./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 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-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-803cd42-m [2024-11-22 21:46:44,484 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:46:44,560 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:46:44,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:46:44,565 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:46:44,589 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:46:44,593 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:46:44,593 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:46:44,594 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:46:44,594 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:46:44,594 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:46:44,595 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:46:44,595 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:46:44,597 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:46:44,597 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:46:44,598 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:46:44,598 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:46:44,598 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:46:44,599 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:46:44,599 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:46:44,599 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:46:44,603 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:46:44,603 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:46:44,603 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:46:44,604 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:46:44,604 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:46:44,604 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:46:44,604 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:46:44,604 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:46:44,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:46:44,605 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:46:44,605 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:46:44,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:46:44,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:46:44,605 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:46:44,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:46:44,606 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:46:44,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:46:44,606 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:46:44,606 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:46:44,606 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:46:44,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:46:44,607 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-11-22 21:46:44,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:46:44,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:46:44,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:46:44,832 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:46:44,832 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:46:44,833 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-22 21:46:46,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:46:46,270 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:46:46,271 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-22 21:46:46,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d83e1b49/db7a694786ae4e00b3f7eff05143b492/FLAG7f08dce9c [2024-11-22 21:46:46,288 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d83e1b49/db7a694786ae4e00b3f7eff05143b492 [2024-11-22 21:46:46,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:46:46,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:46:46,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:46:46,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:46:46,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:46:46,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254193ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46, skipping insertion in model container [2024-11-22 21:46:46,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,315 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:46:46,490 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:46:46,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:46:46,499 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:46:46,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:46:46,547 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:46:46,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46 WrapperNode [2024-11-22 21:46:46,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:46:46,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:46:46,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:46:46,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:46:46,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,563 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,586 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 274 [2024-11-22 21:46:46,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:46:46,587 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:46:46,587 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:46:46,588 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:46:46,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,601 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,621 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]. [2024-11-22 21:46:46,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,647 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:46:46,650 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:46:46,650 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:46:46,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:46:46,651 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (1/1) ... [2024-11-22 21:46:46,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:46:46,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:46:46,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:46:46,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:46:46,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:46:46,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:46:46,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:46:46,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:46:46,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:46:46,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:46:46,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:46:46,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:46:46,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:46:46,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:46:46,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:46:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:46:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:46:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:46:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:46:46,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:46:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:46:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:46:46,715 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:46:46,804 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:46:46,806 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:46:47,183 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:46:47,184 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:46:47,388 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:46:47,388 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-22 21:46:47,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:46:47 BoogieIcfgContainer [2024-11-22 21:46:47,389 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:46:47,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:46:47,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:46:47,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:46:47,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:46:46" (1/3) ... [2024-11-22 21:46:47,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b7d704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:46:47, skipping insertion in model container [2024-11-22 21:46:47,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:46:46" (2/3) ... [2024-11-22 21:46:47,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b7d704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:46:47, skipping insertion in model container [2024-11-22 21:46:47,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:46:47" (3/3) ... [2024-11-22 21:46:47,395 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-22 21:46:47,408 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:46:47,408 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-22 21:46:47,408 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:46:47,466 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:46:47,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 79 transitions, 179 flow [2024-11-22 21:46:47,554 INFO L124 PetriNetUnfolderBase]: 11/76 cut-off events. [2024-11-22 21:46:47,554 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:46:47,565 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. [2024-11-22 21:46:47,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 79 transitions, 179 flow [2024-11-22 21:46:47,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 75 transitions, 168 flow [2024-11-22 21:46:47,580 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:46:47,587 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;@1c69292a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:46:47,588 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-11-22 21:46:47,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:46:47,592 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:46:47,592 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:46:47,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:47,592 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:46:47,593 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:46:47,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash 876999, now seen corresponding path program 1 times [2024-11-22 21:46:47,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:47,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155550539] [2024-11-22 21:46:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:47,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:47,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:47,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155550539] [2024-11-22 21:46:47,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155550539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:46:47,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:46:47,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:46:47,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840358815] [2024-11-22 21:46:47,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:46:47,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:46:47,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:47,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:46:47,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:46:47,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-22 21:46:47,901 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) [2024-11-22 21:46:47,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:47,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-22 21:46:47,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:48,476 INFO L124 PetriNetUnfolderBase]: 4704/6952 cut-off events. [2024-11-22 21:46:48,477 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-11-22 21:46:48,487 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. [2024-11-22 21:46:48,523 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 45 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-11-22 21:46:48,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 248 flow [2024-11-22 21:46:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:46:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:46:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-22 21:46:48,535 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.540084388185654 [2024-11-22 21:46:48,536 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 168 flow. Second operand 3 states and 128 transitions. [2024-11-22 21:46:48,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 248 flow [2024-11-22 21:46:48,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:46:48,545 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 146 flow [2024-11-22 21:46:48,548 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} [2024-11-22 21:46:48,550 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-22 21:46:48,551 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 146 flow [2024-11-22 21:46:48,551 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) [2024-11-22 21:46:48,551 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:48,551 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:46:48,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:46:48,551 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:46:48,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash 877000, now seen corresponding path program 1 times [2024-11-22 21:46:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:48,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265837829] [2024-11-22 21:46:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:48,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:48,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:48,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265837829] [2024-11-22 21:46:48,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265837829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:46:48,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:46:48,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:46:48,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418801275] [2024-11-22 21:46:48,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:46:48,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:46:48,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:48,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:46:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:46:48,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-22 21:46:48,842 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) [2024-11-22 21:46:48,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:48,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-22 21:46:48,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:49,344 INFO L124 PetriNetUnfolderBase]: 4705/6955 cut-off events. [2024-11-22 21:46:49,344 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-22 21:46:49,350 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. [2024-11-22 21:46:49,372 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 48 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2024-11-22 21:46:49,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 256 flow [2024-11-22 21:46:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:46:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:46:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-22 21:46:49,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48417721518987344 [2024-11-22 21:46:49,376 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 146 flow. Second operand 4 states and 153 transitions. [2024-11-22 21:46:49,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 256 flow [2024-11-22 21:46:49,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:46:49,378 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 169 flow [2024-11-22 21:46:49,378 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} [2024-11-22 21:46:49,379 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-11-22 21:46:49,379 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 169 flow [2024-11-22 21:46:49,379 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) [2024-11-22 21:46:49,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:49,379 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:46:49,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:46:49,380 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:46:49,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash 27187897, now seen corresponding path program 1 times [2024-11-22 21:46:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:49,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856234005] [2024-11-22 21:46:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:49,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:49,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:49,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856234005] [2024-11-22 21:46:49,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856234005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:46:49,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:46:49,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:46:49,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199549693] [2024-11-22 21:46:49,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:46:49,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:46:49,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:49,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:46:49,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:46:49,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-22 21:46:49,572 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) [2024-11-22 21:46:49,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:49,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-22 21:46:49,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:50,147 INFO L124 PetriNetUnfolderBase]: 4706/6958 cut-off events. [2024-11-22 21:46:50,147 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-22 21:46:50,155 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. [2024-11-22 21:46:50,180 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 48 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-11-22 21:46:50,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 285 flow [2024-11-22 21:46:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:46:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:46:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-11-22 21:46:50,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4582278481012658 [2024-11-22 21:46:50,190 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 169 flow. Second operand 5 states and 181 transitions. [2024-11-22 21:46:50,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 285 flow [2024-11-22 21:46:50,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:46:50,192 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 203 flow [2024-11-22 21:46:50,193 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} [2024-11-22 21:46:50,193 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-22 21:46:50,193 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 203 flow [2024-11-22 21:46:50,194 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) [2024-11-22 21:46:50,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:50,194 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:46:50,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:46:50,194 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:46:50,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash 842825437, now seen corresponding path program 1 times [2024-11-22 21:46:50,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:50,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710342462] [2024-11-22 21:46:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:50,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:50,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710342462] [2024-11-22 21:46:50,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710342462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:46:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194287866] [2024-11-22 21:46:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:50,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:46:50,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:46:50,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:46:50,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:46:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:50,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:46:50,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:46:50,589 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 [2024-11-22 21:46:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:50,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:46:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:50,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194287866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:46:50,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:46:50,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:46:50,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756943977] [2024-11-22 21:46:50,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:46:50,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:46:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:46:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:46:51,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-22 21:46:51,124 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) [2024-11-22 21:46:51,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:51,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-22 21:46:51,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:51,706 INFO L124 PetriNetUnfolderBase]: 4706/6957 cut-off events. [2024-11-22 21:46:51,707 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-22 21:46:51,714 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. [2024-11-22 21:46:51,732 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 47 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-22 21:46:51,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 307 flow [2024-11-22 21:46:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:46:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:46:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2024-11-22 21:46:51,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42616033755274263 [2024-11-22 21:46:51,734 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 203 flow. Second operand 6 states and 202 transitions. [2024-11-22 21:46:51,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 307 flow [2024-11-22 21:46:51,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:46:51,736 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 212 flow [2024-11-22 21:46:51,736 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} [2024-11-22 21:46:51,736 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2024-11-22 21:46:51,736 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 212 flow [2024-11-22 21:46:51,737 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) [2024-11-22 21:46:51,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:51,737 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-22 21:46:51,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:46:51,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:46:51,942 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:46:51,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash 357793356, now seen corresponding path program 1 times [2024-11-22 21:46:51,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:51,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993688759] [2024-11-22 21:46:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:52,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:52,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993688759] [2024-11-22 21:46:52,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993688759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:46:52,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043121952] [2024-11-22 21:46:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:52,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:46:52,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:46:52,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:46:52,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:46:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:52,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:46:52,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:46:52,168 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 [2024-11-22 21:46:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:52,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:46:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:52,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043121952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:46:52,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:46:52,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:46:52,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65031470] [2024-11-22 21:46:52,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:46:52,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:46:52,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:46:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:46:52,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-22 21:46:52,773 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) [2024-11-22 21:46:52,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:52,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-22 21:46:52,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:53,358 INFO L124 PetriNetUnfolderBase]: 4706/6956 cut-off events. [2024-11-22 21:46:53,358 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-22 21:46:53,367 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. [2024-11-22 21:46:53,386 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 41 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-22 21:46:53,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 314 flow [2024-11-22 21:46:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:46:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:46:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-22 21:46:53,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4141048824593128 [2024-11-22 21:46:53,389 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 212 flow. Second operand 7 states and 229 transitions. [2024-11-22 21:46:53,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 314 flow [2024-11-22 21:46:53,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 280 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-22 21:46:53,391 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 198 flow [2024-11-22 21:46:53,391 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} [2024-11-22 21:46:53,391 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-22 21:46:53,392 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 198 flow [2024-11-22 21:46:53,392 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) [2024-11-22 21:46:53,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:53,392 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:46:53,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 21:46:53,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:46:53,598 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:46:53,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1789986825, now seen corresponding path program 1 times [2024-11-22 21:46:53,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:53,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534989623] [2024-11-22 21:46:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:53,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:53,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534989623] [2024-11-22 21:46:53,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534989623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:46:53,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:46:53,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:46:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178098782] [2024-11-22 21:46:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:46:53,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:46:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:46:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:46:53,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-22 21:46:53,663 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) [2024-11-22 21:46:53,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:53,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-22 21:46:53,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:54,064 INFO L124 PetriNetUnfolderBase]: 4706/6960 cut-off events. [2024-11-22 21:46:54,065 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-22 21:46:54,071 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. [2024-11-22 21:46:54,091 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 50 selfloop transitions, 2 changer transitions 5/76 dead transitions. [2024-11-22 21:46:54,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 338 flow [2024-11-22 21:46:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:46:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:46:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-22 21:46:54,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4835443037974684 [2024-11-22 21:46:54,093 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 198 flow. Second operand 5 states and 191 transitions. [2024-11-22 21:46:54,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 338 flow [2024-11-22 21:46:54,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 303 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-22 21:46:54,096 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 181 flow [2024-11-22 21:46:54,097 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} [2024-11-22 21:46:54,098 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2024-11-22 21:46:54,098 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 181 flow [2024-11-22 21:46:54,098 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) [2024-11-22 21:46:54,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:54,098 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:46:54,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:46:54,099 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:46:54,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:54,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1311800692, now seen corresponding path program 1 times [2024-11-22 21:46:54,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:54,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971899248] [2024-11-22 21:46:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:54,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:54,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971899248] [2024-11-22 21:46:54,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971899248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:46:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170436053] [2024-11-22 21:46:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:54,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:46:54,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:46:54,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:46:54,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:46:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:54,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:46:54,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:46:54,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:46:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:46:54,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:46:54,336 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:46:54,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:46:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:54,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:46:54,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-22 21:46:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170436053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:46:54,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:46:54,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-22 21:46:54,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824151166] [2024-11-22 21:46:54,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:46:54,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:46:54,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:46:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:46:58,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:47:02,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:47:06,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:47:10,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:47:14,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:47:14,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 79 [2024-11-22 21:47:14,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:14,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:14,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 79 [2024-11-22 21:47:14,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:16,171 INFO L124 PetriNetUnfolderBase]: 12958/18403 cut-off events. [2024-11-22 21:47:16,171 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-11-22 21:47:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36325 conditions, 18403 events. 12958/18403 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 109571 event pairs, 4055 based on Foata normal form. 0/12537 useless extension candidates. Maximal degree in co-relation 36316. Up to 7480 conditions per place. [2024-11-22 21:47:16,263 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 110 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2024-11-22 21:47:16,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 134 transitions, 553 flow [2024-11-22 21:47:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:47:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:47:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 295 transitions. [2024-11-22 21:47:16,269 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4149085794655415 [2024-11-22 21:47:16,270 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 181 flow. Second operand 9 states and 295 transitions. [2024-11-22 21:47:16,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 134 transitions, 553 flow [2024-11-22 21:47:16,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 134 transitions, 543 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-22 21:47:16,274 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 213 flow [2024-11-22 21:47:16,275 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} [2024-11-22 21:47:16,275 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2024-11-22 21:47:16,275 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 213 flow [2024-11-22 21:47:16,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:16,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:16,275 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:16,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 21:47:16,476 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 [2024-11-22 21:47:16,476 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:47:16,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1311800693, now seen corresponding path program 1 times [2024-11-22 21:47:16,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:16,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654604514] [2024-11-22 21:47:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:16,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:16,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654604514] [2024-11-22 21:47:16,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654604514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:16,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:16,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:16,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101154013] [2024-11-22 21:47:16,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:16,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:16,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:16,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 79 [2024-11-22 21:47:16,601 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) [2024-11-22 21:47:16,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:16,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 79 [2024-11-22 21:47:16,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:17,234 INFO L124 PetriNetUnfolderBase]: 11413/15792 cut-off events. [2024-11-22 21:47:17,234 INFO L125 PetriNetUnfolderBase]: For 3297/3461 co-relation queries the response was YES. [2024-11-22 21:47:17,248 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. [2024-11-22 21:47:17,293 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 54 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-22 21:47:17,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 317 flow [2024-11-22 21:47:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-22 21:47:17,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34430379746835443 [2024-11-22 21:47:17,295 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 213 flow. Second operand 5 states and 136 transitions. [2024-11-22 21:47:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 317 flow [2024-11-22 21:47:17,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:17,299 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 204 flow [2024-11-22 21:47:17,300 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} [2024-11-22 21:47:17,301 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-22 21:47:17,302 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 204 flow [2024-11-22 21:47:17,302 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) [2024-11-22 21:47:17,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:17,302 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:17,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:47:17,302 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:47:17,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2064976755, now seen corresponding path program 1 times [2024-11-22 21:47:17,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:17,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806895792] [2024-11-22 21:47:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:17,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:17,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:17,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806895792] [2024-11-22 21:47:17,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806895792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:17,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782001375] [2024-11-22 21:47:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:17,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:17,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:17,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:47:17,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:47:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:17,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:47:17,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:17,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:17,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782001375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:17,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:17,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:47:17,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244702975] [2024-11-22 21:47:17,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:17,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:47:17,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:17,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:47:17,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:47:17,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-22 21:47:17,591 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) [2024-11-22 21:47:17,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:17,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-22 21:47:17,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:18,467 INFO L124 PetriNetUnfolderBase]: 11738/16909 cut-off events. [2024-11-22 21:47:18,467 INFO L125 PetriNetUnfolderBase]: For 3729/3761 co-relation queries the response was YES. [2024-11-22 21:47:18,495 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. [2024-11-22 21:47:18,548 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 110 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-11-22 21:47:18,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 138 transitions, 685 flow [2024-11-22 21:47:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:47:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:47:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 349 transitions. [2024-11-22 21:47:18,550 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4908579465541491 [2024-11-22 21:47:18,550 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 204 flow. Second operand 9 states and 349 transitions. [2024-11-22 21:47:18,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 138 transitions, 685 flow [2024-11-22 21:47:18,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 138 transitions, 675 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:18,553 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 325 flow [2024-11-22 21:47:18,553 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} [2024-11-22 21:47:18,557 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2024-11-22 21:47:18,557 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 325 flow [2024-11-22 21:47:18,558 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) [2024-11-22 21:47:18,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:18,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:18,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:47:18,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:18,758 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:47:18,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 53933592, now seen corresponding path program 1 times [2024-11-22 21:47:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:18,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631058917] [2024-11-22 21:47:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:18,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:18,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631058917] [2024-11-22 21:47:18,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631058917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:18,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:18,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:47:18,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048823732] [2024-11-22 21:47:18,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:18,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:47:18,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:18,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:47:18,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:47:18,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-22 21:47:18,972 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) [2024-11-22 21:47:18,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:18,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-22 21:47:18,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:20,600 INFO L124 PetriNetUnfolderBase]: 18727/26885 cut-off events. [2024-11-22 21:47:20,601 INFO L125 PetriNetUnfolderBase]: For 10699/11504 co-relation queries the response was YES. [2024-11-22 21:47:20,689 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. [2024-11-22 21:47:21,115 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 150 selfloop transitions, 12 changer transitions 0/173 dead transitions. [2024-11-22 21:47:21,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 173 transitions, 907 flow [2024-11-22 21:47:21,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:47:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:47:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 294 transitions. [2024-11-22 21:47:21,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2024-11-22 21:47:21,118 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 325 flow. Second operand 6 states and 294 transitions. [2024-11-22 21:47:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 173 transitions, 907 flow [2024-11-22 21:47:21,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 173 transitions, 905 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:21,133 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 399 flow [2024-11-22 21:47:21,133 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} [2024-11-22 21:47:21,133 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2024-11-22 21:47:21,133 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 399 flow [2024-11-22 21:47:21,133 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) [2024-11-22 21:47:21,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:21,134 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:21,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:47:21,134 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:47:21,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash -126598264, now seen corresponding path program 2 times [2024-11-22 21:47:21,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420571177] [2024-11-22 21:47:21,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:21,152 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:47:21,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:47:21,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:21,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420571177] [2024-11-22 21:47:21,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420571177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:21,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:21,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:21,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87068896] [2024-11-22 21:47:21,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:21,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:47:21,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:47:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:47:21,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 79 [2024-11-22 21:47:21,667 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) [2024-11-22 21:47:21,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:21,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 79 [2024-11-22 21:47:21,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:24,634 INFO L124 PetriNetUnfolderBase]: 32021/45495 cut-off events. [2024-11-22 21:47:24,634 INFO L125 PetriNetUnfolderBase]: For 35176/36666 co-relation queries the response was YES. [2024-11-22 21:47:24,771 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. [2024-11-22 21:47:24,916 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 135 selfloop transitions, 13 changer transitions 0/158 dead transitions. [2024-11-22 21:47:24,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 158 transitions, 983 flow [2024-11-22 21:47:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:47:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:47:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 264 transitions. [2024-11-22 21:47:24,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47739602169981915 [2024-11-22 21:47:24,918 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 399 flow. Second operand 7 states and 264 transitions. [2024-11-22 21:47:24,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 158 transitions, 983 flow [2024-11-22 21:47:24,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 158 transitions, 973 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:24,944 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 442 flow [2024-11-22 21:47:24,944 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} [2024-11-22 21:47:24,945 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2024-11-22 21:47:24,945 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 442 flow [2024-11-22 21:47:24,945 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) [2024-11-22 21:47:24,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:24,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:24,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:47:24,945 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:47:24,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:24,946 INFO L85 PathProgramCache]: Analyzing trace with hash 90326572, now seen corresponding path program 1 times [2024-11-22 21:47:24,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:24,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918732132] [2024-11-22 21:47:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:24,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:25,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918732132] [2024-11-22 21:47:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918732132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784495915] [2024-11-22 21:47:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:25,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:25,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:25,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:47:25,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:47:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:25,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:47:25,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:25,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:47:25,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:47:25,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 21:47:25,249 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:47:25,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:47:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:25,489 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:47:25,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784495915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:25,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:47:25,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-22 21:47:25,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645856929] [2024-11-22 21:47:25,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:25,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:47:25,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:25,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:47:25,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:47:25,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 79 [2024-11-22 21:47:25,640 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) [2024-11-22 21:47:25,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:25,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 79 [2024-11-22 21:47:25,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:31,009 INFO L124 PetriNetUnfolderBase]: 52069/75093 cut-off events. [2024-11-22 21:47:31,009 INFO L125 PetriNetUnfolderBase]: For 79457/85784 co-relation queries the response was YES. [2024-11-22 21:47:31,287 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. [2024-11-22 21:47:31,602 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 109 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2024-11-22 21:47:31,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 131 transitions, 869 flow [2024-11-22 21:47:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:47:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:47:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2024-11-22 21:47:31,604 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46624472573839665 [2024-11-22 21:47:31,604 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 442 flow. Second operand 6 states and 221 transitions. [2024-11-22 21:47:31,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 131 transitions, 869 flow [2024-11-22 21:47:31,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 131 transitions, 839 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-22 21:47:31,675 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 454 flow [2024-11-22 21:47:31,675 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} [2024-11-22 21:47:31,676 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-11-22 21:47:31,676 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 454 flow [2024-11-22 21:47:31,676 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) [2024-11-22 21:47:31,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:31,676 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:31,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:47:31,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 21:47:31,877 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:47:31,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash -740149077, now seen corresponding path program 1 times [2024-11-22 21:47:31,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:31,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560382014] [2024-11-22 21:47:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:32,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:32,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560382014] [2024-11-22 21:47:32,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560382014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:32,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722103518] [2024-11-22 21:47:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:32,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:32,016 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:47:32,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:47:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:32,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:47:32,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:32,130 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 [2024-11-22 21:47:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:32,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:32,167 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 [2024-11-22 21:47:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:32,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722103518] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:32,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:32,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-22 21:47:32,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604952291] [2024-11-22 21:47:32,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:32,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:47:32,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:32,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:47:32,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:47:32,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-22 21:47:32,752 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) [2024-11-22 21:47:32,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:32,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-22 21:47:32,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:43,158 INFO L124 PetriNetUnfolderBase]: 95864/135336 cut-off events. [2024-11-22 21:47:43,159 INFO L125 PetriNetUnfolderBase]: For 98113/105543 co-relation queries the response was YES. [2024-11-22 21:47:43,706 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. [2024-11-22 21:47:44,142 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 290 selfloop transitions, 40 changer transitions 0/342 dead transitions. [2024-11-22 21:47:44,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 342 transitions, 2020 flow [2024-11-22 21:47:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:47:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:47:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 678 transitions. [2024-11-22 21:47:44,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363924050632911 [2024-11-22 21:47:44,144 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 454 flow. Second operand 16 states and 678 transitions. [2024-11-22 21:47:44,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 342 transitions, 2020 flow [2024-11-22 21:47:45,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 342 transitions, 1978 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:47:45,555 INFO L231 Difference]: Finished difference. Result has 114 places, 104 transitions, 668 flow [2024-11-22 21:47:45,556 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} [2024-11-22 21:47:45,556 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2024-11-22 21:47:45,556 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 104 transitions, 668 flow [2024-11-22 21:47:45,556 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) [2024-11-22 21:47:45,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:45,557 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:45,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:47:45,757 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 [2024-11-22 21:47:45,758 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-22 21:47:45,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash 290569304, now seen corresponding path program 1 times [2024-11-22 21:47:45,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:45,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645830103] [2024-11-22 21:47:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:45,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:45,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645830103] [2024-11-22 21:47:45,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645830103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:45,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884673707] [2024-11-22 21:47:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:45,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:45,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:45,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:47:45,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:47:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:45,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:47:45,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:45,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:45,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884673707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:45,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:45,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:47:45,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300845949] [2024-11-22 21:47:45,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:45,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:47:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:47:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:47:46,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-22 21:47:46,031 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) [2024-11-22 21:47:46,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:46,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-22 21:47:46,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand