./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 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-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-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:48:55,410 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:48:55,466 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:48:55,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:48:55,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:48:55,493 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:48:55,495 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:48:55,495 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:48:55,496 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:48:55,498 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:48:55,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:48:55,499 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:48:55,499 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:48:55,499 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:48:55,500 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:48:55,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:48:55,500 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:48:55,500 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:48:55,501 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:48:55,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:48:55,502 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:48:55,504 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:48:55,504 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:48:55,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:48:55,505 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:48:55,505 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:48:55,505 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:48:55,505 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:48:55,505 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:48:55,506 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:48:55,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:48:55,506 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:48:55,506 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:48:55,506 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:48:55,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:48:55,507 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:48:55,507 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:48:55,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:48:55,507 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:48:55,508 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:48:55,508 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:48:55,508 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:48:55,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-11-19 09:48:55,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:48:55,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:48:55,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:48:55,774 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:48:55,775 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:48:55,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-19 09:48:57,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:48:57,332 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:48:57,332 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-19 09:48:57,338 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901eea65e/277406ab985047dca7c4ca1a3e7f826c/FLAGdd55acbe1 [2024-11-19 09:48:57,353 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901eea65e/277406ab985047dca7c4ca1a3e7f826c [2024-11-19 09:48:57,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:48:57,357 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:48:57,358 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:48:57,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:48:57,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:48:57,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24db7e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57, skipping insertion in model container [2024-11-19 09:48:57,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,387 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:48:57,575 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:48:57,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:48:57,593 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:48:57,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:48:57,641 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:48:57,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57 WrapperNode [2024-11-19 09:48:57,642 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:48:57,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:48:57,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:48:57,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:48:57,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,665 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,731 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 274 [2024-11-19 09:48:57,736 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:48:57,737 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:48:57,737 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:48:57,738 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:48:57,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,768 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,792 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]. [2024-11-19 09:48:57,793 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,799 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,804 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:48:57,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:48:57,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:48:57,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:48:57,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (1/1) ... [2024-11-19 09:48:57,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:48:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:57,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:48:57,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:48:57,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:48:57,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:48:57,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:48:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:48:57,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:48:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:48:57,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:48:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:48:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:48:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:48:57,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:48:57,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:48:57,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:48:57,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:48:57,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:48:57,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:48:57,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:48:57,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:48:57,882 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:48:57,996 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:48:57,998 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:48:58,343 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:48:58,345 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:48:58,582 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:48:58,583 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-19 09:48:58,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:48:58 BoogieIcfgContainer [2024-11-19 09:48:58,583 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:48:58,585 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:48:58,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:48:58,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:48:58,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:48:57" (1/3) ... [2024-11-19 09:48:58,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3a2c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:48:58, skipping insertion in model container [2024-11-19 09:48:58,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:48:57" (2/3) ... [2024-11-19 09:48:58,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3a2c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:48:58, skipping insertion in model container [2024-11-19 09:48:58,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:48:58" (3/3) ... [2024-11-19 09:48:58,590 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-19 09:48:58,604 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:48:58,605 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-19 09:48:58,605 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:48:58,663 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:48:58,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 79 transitions, 179 flow [2024-11-19 09:48:58,728 INFO L124 PetriNetUnfolderBase]: 11/76 cut-off events. [2024-11-19 09:48:58,729 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:48:58,733 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. [2024-11-19 09:48:58,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 79 transitions, 179 flow [2024-11-19 09:48:58,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 75 transitions, 168 flow [2024-11-19 09:48:58,747 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:48:58,753 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;@538a4b85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:48:58,753 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-11-19 09:48:58,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:48:58,756 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:48:58,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:48:58,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:58,757 