./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum2.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 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:28:36,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:28:36,495 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:28:36,502 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:28:36,505 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:28:36,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:28:36,533 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:28:36,534 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:28:36,534 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:28:36,535 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:28:36,536 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:28:36,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:28:36,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:28:36,537 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:28:36,539 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:28:36,540 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:28:36,540 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:28:36,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:28:36,540 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:28:36,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:28:36,541 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:28:36,545 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:28:36,546 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:28:36,546 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:28:36,546 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:28:36,546 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:28:36,547 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:28:36,547 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:28:36,547 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:28:36,547 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:28:36,548 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:28:36,548 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:28:36,548 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:28:36,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:28:36,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:28:36,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:28:36,551 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:28:36,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:28:36,552 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:28:36,552 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:28:36,552 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:28:36,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:28:36,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 [2024-11-12 16:28:36,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:28:36,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:28:36,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:28:36,823 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:28:36,824 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:28:36,825 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-12 16:28:38,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:28:38,503 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:28:38,504 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-12 16:28:38,512 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b764c42d7/419cf85879ae422f98c534e90c7d5fe3/FLAG40ec46eca [2024-11-12 16:28:38,527 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b764c42d7/419cf85879ae422f98c534e90c7d5fe3 [2024-11-12 16:28:38,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:28:38,531 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:28:38,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:28:38,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:28:38,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:28:38,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:38,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5698da00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38, skipping insertion in model container [2024-11-12 16:28:38,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:38,566 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:28:38,809 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:28:38,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:28:38,829 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:28:38,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:28:38,886 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:28:38,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38 WrapperNode [2024-11-12 16:28:38,887 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:28:38,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:28:38,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:28:38,889 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:28:38,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:38,901 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:38,952 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 266 [2024-11-12 16:28:38,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:28:38,959 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:28:38,960 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:28:38,960 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:28:38,971 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:38,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:38,980 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:39,015 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-12 16:28:39,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:39,016 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:39,033 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:39,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:39,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:39,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:39,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:28:39,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:28:39,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:28:39,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:28:39,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (1/1) ... [2024-11-12 16:28:39,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:28:39,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:39,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 16:28:39,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 16:28:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:28:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:28:39,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:28:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:28:39,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:28:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:28:39,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:28:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:28:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:28:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:28:39,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:28:39,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 16:28:39,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 16:28:39,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:28:39,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:28:39,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:28:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:28:39,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:28:39,146 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:28:39,280 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:28:39,283 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:28:39,774 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:28:39,774 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:28:40,210 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:28:40,210 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-12 16:28:40,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:28:40 BoogieIcfgContainer [2024-11-12 16:28:40,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:28:40,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:28:40,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:28:40,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:28:40,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:28:38" (1/3) ... [2024-11-12 16:28:40,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f4af18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:28:40, skipping insertion in model container [2024-11-12 16:28:40,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:38" (2/3) ... [2024-11-12 16:28:40,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f4af18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:28:40, skipping insertion in model container [2024-11-12 16:28:40,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:28:40" (3/3) ... [2024-11-12 16:28:40,220 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2024-11-12 16:28:40,239 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:28:40,239 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-12 16:28:40,239 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:28:40,305 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:28:40,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 55 transitions, 131 flow [2024-11-12 16:28:40,381 INFO L124 PetriNetUnfolderBase]: 5/52 cut-off events. [2024-11-12 16:28:40,382 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:28:40,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 5/52 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 105 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-11-12 16:28:40,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 55 transitions, 131 flow [2024-11-12 16:28:40,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 51 transitions, 120 flow [2024-11-12 16:28:40,400 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:28:40,409 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;@50c261e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:28:40,410 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-12 16:28:40,413 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:28:40,414 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:28:40,414 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:28:40,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:40,415 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:28:40,417 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:40,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash 903750, now seen corresponding path program 1 times [2024-11-12 16:28:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:40,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319468537] [2024-11-12 16:28:40,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:40,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:40,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:40,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319468537] [2024-11-12 16:28:40,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319468537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:40,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:40,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:28:40,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72585069] [2024-11-12 16:28:40,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:40,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:28:40,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:28:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:28:40,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-12 16:28:40,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:40,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:40,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-12 16:28:40,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:41,408 INFO L124 PetriNetUnfolderBase]: 2971/4295 cut-off events. [2024-11-12 16:28:41,408 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-11-12 16:28:41,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8737 conditions, 4295 events. 2971/4295 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 25434 event pairs, 2534 based on Foata normal form. 1/2481 useless extension candidates. Maximal degree in co-relation 8218. Up to 4213 conditions per place. [2024-11-12 16:28:41,449 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 39 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-12 16:28:41,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 194 flow [2024-11-12 16:28:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:28:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:28:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-12 16:28:41,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2024-11-12 16:28:41,464 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 120 flow. Second operand 3 states and 74 transitions. [2024-11-12 16:28:41,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 194 flow [2024-11-12 16:28:41,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:28:41,489 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 104 flow [2024-11-12 16:28:41,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-12 16:28:41,496 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2024-11-12 16:28:41,496 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 104 flow [2024-11-12 16:28:41,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:41,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:41,497 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:28:41,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:28:41,497 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:41,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 903751, now seen corresponding path program 1 times [2024-11-12 16:28:41,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:41,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936351877] [2024-11-12 16:28:41,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:41,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:41,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:41,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936351877] [2024-11-12 16:28:41,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936351877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:41,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:41,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:28:41,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603070] [2024-11-12 16:28:41,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:41,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:41,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:41,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:28:41,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-12 16:28:41,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:41,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:41,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-12 16:28:41,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:42,395 INFO L124 PetriNetUnfolderBase]: 2972/4298 cut-off events. [2024-11-12 16:28:42,395 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:28:42,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8599 conditions, 4298 events. 2972/4298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 25470 event pairs, 2534 based on Foata normal form. 0/2481 useless extension candidates. Maximal degree in co-relation 8570. Up to 4222 conditions per place. [2024-11-12 16:28:42,423 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 42 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-12 16:28:42,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 202 flow [2024-11-12 16:28:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-11-12 16:28:42,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-11-12 16:28:42,426 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 104 flow. Second operand 4 states and 87 transitions. [2024-11-12 16:28:42,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 202 flow [2024-11-12 16:28:42,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:42,429 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 127 flow [2024-11-12 16:28:42,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-11-12 16:28:42,430 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2024-11-12 16:28:42,430 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 127 flow [2024-11-12 16:28:42,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:42,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:42,431 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:28:42,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:28:42,431 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:42,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash 28019329, now seen corresponding path program 1 times [2024-11-12 16:28:42,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:42,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810529135] [2024-11-12 16:28:42,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:42,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810529135] [2024-11-12 16:28:42,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810529135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:42,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:42,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:28:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141327217] [2024-11-12 16:28:42,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:42,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:28:42,572 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-12 16:28:42,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:42,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:42,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-12 16:28:42,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:43,054 INFO L124 PetriNetUnfolderBase]: 2971/4301 cut-off events. [2024-11-12 16:28:43,055 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:28:43,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 4301 events. 2971/4301 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 25503 event pairs, 2534 based on Foata normal form. 1/2487 useless extension candidates. Maximal degree in co-relation 8593. Up to 4219 conditions per place. [2024-11-12 16:28:43,077 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 41 selfloop transitions, 4 changer transitions 1/52 dead transitions. [2024-11-12 16:28:43,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 223 flow [2024-11-12 16:28:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-12 16:28:43,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-11-12 16:28:43,080 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 127 flow. Second operand 4 states and 97 transitions. [2024-11-12 16:28:43,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 223 flow [2024-11-12 16:28:43,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:28:43,082 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 142 flow [2024-11-12 16:28:43,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-11-12 16:28:43,083 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-11-12 16:28:43,083 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 142 flow [2024-11-12 16:28:43,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:43,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:43,083 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:28:43,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:28:43,083 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:43,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash 868533952, now seen corresponding path program 1 times [2024-11-12 16:28:43,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:43,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082360221] [2024-11-12 16:28:43,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082360221] [2024-11-12 16:28:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082360221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880169548] [2024-11-12 16:28:43,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:43,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:43,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:43,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:43,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:28:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:43,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:28:43,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:43,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 16:28:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:43,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:43,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880169548] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:43,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:43,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:28:43,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990604935] [2024-11-12 16:28:43,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:43,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:28:43,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:43,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:28:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:28:43,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-12 16:28:43,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 142 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:43,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:43,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-12 16:28:43,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:44,713 INFO L124 PetriNetUnfolderBase]: 2971/4299 cut-off events. [2024-11-12 16:28:44,713 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:28:44,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8621 conditions, 4299 events. 2971/4299 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 25417 event pairs, 2534 based on Foata normal form. 0/2486 useless extension candidates. Maximal degree in co-relation 8598. Up to 4220 conditions per place. [2024-11-12 16:28:44,743 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 39 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-11-12 16:28:44,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 228 flow [2024-11-12 16:28:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:28:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:28:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-11-12 16:28:44,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-12 16:28:44,746 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 142 flow. Second operand 6 states and 105 transitions. [2024-11-12 16:28:44,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 228 flow [2024-11-12 16:28:44,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 220 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:44,748 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 142 flow [2024-11-12 16:28:44,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-11-12 16:28:44,749 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-11-12 16:28:44,750 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 142 flow [2024-11-12 16:28:44,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:44,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:44,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:28:44,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:28:44,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:44,955 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:44,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:44,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1154751784, now seen corresponding path program 1 times [2024-11-12 16:28:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:44,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485536359] [2024-11-12 16:28:44,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:44,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:45,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:45,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485536359] [2024-11-12 16:28:45,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485536359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:45,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908388442] [2024-11-12 16:28:45,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:45,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:45,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:45,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:45,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:28:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:45,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:28:45,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:45,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:45,374 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:28:45,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:28:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:45,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908388442] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:45,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:28:45,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-12 16:28:45,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576441412] [2024-11-12 16:28:45,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:45,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:28:45,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:28:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:28:45,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-12 16:28:45,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:45,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:45,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-12 16:28:45,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:45,942 INFO L124 PetriNetUnfolderBase]: 2971/4298 cut-off events. [2024-11-12 16:28:45,943 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:28:45,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8619 conditions, 4298 events. 2971/4298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 25374 event pairs, 2534 based on Foata normal form. 1/2486 useless extension candidates. Maximal degree in co-relation 8594. Up to 4219 conditions per place. [2024-11-12 16:28:45,969 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 42 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-12 16:28:45,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 50 transitions, 236 flow [2024-11-12 16:28:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:28:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:28:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-11-12 16:28:45,970 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3527272727272727 [2024-11-12 16:28:45,971 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 142 flow. Second operand 5 states and 97 transitions. [2024-11-12 16:28:45,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 50 transitions, 236 flow [2024-11-12 16:28:45,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 210 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-12 16:28:45,972 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 128 flow [2024-11-12 16:28:45,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-12 16:28:45,974 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2024-11-12 16:28:45,974 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 128 flow [2024-11-12 16:28:45,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:45,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:45,975 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:45,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:28:46,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:46,176 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:46,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1614932260, now seen corresponding path program 1 times [2024-11-12 16:28:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468654288] [2024-11-12 16:28:46,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:46,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:46,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468654288] [2024-11-12 16:28:46,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468654288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:46,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932181650] [2024-11-12 16:28:46,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:46,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:46,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:46,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:46,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:28:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:46,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:28:46,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:46,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:46,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932181650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:46,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:46,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 16:28:46,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120841716] [2024-11-12 16:28:46,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:46,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:28:46,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:28:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:28:46,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-12 16:28:46,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 128 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:46,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:46,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-12 16:28:46,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:47,342 INFO L124 PetriNetUnfolderBase]: 5941/8594 cut-off events. [2024-11-12 16:28:47,343 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-12 16:28:47,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17208 conditions, 8594 events. 5941/8594 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 53655 event pairs, 5068 based on Foata normal form. 1/5042 useless extension candidates. Maximal degree in co-relation 8590. Up to 4217 conditions per place. [2024-11-12 16:28:47,393 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 74 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-11-12 16:28:47,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 414 flow [2024-11-12 16:28:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:28:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:28:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-11-12 16:28:47,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-11-12 16:28:47,397 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 128 flow. Second operand 8 states and 185 transitions. [2024-11-12 16:28:47,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 414 flow [2024-11-12 16:28:47,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 400 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:28:47,401 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 192 flow [2024-11-12 16:28:47,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-11-12 16:28:47,401 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-11-12 16:28:47,403 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 192 flow [2024-11-12 16:28:47,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:47,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:47,404 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-12 16:28:47,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:28:47,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:47,605 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:47,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:47,606 INFO L85 PathProgramCache]: Analyzing trace with hash -503132085, now seen corresponding path program 2 times [2024-11-12 16:28:47,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:47,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024680072] [2024-11-12 16:28:47,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:47,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:47,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024680072] [2024-11-12 16:28:47,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024680072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:47,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847314672] [2024-11-12 16:28:47,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:28:47,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:47,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:47,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:47,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:28:47,919 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:28:47,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:28:47,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 16:28:47,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:47,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:48,050 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:28:48,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:28:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:48,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:48,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847314672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:48,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:48,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:28:48,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717534560] [2024-11-12 16:28:48,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:48,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:28:48,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:28:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:28:48,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-12 16:28:48,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 192 flow. Second operand has 19 states, 19 states have (on average 11.578947368421053) internal successors, (220), 19 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:48,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:48,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-12 16:28:48,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:50,107 INFO L124 PetriNetUnfolderBase]: 5942/8603 cut-off events. [2024-11-12 16:28:50,107 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-12 16:28:50,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17268 conditions, 8603 events. 5942/8603 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 53773 event pairs, 5068 based on Foata normal form. 4/5054 useless extension candidates. Maximal degree in co-relation 8604. Up to 4220 conditions per place. [2024-11-12 16:28:50,154 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 83 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2024-11-12 16:28:50,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 103 transitions, 536 flow [2024-11-12 16:28:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:28:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:28:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-11-12 16:28:50,156 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35206611570247937 [2024-11-12 16:28:50,156 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 192 flow. Second operand 11 states and 213 transitions. [2024-11-12 16:28:50,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 103 transitions, 536 flow [2024-11-12 16:28:50,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 514 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-11-12 16:28:50,159 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 257 flow [2024-11-12 16:28:50,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=257, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2024-11-12 16:28:50,159 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-11-12 16:28:50,160 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 257 flow [2024-11-12 16:28:50,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.578947368421053) internal successors, (220), 19 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:50,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:50,160 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:50,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:50,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:50,365 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:50,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:50,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1773695154, now seen corresponding path program 1 times [2024-11-12 16:28:50,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:50,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915193413] [2024-11-12 16:28:50,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:50,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:28:50,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:50,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915193413] [2024-11-12 16:28:50,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915193413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:50,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:50,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:28:50,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184458624] [2024-11-12 16:28:50,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:50,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:28:50,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:50,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:28:50,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:28:50,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-12 16:28:50,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:50,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:50,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-12 16:28:50,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:50,958 INFO L124 PetriNetUnfolderBase]: 4066/5923 cut-off events. [2024-11-12 16:28:50,958 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-11-12 16:28:50,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11927 conditions, 5923 events. 4066/5923 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34954 event pairs, 3384 based on Foata normal form. 0/3775 useless extension candidates. Maximal degree in co-relation 11896. Up to 5777 conditions per place. [2024-11-12 16:28:50,991 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 47 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-11-12 16:28:50,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 59 transitions, 359 flow [2024-11-12 16:28:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:28:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:28:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-11-12 16:28:50,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33090909090909093 [2024-11-12 16:28:50,993 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 257 flow. Second operand 5 states and 91 transitions. [2024-11-12 16:28:50,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 59 transitions, 359 flow [2024-11-12 16:28:50,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 339 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-12 16:28:50,995 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 245 flow [2024-11-12 16:28:50,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-11-12 16:28:50,996 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-11-12 16:28:50,997 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 245 flow [2024-11-12 16:28:50,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:50,998 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:50,998 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:50,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:28:50,998 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:50,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:50,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1773695153, now seen corresponding path program 1 times [2024-11-12 16:28:50,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:50,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997368676] [2024-11-12 16:28:50,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:50,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:51,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:51,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997368676] [2024-11-12 16:28:51,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997368676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:51,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967571358] [2024-11-12 16:28:51,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:51,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:51,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:51,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:28:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:51,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 16:28:51,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:51,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:28:51,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:51,292 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:28:51,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:28:51,320 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 31 treesize of output 24 [2024-11-12 16:28:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:28:51,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:28:51,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967571358] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:51,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:28:51,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 11 [2024-11-12 16:28:51,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885707817] [2024-11-12 16:28:51,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:51,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:28:51,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:28:51,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:28:51,797 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-12 16:28:51,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:51,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:51,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-12 16:28:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:52,615 INFO L124 PetriNetUnfolderBase]: 5300/7453 cut-off events. [2024-11-12 16:28:52,615 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-12 16:28:52,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14932 conditions, 7453 events. 5300/7453 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 40513 event pairs, 1858 based on Foata normal form. 0/4717 useless extension candidates. Maximal degree in co-relation 14901. Up to 3796 conditions per place. [2024-11-12 16:28:52,658 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 62 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-11-12 16:28:52,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 455 flow [2024-11-12 16:28:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:28:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:28:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-11-12 16:28:52,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38441558441558443 [2024-11-12 16:28:52,660 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 245 flow. Second operand 7 states and 148 transitions. [2024-11-12 16:28:52,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 455 flow [2024-11-12 16:28:52,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 444 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:28:52,663 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 299 flow [2024-11-12 16:28:52,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=299, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2024-11-12 16:28:52,664 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-11-12 16:28:52,665 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 299 flow [2024-11-12 16:28:52,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:52,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:52,665 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:52,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:28:52,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:52,866 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:52,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1773695152, now seen corresponding path program 1 times [2024-11-12 16:28:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:52,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712714417] [2024-11-12 16:28:52,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:52,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:28:52,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712714417] [2024-11-12 16:28:52,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712714417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:52,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:52,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:28:52,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663713341] [2024-11-12 16:28:52,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:52,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:28:52,930 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-12 16:28:52,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:52,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:52,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-12 16:28:52,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:53,349 INFO L124 PetriNetUnfolderBase]: 3390/4831 cut-off events. [2024-11-12 16:28:53,350 INFO L125 PetriNetUnfolderBase]: For 2582/2582 co-relation queries the response was YES. [2024-11-12 16:28:53,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12138 conditions, 4831 events. 3390/4831 cut-off events. For 2582/2582 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 25440 event pairs, 2480 based on Foata normal form. 0/3609 useless extension candidates. Maximal degree in co-relation 12104. Up to 4681 conditions per place. [2024-11-12 16:28:53,375 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 50 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-11-12 16:28:53,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 59 transitions, 393 flow [2024-11-12 16:28:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-11-12 16:28:53,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-11-12 16:28:53,376 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 299 flow. Second operand 4 states and 78 transitions. [2024-11-12 16:28:53,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 59 transitions, 393 flow [2024-11-12 16:28:53,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 59 transitions, 382 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:28:53,379 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 282 flow [2024-11-12 16:28:53,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-11-12 16:28:53,380 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-11-12 16:28:53,380 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 282 flow [2024-11-12 16:28:53,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:53,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:53,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:53,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:28:53,381 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:53,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:53,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1773695151, now seen corresponding path program 1 times [2024-11-12 16:28:53,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:53,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428994188] [2024-11-12 16:28:53,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:53,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:28:53,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:53,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428994188] [2024-11-12 16:28:53,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428994188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728695736] [2024-11-12 16:28:53,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:53,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:53,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:53,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:28:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:53,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:28:53,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:28:53,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:53,739 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 22 treesize of output 18 [2024-11-12 16:28:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:28:53,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728695736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:53,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:53,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-12 16:28:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164940211] [2024-11-12 16:28:53,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:53,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:28:53,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:28:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:28:53,821 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-12 16:28:53,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 282 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:53,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:53,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-12 16:28:53,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:54,366 INFO L124 PetriNetUnfolderBase]: 3630/5367 cut-off events. [2024-11-12 16:28:54,366 INFO L125 PetriNetUnfolderBase]: For 1581/1581 co-relation queries the response was YES. [2024-11-12 16:28:54,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13272 conditions, 5367 events. 3630/5367 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31055 event pairs, 1760 based on Foata normal form. 0/4237 useless extension candidates. Maximal degree in co-relation 13238. Up to 3341 conditions per place. [2024-11-12 16:28:54,395 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 73 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-11-12 16:28:54,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 540 flow [2024-11-12 16:28:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:28:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:28:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-11-12 16:28:54,397 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-11-12 16:28:54,397 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 282 flow. Second operand 7 states and 161 transitions. [2024-11-12 16:28:54,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 540 flow [2024-11-12 16:28:54,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:54,402 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 311 flow [2024-11-12 16:28:54,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-11-12 16:28:54,403 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-11-12 16:28:54,403 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 311 flow [2024-11-12 16:28:54,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:54,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:54,404 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-12 16:28:54,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:28:54,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:54,605 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:54,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:54,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1821400967, now seen corresponding path program 3 times [2024-11-12 16:28:54,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:54,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855817568] [2024-11-12 16:28:54,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:54,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:54,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:54,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855817568] [2024-11-12 16:28:54,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855817568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:54,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368672685] [2024-11-12 16:28:54,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:28:54,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:54,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:54,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:54,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:28:54,825 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:28:54,825 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:28:54,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 16:28:54,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:54,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:28:54,922 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:28:54,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-12 16:28:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:28:55,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:28:55,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368672685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:55,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:55,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:28:55,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435961691] [2024-11-12 16:28:55,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:55,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:28:55,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:55,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:28:55,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:28:55,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-12 16:28:55,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 311 flow. Second operand has 18 states, 18 states have (on average 11.777777777777779) internal successors, (212), 18 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:55,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:55,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-12 16:28:55,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:56,404 INFO L124 PetriNetUnfolderBase]: 3630/5252 cut-off events. [2024-11-12 16:28:56,404 INFO L125 PetriNetUnfolderBase]: For 6044/6044 co-relation queries the response was YES. [2024-11-12 16:28:56,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14029 conditions, 5252 events. 3630/5252 cut-off events. For 6044/6044 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29554 event pairs, 2840 based on Foata normal form. 3/4263 useless extension candidates. Maximal degree in co-relation 13968. Up to 5094 conditions per place. [2024-11-12 16:28:56,434 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 34 selfloop transitions, 27 changer transitions 0/65 dead transitions. [2024-11-12 16:28:56,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 65 transitions, 473 flow [2024-11-12 16:28:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 16:28:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 16:28:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 231 transitions. [2024-11-12 16:28:56,436 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24705882352941178 [2024-11-12 16:28:56,436 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 311 flow. Second operand 17 states and 231 transitions. [2024-11-12 16:28:56,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 65 transitions, 473 flow [2024-11-12 16:28:56,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 65 transitions, 428 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-12 16:28:56,441 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 359 flow [2024-11-12 16:28:56,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=359, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2024-11-12 16:28:56,442 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-11-12 16:28:56,443 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 359 flow [2024-11-12 16:28:56,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.777777777777779) internal successors, (212), 18 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:56,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:56,444 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:56,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:28:56,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:56,649 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:56,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash 560691521, now seen corresponding path program 1 times [2024-11-12 16:28:56,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:56,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293952808] [2024-11-12 16:28:56,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:56,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:56,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293952808] [2024-11-12 16:28:56,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293952808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:56,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080886061] [2024-11-12 16:28:56,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:56,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:56,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:56,748 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:56,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:28:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:56,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:28:56,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:56,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080886061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:56,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:56,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:28:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682085896] [2024-11-12 16:28:56,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:56,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:28:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:28:56,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:28:56,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:28:56,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 359 flow. Second operand has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:56,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:56,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:28:56,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:57,380 INFO L124 PetriNetUnfolderBase]: 2916/4258 cut-off events. [2024-11-12 16:28:57,381 INFO L125 PetriNetUnfolderBase]: For 2569/2569 co-relation queries the response was YES. [2024-11-12 16:28:57,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10664 conditions, 4258 events. 2916/4258 cut-off events. For 2569/2569 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22134 event pairs, 2027 based on Foata normal form. 0/3399 useless extension candidates. Maximal degree in co-relation 7477. Up to 2972 conditions per place. [2024-11-12 16:28:57,395 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 85 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-11-12 16:28:57,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 110 transitions, 741 flow [2024-11-12 16:28:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:28:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:28:57,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-11-12 16:28:57,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3797979797979798 [2024-11-12 16:28:57,396 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 359 flow. Second operand 9 states and 188 transitions. [2024-11-12 16:28:57,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 110 transitions, 741 flow [2024-11-12 16:28:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 110 transitions, 656 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-11-12 16:28:57,400 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 333 flow [2024-11-12 16:28:57,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=333, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-11-12 16:28:57,401 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-11-12 16:28:57,401 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 333 flow [2024-11-12 16:28:57,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:57,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:57,401 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:57,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:57,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-12 16:28:57,603 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:57,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:57,603 INFO L85 PathProgramCache]: Analyzing trace with hash 831348337, now seen corresponding path program 1 times [2024-11-12 16:28:57,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:57,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341653819] [2024-11-12 16:28:57,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:57,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:57,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:57,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341653819] [2024-11-12 16:28:57,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341653819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:57,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417629110] [2024-11-12 16:28:57,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:57,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:57,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:57,722 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:57,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:28:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:57,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:28:57,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:57,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:57,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417629110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:57,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:57,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:28:57,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656022101] [2024-11-12 16:28:57,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:57,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:28:57,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:57,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:28:57,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:28:57,986 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:28:57,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 333 flow. Second operand has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:57,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:57,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:28:57,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:58,348 INFO L124 PetriNetUnfolderBase]: 2806/4081 cut-off events. [2024-11-12 16:28:58,348 INFO L125 PetriNetUnfolderBase]: For 2230/2365 co-relation queries the response was YES. [2024-11-12 16:28:58,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10515 conditions, 4081 events. 2806/4081 cut-off events. For 2230/2365 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 21457 event pairs, 1937 based on Foata normal form. 44/3399 useless extension candidates. Maximal degree in co-relation 7897. Up to 3140 conditions per place. [2024-11-12 16:28:58,363 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 87 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-11-12 16:28:58,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 114 transitions, 703 flow [2024-11-12 16:28:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:28:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:28:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-11-12 16:28:58,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-12 16:28:58,364 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 333 flow. Second operand 10 states and 209 transitions. [2024-11-12 16:28:58,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 114 transitions, 703 flow [2024-11-12 16:28:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 664 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:28:58,369 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 383 flow [2024-11-12 16:28:58,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=383, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2024-11-12 16:28:58,369 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-11-12 16:28:58,370 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 383 flow [2024-11-12 16:28:58,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:58,370 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:58,370 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:58,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:58,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-12 16:28:58,571 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:28:58,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1926505083, now seen corresponding path program 1 times [2024-11-12 16:28:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:58,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436270954] [2024-11-12 16:28:58,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:58,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:58,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:58,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436270954] [2024-11-12 16:28:58,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436270954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:58,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021978488] [2024-11-12 16:28:58,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:58,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:58,839 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:58,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:28:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:58,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 16:28:58,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:59,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:59,182 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 36 treesize of output 32 [2024-11-12 16:28:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:59,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021978488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:59,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:59,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-12 16:28:59,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420308338] [2024-11-12 16:28:59,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:59,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:28:59,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:28:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:28:59,532 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-12 16:28:59,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 383 flow. Second operand has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:59,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:59,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-12 16:28:59,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:00,284 INFO L124 PetriNetUnfolderBase]: 3221/4791 cut-off events. [2024-11-12 16:29:00,284 INFO L125 PetriNetUnfolderBase]: For 6669/6910 co-relation queries the response was YES. [2024-11-12 16:29:00,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13412 conditions, 4791 events. 3221/4791 cut-off events. For 6669/6910 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26602 event pairs, 1540 based on Foata normal form. 0/3943 useless extension candidates. Maximal degree in co-relation 9314. Up to 2180 conditions per place. [2024-11-12 16:29:00,306 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 108 selfloop transitions, 32 changer transitions 0/144 dead transitions. [2024-11-12 16:29:00,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 999 flow [2024-11-12 16:29:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 16:29:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 16:29:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-11-12 16:29:00,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-11-12 16:29:00,308 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 383 flow. Second operand 14 states and 290 transitions. [2024-11-12 16:29:00,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 999 flow [2024-11-12 16:29:00,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 144 transitions, 952 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-12 16:29:00,315 INFO L231 Difference]: Finished difference. Result has 97 places, 76 transitions, 451 flow [2024-11-12 16:29:00,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=451, PETRI_PLACES=97, PETRI_TRANSITIONS=76} [2024-11-12 16:29:00,316 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-11-12 16:29:00,316 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 76 transitions, 451 flow [2024-11-12 16:29:00,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:00,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:00,316 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:00,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 16:29:00,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-12 16:29:00,520 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:00,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1926505081, now seen corresponding path program 1 times [2024-11-12 16:29:00,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:00,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142047791] [2024-11-12 16:29:00,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:00,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:00,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:00,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142047791] [2024-11-12 16:29:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142047791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475185191] [2024-11-12 16:29:00,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:00,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:00,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:00,742 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:00,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:29:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:00,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 16:29:00,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:00,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:29:00,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:00,936 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:00,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:00,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:29:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:01,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:01,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475185191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:01,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:01,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-12 16:29:01,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117991874] [2024-11-12 16:29:01,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:01,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 16:29:01,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:01,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 16:29:01,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-12 16:29:01,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 55 [2024-11-12 16:29:01,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 76 transitions, 451 flow. Second operand has 17 states, 17 states have (on average 10.058823529411764) internal successors, (171), 17 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:01,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:01,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 55 [2024-11-12 16:29:01,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:02,942 INFO L124 PetriNetUnfolderBase]: 2885/4318 cut-off events. [2024-11-12 16:29:02,942 INFO L125 PetriNetUnfolderBase]: For 7529/7741 co-relation queries the response was YES. [2024-11-12 16:29:02,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13974 conditions, 4318 events. 2885/4318 cut-off events. For 7529/7741 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23459 event pairs, 1251 based on Foata normal form. 137/4034 useless extension candidates. Maximal degree in co-relation 9771. Up to 1812 conditions per place. [2024-11-12 16:29:02,961 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 109 selfloop transitions, 29 changer transitions 0/142 dead transitions. [2024-11-12 16:29:02,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1051 flow [2024-11-12 16:29:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 16:29:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 16:29:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 278 transitions. [2024-11-12 16:29:02,963 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2660287081339713 [2024-11-12 16:29:02,963 INFO L175 Difference]: Start difference. First operand has 97 places, 76 transitions, 451 flow. Second operand 19 states and 278 transitions. [2024-11-12 16:29:02,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1051 flow [2024-11-12 16:29:02,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 142 transitions, 1009 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-12 16:29:02,976 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 499 flow [2024-11-12 16:29:02,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=499, PETRI_PLACES=111, PETRI_TRANSITIONS=78} [2024-11-12 16:29:02,977 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-11-12 16:29:02,977 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 499 flow [2024-11-12 16:29:02,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.058823529411764) internal successors, (171), 17 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:02,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:02,977 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:02,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:03,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 16:29:03,178 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:03,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:03,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1700362050, now seen corresponding path program 2 times [2024-11-12 16:29:03,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:03,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836421785] [2024-11-12 16:29:03,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:03,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:03,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836421785] [2024-11-12 16:29:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836421785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453818890] [2024-11-12 16:29:03,348 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:03,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:03,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:03,350 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:03,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:29:03,425 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:29:03,425 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:03,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-12 16:29:03,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:03,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:03,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:29:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:29:03,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:29:03,514 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:03,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-12 16:29:03,662 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:29:03,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453818890] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:03,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:29:03,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-12 16:29:03,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973340039] [2024-11-12 16:29:03,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:03,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:29:03,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:29:03,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:29:03,731 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-12 16:29:03,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 78 transitions, 499 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:03,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:03,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-12 16:29:03,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:04,435 INFO L124 PetriNetUnfolderBase]: 4815/6905 cut-off events. [2024-11-12 16:29:04,435 INFO L125 PetriNetUnfolderBase]: For 18071/18235 co-relation queries the response was YES. [2024-11-12 16:29:04,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24280 conditions, 6905 events. 