./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-dot-product.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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:26:55,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:26:55,780 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:26:55,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:26:55,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:26:55,821 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:26:55,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:26:55,822 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:26:55,823 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:26:55,825 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:26:55,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:26:55,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:26:55,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:26:55,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:26:55,828 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:26:55,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:26:55,829 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:26:55,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:26:55,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:26:55,830 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:26:55,830 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:26:55,833 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:26:55,833 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:26:55,833 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:26:55,834 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:26:55,834 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:26:55,834 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:26:55,835 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:26:55,835 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:26:55,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:26:55,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:26:55,836 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:26:55,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:26:55,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:26:55,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:26:55,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:26:55,837 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:26:55,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:26:55,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:26:55,838 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:26:55,838 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:26:55,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:26:55,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-11-12 16:26:56,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:26:56,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:26:56,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:26:56,123 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:26:56,123 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:26:56,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-12 16:26:57,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:26:57,709 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:26:57,709 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-12 16:26:57,717 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b57148d/cbf774ce3b20474ba09c97c48da3e505/FLAG529cdb2d1 [2024-11-12 16:26:58,091 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b57148d/cbf774ce3b20474ba09c97c48da3e505 [2024-11-12 16:26:58,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:26:58,094 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:26:58,096 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:26:58,096 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:26:58,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:26:58,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60561241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58, skipping insertion in model container [2024-11-12 16:26:58,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,133 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:26:58,427 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:26:58,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:26:58,444 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:26:58,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:26:58,519 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:26:58,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58 WrapperNode [2024-11-12 16:26:58,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:26:58,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:26:58,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:26:58,522 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:26:58,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,570 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 274 [2024-11-12 16:26:58,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:26:58,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:26:58,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:26:58,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:26:58,582 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,589 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,606 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-12 16:26:58,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,618 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,620 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,624 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:26:58,625 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:26:58,626 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:26:58,626 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:26:58,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (1/1) ... [2024-11-12 16:26:58,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:26:58,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:26:58,664 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) [2024-11-12 16:26:58,666 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 [2024-11-12 16:26:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:26:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:26:58,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:26:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:26:58,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:26:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:26:58,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:26:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:26:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:26:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:26:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:26:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 16:26:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 16:26:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:26:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:26:58,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:26:58,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:26:58,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:26:58,708 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:26:58,817 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:26:58,818 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:26:59,316 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:26:59,316 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:26:59,691 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:26:59,693 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-12 16:26:59,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:26:59 BoogieIcfgContainer [2024-11-12 16:26:59,694 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:26:59,697 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:26:59,697 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:26:59,700 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:26:59,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:26:58" (1/3) ... [2024-11-12 16:26:59,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41be65cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:26:59, skipping insertion in model container [2024-11-12 16:26:59,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:26:58" (2/3) ... [2024-11-12 16:26:59,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41be65cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:26:59, skipping insertion in model container [2024-11-12 16:26:59,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:26:59" (3/3) ... [2024-11-12 16:26:59,705 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-12 16:26:59,719 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:26:59,719 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-12 16:26:59,719 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:26:59,783 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:26:59,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 79 transitions, 179 flow [2024-11-12 16:26:59,857 INFO L124 PetriNetUnfolderBase]: 11/76 cut-off events. [2024-11-12 16:26:59,857 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:26:59,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 11/76 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 225 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-12 16:26:59,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 79 transitions, 179 flow [2024-11-12 16:26:59,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 75 transitions, 168 flow [2024-11-12 16:26:59,877 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:26:59,883 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6c3a0067, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:26:59,884 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-11-12 16:26:59,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:26:59,887 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:26:59,887 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:26:59,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:26:59,888 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:26:59,888 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:26:59,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:26:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash 876999, now seen corresponding path program 1 times [2024-11-12 16:26:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:26:59,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855115059] [2024-11-12 16:26:59,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:26:59,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:00,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:00,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855115059] [2024-11-12 16:27:00,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855115059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:00,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:00,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:27:00,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672636436] [2024-11-12 16:27:00,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:00,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:27:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:27:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:27:00,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-12 16:27:00,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2024-11-12 16:27:00,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:00,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-12 16:27:00,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:01,184 INFO L124 PetriNetUnfolderBase]: 4704/6952 cut-off events. [2024-11-12 16:27:01,184 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-11-12 16:27:01,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13669 conditions, 6952 events. 4704/6952 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39695 event pairs, 3616 based on Foata normal form. 544/5512 useless extension candidates. Maximal degree in co-relation 12988. Up to 6434 conditions per place. [2024-11-12 16:27:01,247 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 45 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-11-12 16:27:01,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 248 flow [2024-11-12 16:27:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:27:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:27:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-12 16:27:01,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.540084388185654 [2024-11-12 16:27:01,262 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 168 flow. Second operand 3 states and 128 transitions. [2024-11-12 16:27:01,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 248 flow [2024-11-12 16:27:01,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:27:01,276 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 146 flow [2024-11-12 16:27:01,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-11-12 16:27:01,283 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-12 16:27:01,286 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 146 flow [2024-11-12 16:27:01,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2024-11-12 16:27:01,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:01,287 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:27:01,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:27:01,288 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:01,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash 877000, now seen corresponding path program 1 times [2024-11-12 16:27:01,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:01,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448099622] [2024-11-12 16:27:01,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:01,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:01,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:01,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448099622] [2024-11-12 16:27:01,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448099622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:01,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:01,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:27:01,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666096753] [2024-11-12 16:27:01,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:01,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:27:01,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:01,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:27:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:27:01,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-12 16:27:01,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 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) [2024-11-12 16:27:01,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:01,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-12 16:27:01,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:02,422 INFO L124 PetriNetUnfolderBase]: 4705/6955 cut-off events. [2024-11-12 16:27:02,423 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-12 16:27:02,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13495 conditions, 6955 events. 4705/6955 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39699 event pairs, 3616 based on Foata normal form. 0/4969 useless extension candidates. Maximal degree in co-relation 13466. Up to 6443 conditions per place. [2024-11-12 16:27:02,472 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 48 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2024-11-12 16:27:02,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 256 flow [2024-11-12 16:27:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:27:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:27:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-12 16:27:02,476 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48417721518987344 [2024-11-12 16:27:02,476 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 146 flow. Second operand 4 states and 153 transitions. [2024-11-12 16:27:02,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 256 flow [2024-11-12 16:27:02,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:27:02,480 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 169 flow [2024-11-12 16:27:02,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-11-12 16:27:02,481 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-11-12 16:27:02,481 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 169 flow [2024-11-12 16:27:02,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 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) [2024-11-12 16:27:02,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:02,482 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:27:02,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:27:02,482 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:02,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:02,483 INFO L85 PathProgramCache]: Analyzing trace with hash 27187897, now seen corresponding path program 1 times [2024-11-12 16:27:02,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:02,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647741938] [2024-11-12 16:27:02,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:02,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:02,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:02,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647741938] [2024-11-12 16:27:02,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647741938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:02,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:02,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:27:02,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631232115] [2024-11-12 16:27:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:02,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:27:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:27:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:27:02,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-12 16:27:02,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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) [2024-11-12 16:27:02,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:02,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-12 16:27:02,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:03,397 INFO L124 PetriNetUnfolderBase]: 4706/6958 cut-off events. [2024-11-12 16:27:03,398 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-12 16:27:03,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13512 conditions, 6958 events. 4706/6958 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39719 event pairs, 3616 based on Foata normal form. 0/4971 useless extension candidates. Maximal degree in co-relation 13487. Up to 6442 conditions per place. [2024-11-12 16:27:03,433 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 48 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-11-12 16:27:03,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 285 flow [2024-11-12 16:27:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:27:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:27:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-11-12 16:27:03,436 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4582278481012658 [2024-11-12 16:27:03,436 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 169 flow. Second operand 5 states and 181 transitions. [2024-11-12 16:27:03,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 285 flow [2024-11-12 16:27:03,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:27:03,438 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 203 flow [2024-11-12 16:27:03,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-11-12 16:27:03,439 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-12 16:27:03,440 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 203 flow [2024-11-12 16:27:03,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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) [2024-11-12 16:27:03,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:03,440 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:27:03,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:27:03,441 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:03,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:03,441 INFO L85 PathProgramCache]: Analyzing trace with hash 842825437, now seen corresponding path program 1 times [2024-11-12 16:27:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81808896] [2024-11-12 16:27:03,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:03,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:03,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:03,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81808896] [2024-11-12 16:27:03,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81808896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:03,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239647236] [2024-11-12 16:27:03,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:03,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:03,674 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) [2024-11-12 16:27:03,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:27:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:03,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:27:03,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:03,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 16:27:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:04,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:04,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239647236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:04,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:04,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:27:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74404954] [2024-11-12 16:27:04,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:04,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:27:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:27:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:27:04,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-12 16:27:04,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 203 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 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) [2024-11-12 16:27:04,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:04,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-12 16:27:04,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:05,451 INFO L124 PetriNetUnfolderBase]: 4706/6957 cut-off events. [2024-11-12 16:27:05,452 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-12 16:27:05,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13525 conditions, 6957 events. 4706/6957 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39656 event pairs, 3616 based on Foata normal form. 0/4973 useless extension candidates. Maximal degree in co-relation 13497. Up to 6442 conditions per place. [2024-11-12 16:27:05,489 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 47 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-12 16:27:05,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 307 flow [2024-11-12 16:27:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:27:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:27:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2024-11-12 16:27:05,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42616033755274263 [2024-11-12 16:27:05,491 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 203 flow. Second operand 6 states and 202 transitions. [2024-11-12 16:27:05,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 307 flow [2024-11-12 16:27:05,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:27:05,496 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 212 flow [2024-11-12 16:27:05,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-11-12 16:27:05,497 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2024-11-12 16:27:05,498 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 212 flow [2024-11-12 16:27:05,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 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) [2024-11-12 16:27:05,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:05,499 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-12 16:27:05,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:27:05,703 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 [2024-11-12 16:27:05,704 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:05,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash 357793356, now seen corresponding path program 1 times [2024-11-12 16:27:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:05,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367486460] [2024-11-12 16:27:05,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:05,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367486460] [2024-11-12 16:27:05,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367486460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450425430] [2024-11-12 16:27:05,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:05,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:05,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:05,913 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) [2024-11-12 16:27:05,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:27:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:05,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:27:05,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:06,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 16:27:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:06,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:06,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450425430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:06,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:06,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:27:06,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709486341] [2024-11-12 16:27:06,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:06,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:27:06,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:06,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:27:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:27:06,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-12 16:27:06,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 212 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 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) [2024-11-12 16:27:06,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:06,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-12 16:27:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:07,506 INFO L124 PetriNetUnfolderBase]: 4706/6956 cut-off events. [2024-11-12 16:27:07,507 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-12 16:27:07,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13529 conditions, 6956 events. 4706/6956 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39773 event pairs, 3616 based on Foata normal form. 0/4973 useless extension candidates. Maximal degree in co-relation 13496. Up to 6434 conditions per place. [2024-11-12 16:27:07,552 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 41 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-12 16:27:07,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 314 flow [2024-11-12 16:27:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:27:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:27:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-12 16:27:07,554 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4141048824593128 [2024-11-12 16:27:07,554 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 212 flow. Second operand 7 states and 229 transitions. [2024-11-12 16:27:07,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 314 flow [2024-11-12 16:27:07,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 280 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-12 16:27:07,557 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 198 flow [2024-11-12 16:27:07,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-12 16:27:07,558 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-12 16:27:07,558 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 198 flow [2024-11-12 16:27:07,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 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) [2024-11-12 16:27:07,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:07,559 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:07,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 16:27:07,763 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 [2024-11-12 16:27:07,764 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:07,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:07,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1789986825, now seen corresponding path program 1 times [2024-11-12 16:27:07,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:07,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475383021] [2024-11-12 16:27:07,765 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:07,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:07,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475383021] [2024-11-12 16:27:07,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475383021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:07,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:07,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:27:07,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663185622] [2024-11-12 16:27:07,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:07,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:27:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:27:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:27:07,851 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-12 16:27:07,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2024-11-12 16:27:07,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:07,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-12 16:27:07,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:08,313 INFO L124 PetriNetUnfolderBase]: 4706/6960 cut-off events. [2024-11-12 16:27:08,314 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-12 16:27:08,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13538 conditions, 6960 events. 4706/6960 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39738 event pairs, 3616 based on Foata normal form. 1/4978 useless extension candidates. Maximal degree in co-relation 13480. Up to 6443 conditions per place. [2024-11-12 16:27:08,351 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 50 selfloop transitions, 2 changer transitions 5/76 dead transitions. [2024-11-12 16:27:08,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 338 flow [2024-11-12 16:27:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:27:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:27:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-12 16:27:08,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4835443037974684 [2024-11-12 16:27:08,354 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 198 flow. Second operand 5 states and 191 transitions. [2024-11-12 16:27:08,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 338 flow [2024-11-12 16:27:08,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 303 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-12 16:27:08,356 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 181 flow [2024-11-12 16:27:08,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-11-12 16:27:08,357 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2024-11-12 16:27:08,357 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 181 flow [2024-11-12 16:27:08,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2024-11-12 16:27:08,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:08,358 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:08,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:27:08,358 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:08,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1311800692, now seen corresponding path program 1 times [2024-11-12 16:27:08,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:08,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91810872] [2024-11-12 16:27:08,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:08,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91810872] [2024-11-12 16:27:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91810872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244862339] [2024-11-12 16:27:08,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:08,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:08,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:08,544 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) [2024-11-12 16:27:08,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:27:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:08,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:27:08,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:08,634 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 [2024-11-12 16:27:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:27:08,676 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 [2024-11-12 16:27:08,689 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:27:08,690 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 [2024-11-12 16:27:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:08,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:08,815 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 [2024-11-12 16:27:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:08,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244862339] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:08,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:08,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-12 16:27:08,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765167404] [2024-11-12 16:27:08,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:08,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 16:27:08,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:08,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 16:27:08,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-12 16:27:12,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:27:16,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:27:20,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:27:25,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:27:29,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:27:33,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:27:37,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:27:41,214 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] [2024-11-12 16:27:41,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 79 [2024-11-12 16:27:41,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 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) [2024-11-12 16:27:41,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:41,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 79 [2024-11-12 16:27:41,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:43,000 INFO L124 PetriNetUnfolderBase]: 17109/24014 cut-off events. [2024-11-12 16:27:43,001 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-11-12 16:27:43,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47683 conditions, 24014 events. 17109/24014 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 145608 event pairs, 5608 based on Foata normal form. 0/16498 useless extension candidates. Maximal degree in co-relation 47674. Up to 9896 conditions per place. [2024-11-12 16:27:43,151 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 119 selfloop transitions, 11 changer transitions 0/140 dead transitions. [2024-11-12 16:27:43,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 140 transitions, 583 flow [2024-11-12 16:27:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:27:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:27:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 277 transitions. [2024-11-12 16:27:43,156 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38959212376933894 [2024-11-12 16:27:43,156 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 181 flow. Second operand 9 states and 277 transitions. [2024-11-12 16:27:43,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 140 transitions, 583 flow [2024-11-12 16:27:43,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 140 transitions, 573 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-12 16:27:43,160 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 213 flow [2024-11-12 16:27:43,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=213, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2024-11-12 16:27:43,162 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2024-11-12 16:27:43,162 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 213 flow [2024-11-12 16:27:43,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 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) [2024-11-12 16:27:43,163 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:43,163 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:43,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:27:43,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:43,364 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:43,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1311800693, now seen corresponding path program 1 times [2024-11-12 16:27:43,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:43,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014933204] [2024-11-12 16:27:43,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:27:43,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:43,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014933204] [2024-11-12 16:27:43,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014933204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:43,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:43,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:27:43,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281741427] [2024-11-12 16:27:43,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:43,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:27:43,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:27:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:27:43,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 79 [2024-11-12 16:27:43,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2024-11-12 16:27:43,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:43,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 79 [2024-11-12 16:27:43,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:44,261 INFO L124 PetriNetUnfolderBase]: 11413/15792 cut-off events. [2024-11-12 16:27:44,261 INFO L125 PetriNetUnfolderBase]: For 3297/3461 co-relation queries the response was YES. [2024-11-12 16:27:44,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34020 conditions, 15792 events. 11413/15792 cut-off events. For 3297/3461 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 80720 event pairs, 8968 based on Foata normal form. 443/12533 useless extension candidates. Maximal degree in co-relation 33973. Up to 15520 conditions per place. [2024-11-12 16:27:44,328 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 54 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-12 16:27:44,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 317 flow [2024-11-12 16:27:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:27:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:27:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-12 16:27:44,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34430379746835443 [2024-11-12 16:27:44,329 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 213 flow. Second operand 5 states and 136 transitions. [2024-11-12 16:27:44,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 317 flow [2024-11-12 16:27:44,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:27:44,335 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 204 flow [2024-11-12 16:27:44,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-12 16:27:44,337 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-12 16:27:44,338 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 204 flow [2024-11-12 16:27:44,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2024-11-12 16:27:44,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:44,338 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:44,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:27:44,339 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:44,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2064976755, now seen corresponding path program 1 times [2024-11-12 16:27:44,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:44,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424541700] [2024-11-12 16:27:44,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:44,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:44,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:44,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424541700] [2024-11-12 16:27:44,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424541700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:44,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128090319] [2024-11-12 16:27:44,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:44,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:44,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:44,431 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) [2024-11-12 16:27:44,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:27:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:44,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:27:44,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:44,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:44,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128090319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:44,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:44,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:27:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215452674] [2024-11-12 16:27:44,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:44,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:27:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:27:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:27:44,737 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-12 16:27:44,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 204 flow. Second operand has 14 states, 14 states have (on average 27.857142857142858) internal successors, (390), 14 states have internal predecessors, (390), 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) [2024-11-12 16:27:44,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:44,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-12 16:27:44,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:45,700 INFO L124 PetriNetUnfolderBase]: 11738/16909 cut-off events. [2024-11-12 16:27:45,700 INFO L125 PetriNetUnfolderBase]: For 3729/3761 co-relation queries the response was YES. [2024-11-12 16:27:45,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36325 conditions, 16909 events. 11738/16909 cut-off events. For 3729/3761 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 100956 event pairs, 8408 based on Foata normal form. 0/12463 useless extension candidates. Maximal degree in co-relation 28422. Up to 12669 conditions per place. [2024-11-12 16:27:45,781 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 110 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-11-12 16:27:45,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 138 transitions, 685 flow [2024-11-12 16:27:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:27:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:27:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 349 transitions. [2024-11-12 16:27:45,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4908579465541491 [2024-11-12 16:27:45,784 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 204 flow. Second operand 9 states and 349 transitions. [2024-11-12 16:27:45,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 138 transitions, 685 flow [2024-11-12 16:27:45,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 138 transitions, 675 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:27:45,790 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 325 flow [2024-11-12 16:27:45,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2024-11-12 16:27:45,791 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2024-11-12 16:27:45,792 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 325 flow [2024-11-12 16:27:45,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.857142857142858) internal successors, (390), 14 states have internal predecessors, (390), 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) [2024-11-12 16:27:45,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:45,793 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:45,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:27:45,994 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 [2024-11-12 16:27:45,994 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:45,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:45,995 INFO L85 PathProgramCache]: Analyzing trace with hash 53933592, now seen corresponding path program 1 times [2024-11-12 16:27:45,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:45,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332295804] [2024-11-12 16:27:45,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:45,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:27:46,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:46,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332295804] [2024-11-12 16:27:46,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332295804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:46,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:46,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:27:46,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605686717] [2024-11-12 16:27:46,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:46,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:27:46,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:46,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:27:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:27:46,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-12 16:27:46,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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) [2024-11-12 16:27:46,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:46,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-12 16:27:46,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:47,771 INFO L124 PetriNetUnfolderBase]: 18727/26885 cut-off events. [2024-11-12 16:27:47,771 INFO L125 PetriNetUnfolderBase]: For 10699/11504 co-relation queries the response was YES. [2024-11-12 16:27:47,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62169 conditions, 26885 events. 18727/26885 cut-off events. For 10699/11504 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 167951 event pairs, 11536 based on Foata normal form. 0/21310 useless extension candidates. Maximal degree in co-relation 45993. Up to 16608 conditions per place. [2024-11-12 16:27:47,891 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 150 selfloop transitions, 12 changer transitions 0/173 dead transitions. [2024-11-12 16:27:47,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 173 transitions, 907 flow [2024-11-12 16:27:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:27:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:27:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 294 transitions. [2024-11-12 16:27:47,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2024-11-12 16:27:47,893 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 325 flow. Second operand 6 states and 294 transitions. [2024-11-12 16:27:47,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 173 transitions, 907 flow [2024-11-12 16:27:47,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 173 transitions, 905 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:27:47,909 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 399 flow [2024-11-12 16:27:47,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2024-11-12 16:27:47,911 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2024-11-12 16:27:47,911 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 399 flow [2024-11-12 16:27:47,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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) [2024-11-12 16:27:47,912 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:47,912 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:47,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:27:47,912 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:47,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash -126598264, now seen corresponding path program 2 times [2024-11-12 16:27:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769809114] [2024-11-12 16:27:47,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:27:48,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769809114] [2024-11-12 16:27:48,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769809114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475704535] [2024-11-12 16:27:48,133 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:27:48,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:48,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:48,134 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) [2024-11-12 16:27:48,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:27:48,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:27:48,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:27:48,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:27:48,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:48,235 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 [2024-11-12 16:27:48,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:27:48,286 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 [2024-11-12 16:27:48,295 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:27:48,295 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 [2024-11-12 16:27:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:27:48,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:48,423 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 [2024-11-12 16:27:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:27:48,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475704535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:48,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:48,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-12 16:27:48,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976685553] [2024-11-12 16:27:48,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:48,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:27:48,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:48,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:27:48,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:27:48,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 79 [2024-11-12 16:27:48,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 399 flow. Second operand has 13 states, 13 states have (on average 24.076923076923077) internal successors, (313), 13 states have internal predecessors, (313), 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) [2024-11-12 16:27:48,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:48,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 79 [2024-11-12 16:27:48,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:52,875 INFO L124 PetriNetUnfolderBase]: 32521/46005 cut-off events. [2024-11-12 16:27:52,875 INFO L125 PetriNetUnfolderBase]: For 35465/37756 co-relation queries the response was YES. [2024-11-12 16:27:52,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115411 conditions, 46005 events. 32521/46005 cut-off events. For 35465/37756 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 295947 event pairs, 7308 based on Foata normal form. 848/36858 useless extension candidates. Maximal degree in co-relation 99777. Up to 15716 conditions per place. [2024-11-12 16:27:53,115 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 202 selfloop transitions, 23 changer transitions 0/235 dead transitions. [2024-11-12 16:27:53,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 235 transitions, 1471 flow [2024-11-12 16:27:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 16:27:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-12 16:27:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 541 transitions. [2024-11-12 16:27:53,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42800632911392406 [2024-11-12 16:27:53,118 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 399 flow. Second operand 16 states and 541 transitions. [2024-11-12 16:27:53,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 235 transitions, 1471 flow [2024-11-12 16:27:53,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 235 transitions, 1461 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:27:53,158 INFO L231 Difference]: Finished difference. Result has 108 places, 91 transitions, 515 flow [2024-11-12 16:27:53,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=515, PETRI_PLACES=108, PETRI_TRANSITIONS=91} [2024-11-12 16:27:53,159 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 34 predicate places. [2024-11-12 16:27:53,159 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 91 transitions, 515 flow [2024-11-12 16:27:53,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.076923076923077) internal successors, (313), 13 states have internal predecessors, (313), 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) [2024-11-12 16:27:53,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:53,160 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:53,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 16:27:53,363 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,SelfDestructingSolverStorable10 [2024-11-12 16:27:53,364 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:27:53,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash 90326572, now seen corresponding path program 1 times [2024-11-12 16:27:53,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:53,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025294391] [2024-11-12 16:27:53,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:53,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:53,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025294391] [2024-11-12 16:27:53,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025294391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:53,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432378267] [2024-11-12 16:27:53,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:53,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:53,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:53,551 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) [2024-11-12 16:27:53,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:27:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:53,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 16:27:53,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:53,643 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 [2024-11-12 16:27:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:27:53,701 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 [2024-11-12 16:27:53,711 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:27:53,711 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 [2024-11-12 16:27:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:53,788 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:27:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432378267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:53,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:27:53,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-12 16:27:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064981585] [2024-11-12 16:27:53,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:53,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:27:53,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:27:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:27:53,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 79 [2024-11-12 16:27:53,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 91 transitions, 515 flow. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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) [2024-11-12 16:27:53,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:53,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 79 [2024-11-12 16:27:53,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:00,142 INFO L124 PetriNetUnfolderBase]: 55649/79825 cut-off events. [2024-11-12 16:28:00,143 INFO L125 PetriNetUnfolderBase]: For 96018/100461 co-relation queries the response was YES. [2024-11-12 16:28:00,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213598 conditions, 79825 events. 55649/79825 cut-off events. For 96018/100461 co-relation queries the response was YES. Maximal size of possible extension queue 2130. Compared 568221 event pairs, 26176 based on Foata normal form. 2380/64780 useless extension candidates. Maximal degree in co-relation 193735. Up to 47196 conditions per place. [2024-11-12 16:28:00,611 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 115 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-11-12 16:28:00,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 137 transitions, 977 flow [2024-11-12 16:28:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:28:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:28:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2024-11-12 16:28:00,613 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46624472573839665 [2024-11-12 16:28:00,613 INFO L175 Difference]: Start difference. First operand has 108 places, 91 transitions, 515 flow. Second operand 6 states and 221 transitions. [2024-11-12 16:28:00,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 137 transitions, 977 flow [2024-11-12 16:28:00,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 137 transitions, 914 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-11-12 16:28:00,691 INFO L231 Difference]: Finished difference. Result has 103 places, 93 transitions, 499 flow [2024-11-12 16:28:00,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=103, PETRI_TRANSITIONS=93} [2024-11-12 16:28:00,692 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 29 predicate places. [2024-11-12 16:28:00,692 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 93 transitions, 499 flow [2024-11-12 16:28:00,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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) [2024-11-12 16:28:00,692 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:00,692 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:00,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:28:00,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:00,893 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:28:00,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash 290569304, now seen corresponding path program 1 times [2024-11-12 16:28:00,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:00,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950445078] [2024-11-12 16:28:00,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:00,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:00,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950445078] [2024-11-12 16:28:00,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950445078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421002564] [2024-11-12 16:28:00,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:00,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:00,989 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) [2024-11-12 16:28:00,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:28:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:01,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:28:01,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:01,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:01,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421002564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:01,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:01,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:28:01,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994974324] [2024-11-12 16:28:01,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:01,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:28:01,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:01,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:28:01,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:28:01,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-12 16:28:01,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 93 transitions, 499 flow. Second operand has 14 states, 14 states have (on average 28.214285714285715) internal successors, (395), 14 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:01,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:01,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-12 16:28:01,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:07,405 INFO L124 PetriNetUnfolderBase]: 54993/81386 cut-off events. [2024-11-12 16:28:07,405 INFO L125 PetriNetUnfolderBase]: For 78898/81647 co-relation queries the response was YES. [2024-11-12 16:28:07,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216453 conditions, 81386 events. 54993/81386 cut-off events. For 78898/81647 co-relation queries the response was YES. Maximal size of possible extension queue 2081. Compared 601711 event pairs, 38864 based on Foata normal form. 1279/66303 useless extension candidates. Maximal degree in co-relation 205040. Up to 67212 conditions per place. [2024-11-12 16:28:08,183 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 136 selfloop transitions, 21 changer transitions 0/168 dead transitions. [2024-11-12 16:28:08,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 1066 flow [2024-11-12 16:28:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:28:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:28:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-11-12 16:28:08,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5077355836849508 [2024-11-12 16:28:08,185 INFO L175 Difference]: Start difference. First operand has 103 places, 93 transitions, 499 flow. Second operand 9 states and 361 transitions. [2024-11-12 16:28:08,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 1066 flow [2024-11-12 16:28:08,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 168 transitions, 1036 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:28:08,299 INFO L231 Difference]: Finished difference. Result has 110 places, 98 transitions, 581 flow [2024-11-12 16:28:08,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=581, PETRI_PLACES=110, PETRI_TRANSITIONS=98} [2024-11-12 16:28:08,300 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2024-11-12 16:28:08,300 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 98 transitions, 581 flow [2024-11-12 16:28:08,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.214285714285715) internal successors, (395), 14 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:08,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:08,300 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:08,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:28:08,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:08,501 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-12 16:28:08,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash -740149077, now seen corresponding path program 1 times [2024-11-12 16:28:08,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:08,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371345056] [2024-11-12 16:28:08,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:28:08,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:08,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371345056] [2024-11-12 16:28:08,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371345056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:08,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159818605] [2024-11-12 16:28:08,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:08,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:08,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:08,678 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:08,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:28:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:08,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:28:08,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:08,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 7 [2024-11-12 16:28:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:28:08,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:08,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 9 [2024-11-12 16:28:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:28:08,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159818605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:08,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:08,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-12 16:28:08,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979597300] [2024-11-12 16:28:08,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:08,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:28:08,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:28:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:28:09,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-12 16:28:09,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 98 transitions, 581 flow. Second operand has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 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) [2024-11-12 16:28:09,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:09,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-12 16:28:09,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:20,342 INFO L124 PetriNetUnfolderBase]: 97413/137757 cut-off events. [2024-11-12 16:28:20,342 INFO L125 PetriNetUnfolderBase]: For 155443/165878 co-relation queries the response was YES. [2024-11-12 16:28:20,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379712 conditions, 137757 events. 97413/137757 cut-off events. For 155443/165878 co-relation queries the response was YES. Maximal size of possible extension queue 2865. Compared 987718 event pairs, 39286 based on Foata normal form. 0/109180 useless extension candidates. Maximal degree in co-relation 352929. Up to 48480 conditions per place.