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:48:58,757 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:48:58,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:58,762 INFO L85 PathProgramCache]: Analyzing trace with hash 876999, now seen corresponding path program 1 times [2024-11-19 09:48:58,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:58,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970482891] [2024-11-19 09:48:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:58,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970482891] [2024-11-19 09:48:58,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970482891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:58,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:58,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:48:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749389239] [2024-11-19 09:48:58,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:59,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:48:59,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:48:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:48:59,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-19 09:48:59,161 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) [2024-11-19 09:48:59,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:59,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-19 09:48:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:59,779 INFO L124 PetriNetUnfolderBase]: 4704/6952 cut-off events. [2024-11-19 09:48:59,780 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-11-19 09:48:59,790 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. [2024-11-19 09:48:59,818 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 45 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-11-19 09:48:59,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 248 flow [2024-11-19 09:48:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:48:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:48:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-19 09:48:59,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.540084388185654 [2024-11-19 09:48:59,831 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 168 flow. Second operand 3 states and 128 transitions. [2024-11-19 09:48:59,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 248 flow [2024-11-19 09:48:59,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:48:59,842 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 146 flow [2024-11-19 09:48:59,844 INFO L260 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} [2024-11-19 09:48:59,847 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-19 09:48:59,848 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 146 flow [2024-11-19 09:48:59,848 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) [2024-11-19 09:48:59,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:59,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:48:59,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:48:59,849 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:48:59,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash 877000, now seen corresponding path program 1 times [2024-11-19 09:48:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006318051] [2024-11-19 09:48:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:00,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:00,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006318051] [2024-11-19 09:49:00,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006318051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:00,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:00,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:00,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007274021] [2024-11-19 09:49:00,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:00,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:00,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-19 09:49:00,130 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) [2024-11-19 09:49:00,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:00,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-19 09:49:00,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:00,698 INFO L124 PetriNetUnfolderBase]: 4705/6955 cut-off events. [2024-11-19 09:49:00,698 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-19 09:49:00,703 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. [2024-11-19 09:49:00,729 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 48 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2024-11-19 09:49:00,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 256 flow [2024-11-19 09:49:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-19 09:49:00,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48417721518987344 [2024-11-19 09:49:00,733 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 146 flow. Second operand 4 states and 153 transitions. [2024-11-19 09:49:00,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 256 flow [2024-11-19 09:49:00,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:00,735 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 169 flow [2024-11-19 09:49:00,736 INFO L260 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} [2024-11-19 09:49:00,736 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-11-19 09:49:00,737 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 169 flow [2024-11-19 09:49:00,737 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) [2024-11-19 09:49:00,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:00,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:49:00,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:49:00,738 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:00,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash 27187897, now seen corresponding path program 1 times [2024-11-19 09:49:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:00,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913314754] [2024-11-19 09:49:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:00,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913314754] [2024-11-19 09:49:00,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913314754] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:00,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:00,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398043684] [2024-11-19 09:49:00,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:00,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:00,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:00,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:49:00,953 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-19 09:49:00,953 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) [2024-11-19 09:49:00,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:00,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-19 09:49:00,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:01,512 INFO L124 PetriNetUnfolderBase]: 4706/6958 cut-off events. [2024-11-19 09:49:01,513 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-19 09:49:01,520 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. [2024-11-19 09:49:01,540 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 48 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-11-19 09:49:01,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 285 flow [2024-11-19 09:49:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-11-19 09:49:01,544 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4582278481012658 [2024-11-19 09:49:01,545 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 169 flow. Second operand 5 states and 181 transitions. [2024-11-19 09:49:01,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 285 flow [2024-11-19 09:49:01,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:01,547 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 203 flow [2024-11-19 09:49:01,548 INFO L260 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} [2024-11-19 09:49:01,549 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-19 09:49:01,549 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 203 flow [2024-11-19 09:49:01,549 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) [2024-11-19 09:49:01,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:01,550 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:49:01,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:49:01,550 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:01,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash 842825437, now seen corresponding path program 1 times [2024-11-19 09:49:01,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:01,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721358026] [2024-11-19 09:49:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:01,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:01,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:01,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721358026] [2024-11-19 09:49:01,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721358026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:01,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829665884] [2024-11-19 09:49:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:01,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:01,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:01,698 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) [2024-11-19 09:49:01,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:49:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:01,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:49:01,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:01,808 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 [2024-11-19 09:49:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:01,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:02,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829665884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:02,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:02,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:49:02,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707925656] [2024-11-19 09:49:02,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:02,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:49:02,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:02,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:49:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:49:02,421 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-19 09:49:02,422 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) [2024-11-19 09:49:02,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:02,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-19 09:49:02,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:03,095 INFO L124 PetriNetUnfolderBase]: 4706/6957 cut-off events. [2024-11-19 09:49:03,096 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-19 09:49:03,103 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. [2024-11-19 09:49:03,126 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 47 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-19 09:49:03,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 307 flow [2024-11-19 09:49:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:49:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:49:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2024-11-19 09:49:03,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42616033755274263 [2024-11-19 09:49:03,128 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 203 flow. Second operand 6 states and 202 transitions. [2024-11-19 09:49:03,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 307 flow [2024-11-19 09:49:03,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:03,130 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 212 flow [2024-11-19 09:49:03,130 INFO L260 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} [2024-11-19 09:49:03,131 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2024-11-19 09:49:03,131 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 212 flow [2024-11-19 09:49:03,131 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) [2024-11-19 09:49:03,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:03,131 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:49:03,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:49:03,335 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 [2024-11-19 09:49:03,336 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:03,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash 357793356, now seen corresponding path program 1 times [2024-11-19 09:49:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658511752] [2024-11-19 09:49:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:03,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:03,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:03,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658511752] [2024-11-19 09:49:03,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658511752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:03,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717871364] [2024-11-19 09:49:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:03,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:03,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:03,488 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) [2024-11-19 09:49:03,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:49:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:03,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:49:03,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:03,573 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 [2024-11-19 09:49:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:03,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:03,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717871364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:03,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:03,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:49:03,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715517497] [2024-11-19 09:49:03,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:03,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:49:03,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:49:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:49:04,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-19 09:49:04,271 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) [2024-11-19 09:49:04,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:04,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-19 09:49:04,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:04,826 INFO L124 PetriNetUnfolderBase]: 4706/6956 cut-off events. [2024-11-19 09:49:04,827 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-19 09:49:04,837 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. [2024-11-19 09:49:04,860 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 41 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-19 09:49:04,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 314 flow [2024-11-19 09:49:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:49:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:49:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-19 09:49:04,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4141048824593128 [2024-11-19 09:49:04,861 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 212 flow. Second operand 7 states and 229 transitions. [2024-11-19 09:49:04,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 314 flow [2024-11-19 09:49:04,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 280 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-19 09:49:04,864 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 198 flow [2024-11-19 09:49:04,864 INFO L260 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} [2024-11-19 09:49:04,865 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-19 09:49:04,865 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 198 flow [2024-11-19 09:49:04,865 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) [2024-11-19 09:49:04,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:04,865 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:04,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:49:05,069 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 [2024-11-19 09:49:05,070 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:05,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1789986825, now seen corresponding path program 1 times [2024-11-19 09:49:05,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:05,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830554156] [2024-11-19 09:49:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:05,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:05,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:05,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830554156] [2024-11-19 09:49:05,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830554156] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:05,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:05,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:05,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870008206] [2024-11-19 09:49:05,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:05,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:05,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:05,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-19 09:49:05,134 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) [2024-11-19 09:49:05,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:05,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-19 09:49:05,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:05,530 INFO L124 PetriNetUnfolderBase]: 4706/6960 cut-off events. [2024-11-19 09:49:05,530 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-19 09:49:05,538 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. [2024-11-19 09:49:05,560 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 50 selfloop transitions, 2 changer transitions 5/76 dead transitions. [2024-11-19 09:49:05,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 338 flow [2024-11-19 09:49:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-19 09:49:05,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4835443037974684 [2024-11-19 09:49:05,562 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 198 flow. Second operand 5 states and 191 transitions. [2024-11-19 09:49:05,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 338 flow [2024-11-19 09:49:05,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 303 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-19 09:49:05,563 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 181 flow [2024-11-19 09:49:05,563 INFO L260 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} [2024-11-19 09:49:05,564 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2024-11-19 09:49:05,564 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 181 flow [2024-11-19 09:49:05,564 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) [2024-11-19 09:49:05,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:05,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:05,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:49:05,565 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:05,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:05,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1311800692, now seen corresponding path program 1 times [2024-11-19 09:49:05,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:05,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387131087] [2024-11-19 09:49:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:05,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:05,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387131087] [2024-11-19 09:49:05,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387131087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:05,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56784603] [2024-11-19 09:49:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:05,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:05,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:05,693 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) [2024-11-19 09:49:05,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:49:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:05,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:49:05,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:05,759 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 [2024-11-19 09:49:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:49:05,785 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 [2024-11-19 09:49:05,797 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:49:05,798 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 [2024-11-19 09:49:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:05,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:05,895 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 [2024-11-19 09:49:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:05,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56784603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:05,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:05,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-19 09:49:05,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390982668] [2024-11-19 09:49:05,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:05,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:49:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:49:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:49:09,966 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] [2024-11-19 09:49:13,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:18,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:22,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:26,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:30,240 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] [2024-11-19 09:49:30,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 79 [2024-11-19 09:49:30,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 19.7) internal successors, (197), 10 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:30,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:30,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 79 [2024-11-19 09:49:30,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:31,634 INFO L124 PetriNetUnfolderBase]: 14307/20394 cut-off events. [2024-11-19 09:49:31,635 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-19 09:49:31,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40225 conditions, 20394 events. 14307/20394 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 124198 event pairs, 4566 based on Foata normal form. 0/14028 useless extension candidates. Maximal degree in co-relation 40216. Up to 8272 conditions per place. [2024-11-19 09:49:31,791 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 113 selfloop transitions, 11 changer transitions 0/136 dead transitions. [2024-11-19 09:49:31,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 136 transitions, 563 flow [2024-11-19 09:49:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:49:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:49:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 289 transitions. [2024-11-19 09:49:31,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40646976090014064 [2024-11-19 09:49:31,794 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 181 flow. Second operand 9 states and 289 transitions. [2024-11-19 09:49:31,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 136 transitions, 563 flow [2024-11-19 09:49:31,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 136 transitions, 553 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-19 09:49:31,798 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 213 flow [2024-11-19 09:49:31,799 INFO L260 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} [2024-11-19 09:49:31,799 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2024-11-19 09:49:31,799 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 213 flow [2024-11-19 09:49:31,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 10 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:31,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:31,800 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:31,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:49:32,001 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 [2024-11-19 09:49:32,001 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:32,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1311800693, now seen corresponding path program 1 times [2024-11-19 09:49:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:32,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130770365] [2024-11-19 09:49:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:32,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130770365] [2024-11-19 09:49:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130770365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:32,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:32,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:32,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298680957] [2024-11-19 09:49:32,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:32,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:32,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:32,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 79 [2024-11-19 09:49:32,166 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) [2024-11-19 09:49:32,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:32,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 79 [2024-11-19 09:49:32,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:32,813 INFO L124 PetriNetUnfolderBase]: 11413/15792 cut-off events. [2024-11-19 09:49:32,813 INFO L125 PetriNetUnfolderBase]: For 3297/3461 co-relation queries the response was YES. [2024-11-19 09:49:32,831 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. [2024-11-19 09:49:32,878 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 54 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-19 09:49:32,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 317 flow [2024-11-19 09:49:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-19 09:49:32,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34430379746835443 [2024-11-19 09:49:32,879 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 213 flow. Second operand 5 states and 136 transitions. [2024-11-19 09:49:32,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 317 flow [2024-11-19 09:49:32,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:32,882 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 204 flow [2024-11-19 09:49:32,883 INFO L260 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} [2024-11-19 09:49:32,883 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-19 09:49:32,883 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 204 flow [2024-11-19 09:49:32,883 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) [2024-11-19 09:49:32,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:32,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:32,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:49:32,884 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:32,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2064976755, now seen corresponding path program 1 times [2024-11-19 09:49:32,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:32,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4137681] [2024-11-19 09:49:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:32,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:32,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:32,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4137681] [2024-11-19 09:49:32,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4137681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:32,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289063278] [2024-11-19 09:49:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:32,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:32,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:32,970 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) [2024-11-19 09:49:32,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:49:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:33,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:49:33,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:33,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:33,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289063278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:33,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:33,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:49:33,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735913010] [2024-11-19 09:49:33,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:33,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:49:33,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:49:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:49:33,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-19 09:49:33,265 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) [2024-11-19 09:49:33,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:33,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-19 09:49:33,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:34,226 INFO L124 PetriNetUnfolderBase]: 11738/16909 cut-off events. [2024-11-19 09:49:34,226 INFO L125 PetriNetUnfolderBase]: For 3729/3761 co-relation queries the response was YES. [2024-11-19 09:49:34,250 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. [2024-11-19 09:49:34,301 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 110 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-11-19 09:49:34,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 138 transitions, 685 flow [2024-11-19 09:49:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:49:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:49:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 349 transitions. [2024-11-19 09:49:34,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4908579465541491 [2024-11-19 09:49:34,304 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 204 flow. Second operand 9 states and 349 transitions. [2024-11-19 09:49:34,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 138 transitions, 685 flow [2024-11-19 09:49:34,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 138 transitions, 675 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:34,309 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 325 flow [2024-11-19 09:49:34,309 INFO L260 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} [2024-11-19 09:49:34,309 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2024-11-19 09:49:34,310 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 325 flow [2024-11-19 09:49:34,310 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) [2024-11-19 09:49:34,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:34,312 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:34,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:49:34,515 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 [2024-11-19 09:49:34,516 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:34,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 53933592, now seen corresponding path program 1 times [2024-11-19 09:49:34,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:34,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276787910] [2024-11-19 09:49:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:34,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:34,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:34,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276787910] [2024-11-19 09:49:34,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276787910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:34,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:34,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:49:34,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006670773] [2024-11-19 09:49:34,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:34,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:49:34,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:49:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:49:34,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-19 09:49:34,668 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) [2024-11-19 09:49:34,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:34,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-19 09:49:34,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:36,274 INFO L124 PetriNetUnfolderBase]: 18727/26885 cut-off events. [2024-11-19 09:49:36,274 INFO L125 PetriNetUnfolderBase]: For 10699/11504 co-relation queries the response was YES. [2024-11-19 09:49:36,323 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. [2024-11-19 09:49:36,404 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 150 selfloop transitions, 12 changer transitions 0/173 dead transitions. [2024-11-19 09:49:36,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 173 transitions, 907 flow [2024-11-19 09:49:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:49:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:49:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 294 transitions. [2024-11-19 09:49:36,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2024-11-19 09:49:36,405 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 325 flow. Second operand 6 states and 294 transitions. [2024-11-19 09:49:36,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 173 transitions, 907 flow [2024-11-19 09:49:36,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 173 transitions, 905 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:36,416 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 399 flow [2024-11-19 09:49:36,416 INFO L260 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} [2024-11-19 09:49:36,416 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2024-11-19 09:49:36,416 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 399 flow [2024-11-19 09:49:36,416 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) [2024-11-19 09:49:36,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:36,417 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:36,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:49:36,417 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:36,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash -126598264, now seen corresponding path program 2 times [2024-11-19 09:49:36,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:36,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093710319] [2024-11-19 09:49:36,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:49:36,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:36,433 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:49:36,437 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:49:36,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:36,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093710319] [2024-11-19 09:49:36,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093710319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:36,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:36,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:49:36,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425689610] [2024-11-19 09:49:36,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:36,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:49:36,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:36,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:49:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:49:37,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 79 [2024-11-19 09:49:37,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 399 flow. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:37,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:37,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 79 [2024-11-19 09:49:37,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:40,432 INFO L124 PetriNetUnfolderBase]: 32021/45495 cut-off events. [2024-11-19 09:49:40,433 INFO L125 PetriNetUnfolderBase]: For 35176/36666 co-relation queries the response was YES. [2024-11-19 09:49:40,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114131 conditions, 45495 events. 32021/45495 cut-off events. For 35176/36666 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 299304 event pairs, 14836 based on Foata normal form. 1346/35925 useless extension candidates. Maximal degree in co-relation 98514. Up to 26558 conditions per place. [2024-11-19 09:49:40,712 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 135 selfloop transitions, 13 changer transitions 0/158 dead transitions. [2024-11-19 09:49:40,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 158 transitions, 983 flow [2024-11-19 09:49:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:49:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:49:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 264 transitions. [2024-11-19 09:49:40,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47739602169981915 [2024-11-19 09:49:40,713 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 399 flow. Second operand 7 states and 264 transitions. [2024-11-19 09:49:40,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 158 transitions, 983 flow [2024-11-19 09:49:40,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 158 transitions, 973 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:40,740 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 442 flow [2024-11-19 09:49:40,740 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2024-11-19 09:49:40,741 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2024-11-19 09:49:40,741 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 442 flow [2024-11-19 09:49:40,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:40,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:40,741 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:40,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:49:40,741 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:40,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash 90326572, now seen corresponding path program 1 times [2024-11-19 09:49:40,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:40,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836558073] [2024-11-19 09:49:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:40,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:40,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836558073] [2024-11-19 09:49:40,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836558073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521489471] [2024-11-19 09:49:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:40,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:40,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:40,876 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) [2024-11-19 09:49:40,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:49:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:40,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:49:40,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:40,956 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 [2024-11-19 09:49:41,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:49:41,024 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 [2024-11-19 09:49:41,034 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:49:41,035 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 [2024-11-19 09:49:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:41,137 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:49:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521489471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:41,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:49:41,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-19 09:49:41,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591083508] [2024-11-19 09:49:41,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:41,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:49:41,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:41,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:49:41,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:49:41,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 79 [2024-11-19 09:49:41,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 442 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) [2024-11-19 09:49:41,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:41,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 79 [2024-11-19 09:49:41,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:47,007 INFO L124 PetriNetUnfolderBase]: 52069/75093 cut-off events. [2024-11-19 09:49:47,007 INFO L125 PetriNetUnfolderBase]: For 79457/85784 co-relation queries the response was YES. [2024-11-19 09:49:47,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195009 conditions, 75093 events. 52069/75093 cut-off events. For 79457/85784 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 539427 event pairs, 24814 based on Foata normal form. 3147/61329 useless extension candidates. Maximal degree in co-relation 162364. Up to 44342 conditions per place. [2024-11-19 09:49:47,766 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 109 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2024-11-19 09:49:47,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 131 transitions, 869 flow [2024-11-19 09:49:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:49:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:49:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2024-11-19 09:49:47,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46624472573839665 [2024-11-19 09:49:47,767 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 442 flow. Second operand 6 states and 221 transitions. [2024-11-19 09:49:47,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 131 transitions, 869 flow [2024-11-19 09:49:47,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 131 transitions, 839 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-19 09:49:47,832 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 454 flow [2024-11-19 09:49:47,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2024-11-19 09:49:47,832 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-11-19 09:49:47,833 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 454 flow [2024-11-19 09:49:47,833 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) [2024-11-19 09:49:47,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:47,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:47,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:49:48,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:49:48,037 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:49:48,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash -740149077, now seen corresponding path program 1 times [2024-11-19 09:49:48,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:48,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376526442] [2024-11-19 09:49:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:48,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:48,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:48,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376526442] [2024-11-19 09:49:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376526442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768924286] [2024-11-19 09:49:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:48,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:48,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:48,184 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) [2024-11-19 09:49:48,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:49:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:48,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:49:48,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:48,331 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 [2024-11-19 09:49:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:48,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:48,376 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 [2024-11-19 09:49:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:48,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768924286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:48,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:48,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-19 09:49:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524775042] [2024-11-19 09:49:48,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:48,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:49:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:49:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:49:48,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-19 09:49:48,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 454 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) [2024-11-19 09:49:48,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:48,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-19 09:49:48,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:59,396 INFO L124 PetriNetUnfolderBase]: 95864/135336 cut-off events. [2024-11-19 09:49:59,396 INFO L125 PetriNetUnfolderBase]: For 98113/105543 co-relation queries the response was YES. [2024-11-19 09:50:00,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356192 conditions, 135336 events. 95864/135336 cut-off events. For 98113/105543 co-relation queries the response was YES. Maximal size of possible extension queue 2915. Compared 970967 event pairs, 38661 based on Foata normal form. 1698/108172 useless extension candidates. Maximal degree in co-relation 297211. Up to 48105 conditions per place. [2024-11-19 09:50:00,799 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 290 selfloop transitions, 40 changer transitions 0/342 dead transitions. [2024-11-19 09:50:00,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 342 transitions, 2020 flow [2024-11-19 09:50:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 09:50:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 09:50:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 678 transitions. [2024-11-19 09:50:00,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363924050632911 [2024-11-19 09:50:00,809 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 454 flow. Second operand 16 states and 678 transitions. [2024-11-19 09:50:00,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 342 transitions, 2020 flow [2024-11-19 09:50:01,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 342 transitions, 1978 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:50:01,928 INFO L231 Difference]: Finished difference. Result has 114 places, 104 transitions, 668 flow [2024-11-19 09:50:01,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=668, PETRI_PLACES=114, PETRI_TRANSITIONS=104} [2024-11-19 09:50:01,929 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2024-11-19 09:50:01,929 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 104 transitions, 668 flow [2024-11-19 09:50:01,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-11-19 09:50:01,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:01,930 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:01,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:50:02,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:02,134 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-19 09:50:02,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 290569304, now seen corresponding path program 1 times [2024-11-19 09:50:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:02,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29678496] [2024-11-19 09:50:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:02,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:02,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29678496] [2024-11-19 09:50:02,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29678496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:02,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184787497] [2024-11-19 09:50:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:02,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:02,234 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) [2024-11-19 09:50:02,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:50:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:02,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:50:02,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:02,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:02,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184787497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:02,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:02,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:50:02,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181978359] [2024-11-19 09:50:02,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:02,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:50:02,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:50:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:50:02,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-19 09:50:02,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 104 transitions, 668 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) [2024-11-19 09:50:02,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:02,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-19 09:50:02,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand