,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-22 21:52:42,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 387 flow. Second operand has 16 states, 16 states have (on average 20.75) internal successors, (332), 16 states have internal predecessors, (332), 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) [2024-11-22 21:52:42,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:42,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-22 21:52:42,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:44,272 INFO L124 PetriNetUnfolderBase]: 5983/9321 cut-off events. [2024-11-22 21:52:44,272 INFO L125 PetriNetUnfolderBase]: For 3043/3515 co-relation queries the response was YES. [2024-11-22 21:52:44,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20705 conditions, 9321 events. 5983/9321 cut-off events. For 3043/3515 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 61165 event pairs, 4893 based on Foata normal form. 4/7169 useless extension candidates. Maximal degree in co-relation 7484. Up to 5124 conditions per place. [2024-11-22 21:52:44,336 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 76 selfloop transitions, 35 changer transitions 0/123 dead transitions. [2024-11-22 21:52:44,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 771 flow [2024-11-22 21:52:44,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:52:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:52:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2024-11-22 21:52:44,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43892045454545453 [2024-11-22 21:52:44,339 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 387 flow. Second operand 11 states and 309 transitions. [2024-11-22 21:52:44,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 771 flow [2024-11-22 21:52:44,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 720 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:44,352 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 467 flow [2024-11-22 21:52:44,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=467, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-11-22 21:52:44,354 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2024-11-22 21:52:44,354 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 467 flow [2024-11-22 21:52:44,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.75) internal successors, (332), 16 states have internal predecessors, (332), 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) [2024-11-22 21:52:44,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:44,356 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:44,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:44,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:44,557 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:44,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341589, now seen corresponding path program 1 times [2024-11-22 21:52:44,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:44,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673328644] [2024-11-22 21:52:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:44,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673328644] [2024-11-22 21:52:44,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673328644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:44,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:44,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:52:44,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896341298] [2024-11-22 21:52:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:44,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:52:44,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:44,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:52:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:52:44,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-22 21:52:44,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-11-22 21:52:44,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:44,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-22 21:52:44,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:45,222 INFO L124 PetriNetUnfolderBase]: 4768/7556 cut-off events. [2024-11-22 21:52:45,222 INFO L125 PetriNetUnfolderBase]: For 2524/2893 co-relation queries the response was YES. [2024-11-22 21:52:45,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16796 conditions, 7556 events. 4768/7556 cut-off events. For 2524/2893 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48050 event pairs, 3825 based on Foata normal form. 0/6127 useless extension candidates. Maximal degree in co-relation 6051. Up to 6601 conditions per place. [2024-11-22 21:52:45,268 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 62 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-11-22 21:52:45,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 609 flow [2024-11-22 21:52:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:52:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:52:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-22 21:52:45,269 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-22 21:52:45,269 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 467 flow. Second operand 4 states and 116 transitions. [2024-11-22 21:52:45,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 609 flow [2024-11-22 21:52:45,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 564 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-22 21:52:45,280 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 440 flow [2024-11-22 21:52:45,281 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-11-22 21:52:45,282 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2024-11-22 21:52:45,282 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 440 flow [2024-11-22 21:52:45,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-11-22 21:52:45,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:45,282 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:45,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:52:45,284 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:45,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:45,284 INFO L85 PathProgramCache]: Analyzing trace with hash 26888348, now seen corresponding path program 1 times [2024-11-22 21:52:45,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:45,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517518070] [2024-11-22 21:52:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:45,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:45,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:45,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517518070] [2024-11-22 21:52:45,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517518070] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:45,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:45,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:52:45,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654516666] [2024-11-22 21:52:45,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:45,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:45,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:52:45,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-22 21:52:45,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-11-22 21:52:45,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:45,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-22 21:52:45,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:45,911 INFO L124 PetriNetUnfolderBase]: 4081/6427 cut-off events. [2024-11-22 21:52:45,911 INFO L125 PetriNetUnfolderBase]: For 1977/2304 co-relation queries the response was YES. [2024-11-22 21:52:45,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14257 conditions, 6427 events. 4081/6427 cut-off events. For 1977/2304 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39548 event pairs, 3245 based on Foata normal form. 0/5296 useless extension candidates. Maximal degree in co-relation 5270. Up to 5635 conditions per place. [2024-11-22 21:52:45,947 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 58 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-11-22 21:52:45,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 580 flow [2024-11-22 21:52:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-22 21:52:45,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-11-22 21:52:45,948 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 440 flow. Second operand 5 states and 129 transitions. [2024-11-22 21:52:45,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 580 flow [2024-11-22 21:52:45,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:52:45,964 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 452 flow [2024-11-22 21:52:45,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-11-22 21:52:45,965 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2024-11-22 21:52:45,965 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 452 flow [2024-11-22 21:52:45,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-11-22 21:52:45,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:45,966 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:45,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:52:45,966 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:52:45,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:45,966 INFO L85 PathProgramCache]: Analyzing trace with hash 26888349, now seen corresponding path program 1 times [2024-11-22 21:52:45,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:45,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510122107] [2024-11-22 21:52:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:45,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:46,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:46,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510122107] [2024-11-22 21:52:46,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510122107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:46,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115825307] [2024-11-22 21:52:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:46,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:46,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:46,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:52:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:46,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-22 21:52:46,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:46,424 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 [2024-11-22 21:52:46,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:52:46,489 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:52:46,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-22 21:52:46,511 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:52:46,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:52:46,627 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-22 21:52:46,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-22 21:52:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:47,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:47,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115825307] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:47,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:47,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-22 21:52:47,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127912728] [2024-11-22 21:52:47,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:47,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:52:47,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:52:47,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:52:47,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-22 21:52:47,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 452 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:47,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:47,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-22 21:52:47,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:51,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:00,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:04,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:08,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:12,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:16,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:20,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:24,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:25,218 INFO L124 PetriNetUnfolderBase]: 6453/10742 cut-off events. [2024-11-22 21:53:25,218 INFO L125 PetriNetUnfolderBase]: For 2988/3411 co-relation queries the response was YES. [2024-11-22 21:53:25,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23376 conditions, 10742 events. 6453/10742 cut-off events. For 2988/3411 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 77763 event pairs, 3477 based on Foata normal form. 0/8399 useless extension candidates. Maximal degree in co-relation 8575. Up to 5378 conditions per place. [2024-11-22 21:53:25,301 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 90 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-11-22 21:53:25,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 125 transitions, 812 flow [2024-11-22 21:53:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-22 21:53:25,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5111607142857143 [2024-11-22 21:53:25,303 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 452 flow. Second operand 7 states and 229 transitions. [2024-11-22 21:53:25,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 125 transitions, 812 flow [2024-11-22 21:53:25,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 794 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:25,322 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 531 flow [2024-11-22 21:53:25,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=531, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-11-22 21:53:25,323 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2024-11-22 21:53:25,324 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 531 flow [2024-11-22 21:53:25,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:25,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:25,324 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:25,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:53:25,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 21:53:25,529 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:53:25,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:25,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341588, now seen corresponding path program 1 times [2024-11-22 21:53:25,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:25,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638922114] [2024-11-22 21:53:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:25,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638922114] [2024-11-22 21:53:25,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638922114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:25,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:25,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:53:25,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051126366] [2024-11-22 21:53:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:25,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:25,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:25,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-22 21:53:25,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 531 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 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) [2024-11-22 21:53:25,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:25,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-22 21:53:25,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:26,158 INFO L124 PetriNetUnfolderBase]: 5527/8751 cut-off events. [2024-11-22 21:53:26,158 INFO L125 PetriNetUnfolderBase]: For 11983/13435 co-relation queries the response was YES. [2024-11-22 21:53:26,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22926 conditions, 8751 events. 5527/8751 cut-off events. For 11983/13435 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 55724 event pairs, 3790 based on Foata normal form. 0/7007 useless extension candidates. Maximal degree in co-relation 8141. Up to 6689 conditions per place. [2024-11-22 21:53:26,211 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 78 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-11-22 21:53:26,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 837 flow [2024-11-22 21:53:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:53:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:53:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-11-22 21:53:26,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-11-22 21:53:26,213 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 531 flow. Second operand 6 states and 199 transitions. [2024-11-22 21:53:26,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 837 flow [2024-11-22 21:53:26,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 833 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:26,226 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 585 flow [2024-11-22 21:53:26,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2024-11-22 21:53:26,226 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 31 predicate places. [2024-11-22 21:53:26,227 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 585 flow [2024-11-22 21:53:26,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 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) [2024-11-22 21:53:26,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:26,227 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:26,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:53:26,227 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:53:26,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash 833539475, now seen corresponding path program 1 times [2024-11-22 21:53:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418731036] [2024-11-22 21:53:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:26,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418731036] [2024-11-22 21:53:26,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418731036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:26,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034166443] [2024-11-22 21:53:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:26,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:26,429 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:26,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:53:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:26,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:53:26,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:26,511 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 [2024-11-22 21:53:26,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:53:26,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:53:26,569 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:53:26,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:53:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:26,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:26,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-22 21:53:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034166443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:26,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:53:26,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506881489] [2024-11-22 21:53:26,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:26,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:53:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:53:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:53:27,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-22 21:53:27,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 585 flow. Second operand has 13 states, 13 states have (on average 20.46153846153846) internal successors, (266), 13 states have internal predecessors, (266), 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) [2024-11-22 21:53:27,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:27,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-22 21:53:27,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:27,936 INFO L124 PetriNetUnfolderBase]: 6547/10770 cut-off events. [2024-11-22 21:53:27,936 INFO L125 PetriNetUnfolderBase]: For 9178/10525 co-relation queries the response was YES. [2024-11-22 21:53:27,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27694 conditions, 10770 events. 6547/10770 cut-off events. For 9178/10525 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 75429 event pairs, 3556 based on Foata normal form. 342/9279 useless extension candidates. Maximal degree in co-relation 15679. Up to 6165 conditions per place. [2024-11-22 21:53:27,986 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 89 selfloop transitions, 27 changer transitions 0/126 dead transitions. [2024-11-22 21:53:27,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 951 flow [2024-11-22 21:53:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-11-22 21:53:27,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2024-11-22 21:53:27,988 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 585 flow. Second operand 8 states and 230 transitions. [2024-11-22 21:53:27,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 951 flow [2024-11-22 21:53:27,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 126 transitions, 915 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:28,000 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 618 flow [2024-11-22 21:53:28,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=618, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2024-11-22 21:53:28,001 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 36 predicate places. [2024-11-22 21:53:28,001 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 618 flow [2024-11-22 21:53:28,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.46153846153846) internal successors, (266), 13 states have internal predecessors, (266), 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) [2024-11-22 21:53:28,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:28,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:28,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:28,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:28,202 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:53:28,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:28,203 INFO L85 PathProgramCache]: Analyzing trace with hash 833539474, now seen corresponding path program 1 times [2024-11-22 21:53:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:28,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535416620] [2024-11-22 21:53:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:28,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535416620] [2024-11-22 21:53:28,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535416620] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:28,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:28,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:53:28,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393271380] [2024-11-22 21:53:28,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:28,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:28,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:28,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-22 21:53:28,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 618 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-11-22 21:53:28,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:28,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-22 21:53:28,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:28,837 INFO L124 PetriNetUnfolderBase]: 4951/8472 cut-off events. [2024-11-22 21:53:28,837 INFO L125 PetriNetUnfolderBase]: For 16151/17117 co-relation queries the response was YES. [2024-11-22 21:53:28,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23886 conditions, 8472 events. 4951/8472 cut-off events. For 16151/17117 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 58949 event pairs, 3649 based on Foata normal form. 516/7743 useless extension candidates. Maximal degree in co-relation 13982. Up to 6724 conditions per place. [2024-11-22 21:53:28,887 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 60 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-11-22 21:53:28,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 768 flow [2024-11-22 21:53:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-22 21:53:28,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-22 21:53:28,888 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 618 flow. Second operand 5 states and 128 transitions. [2024-11-22 21:53:28,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 768 flow [2024-11-22 21:53:28,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 87 transitions, 727 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:28,903 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 607 flow [2024-11-22 21:53:28,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=607, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2024-11-22 21:53:28,904 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2024-11-22 21:53:28,904 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 607 flow [2024-11-22 21:53:28,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-11-22 21:53:28,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:28,904 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:28,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:53:28,904 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:53:28,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash 19190444, now seen corresponding path program 1 times [2024-11-22 21:53:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:28,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206712746] [2024-11-22 21:53:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:29,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:29,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206712746] [2024-11-22 21:53:29,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206712746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:29,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946544519] [2024-11-22 21:53:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:29,217 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:29,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:53:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:29,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-22 21:53:29,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:29,312 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 [2024-11-22 21:53:29,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:53:29,381 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:53:29,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:53:29,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 21:53:29,523 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-22 21:53:29,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-22 21:53:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:29,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:30,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946544519] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:30,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:53:30,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-22 21:53:30,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115965999] [2024-11-22 21:53:30,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:30,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:53:30,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:53:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:30,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-22 21:53:30,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 607 flow. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 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) [2024-11-22 21:53:30,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:30,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-22 21:53:30,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:34,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:39,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:43,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:47,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:51,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:53:56,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:54:00,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]