4815/6905 cut-off events. For 18071/18235 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 35712 event pairs, 2037 based on Foata normal form. 0/6041 useless extension candidates. Maximal degree in co-relation 19739. Up to 4327 conditions per place. [2024-11-12 16:29:04,471 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 118 selfloop transitions, 14 changer transitions 0/135 dead transitions. [2024-11-12 16:29:04,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 135 transitions, 1117 flow [2024-11-12 16:29:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:29:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:29:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-11-12 16:29:04,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35584415584415585 [2024-11-12 16:29:04,472 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 499 flow. Second operand 7 states and 137 transitions. [2024-11-12 16:29:04,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 135 transitions, 1117 flow [2024-11-12 16:29:04,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 135 transitions, 1036 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-11-12 16:29:04,485 INFO L231 Difference]: Finished difference. Result has 107 places, 81 transitions, 499 flow [2024-11-12 16:29:04,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=499, PETRI_PLACES=107, PETRI_TRANSITIONS=81} [2024-11-12 16:29:04,485 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-11-12 16:29:04,485 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 81 transitions, 499 flow [2024-11-12 16:29:04,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:04,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:04,486 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:04,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:04,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 16:29:04,686 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:04,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:04,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1700362048, now seen corresponding path program 1 times [2024-11-12 16:29:04,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:04,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730137097] [2024-11-12 16:29:04,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:04,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:04,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:04,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730137097] [2024-11-12 16:29:04,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730137097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:04,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611598408] [2024-11-12 16:29:04,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:04,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:04,928 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:04,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 16:29:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:05,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:29:05,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:29:05,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:05,195 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 22 treesize of output 18 [2024-11-12 16:29:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:29:05,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611598408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:05,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:05,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-12 16:29:05,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644452917] [2024-11-12 16:29:05,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:05,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:29:05,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:29:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:29:05,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-12 16:29:05,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 81 transitions, 499 flow. Second operand has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:05,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:05,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-12 16:29:05,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:06,686 INFO L124 PetriNetUnfolderBase]: 4591/6802 cut-off events. [2024-11-12 16:29:06,686 INFO L125 PetriNetUnfolderBase]: For 16818/17346 co-relation queries the response was YES. [2024-11-12 16:29:06,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24317 conditions, 6802 events. 4591/6802 cut-off events. For 16818/17346 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 37113 event pairs, 1656 based on Foata normal form. 0/6484 useless extension candidates. Maximal degree in co-relation 19625. Up to 2660 conditions per place. [2024-11-12 16:29:06,729 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 130 selfloop transitions, 24 changer transitions 0/159 dead transitions. [2024-11-12 16:29:06,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 159 transitions, 1213 flow [2024-11-12 16:29:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 16:29:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 16:29:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 291 transitions. [2024-11-12 16:29:06,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37792207792207794 [2024-11-12 16:29:06,730 INFO L175 Difference]: Start difference. First operand has 107 places, 81 transitions, 499 flow. Second operand 14 states and 291 transitions. [2024-11-12 16:29:06,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 159 transitions, 1213 flow [2024-11-12 16:29:06,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 159 transitions, 1186 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-12 16:29:06,770 INFO L231 Difference]: Finished difference. Result has 119 places, 83 transitions, 551 flow [2024-11-12 16:29:06,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=551, PETRI_PLACES=119, PETRI_TRANSITIONS=83} [2024-11-12 16:29:06,771 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-11-12 16:29:06,771 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 83 transitions, 551 flow [2024-11-12 16:29:06,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:06,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:06,771 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:06,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-12 16:29:06,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 16:29:06,976 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:06,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash -541835628, now seen corresponding path program 2 times [2024-11-12 16:29:06,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:06,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760101997] [2024-11-12 16:29:06,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:06,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:07,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:07,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760101997] [2024-11-12 16:29:07,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760101997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:07,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304495917] [2024-11-12 16:29:07,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:07,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:07,263 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:07,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 16:29:07,341 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:29:07,341 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:07,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 16:29:07,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:07,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:29:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:29:07,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:29:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304495917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:07,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:07,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-12 16:29:07,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131677871] [2024-11-12 16:29:07,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:07,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:29:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:29:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:29:08,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:29:08,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 83 transitions, 551 flow. Second operand has 18 states, 18 states have (on average 13.5) internal successors, (243), 18 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:08,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:08,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:29:08,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:09,572 INFO L124 PetriNetUnfolderBase]: 6940/9734 cut-off events. [2024-11-12 16:29:09,572 INFO L125 PetriNetUnfolderBase]: For 28166/29118 co-relation queries the response was YES. [2024-11-12 16:29:09,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37061 conditions, 9734 events. 6940/9734 cut-off events. For 28166/29118 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 51358 event pairs, 1517 based on Foata normal form. 578/10285 useless extension candidates. Maximal degree in co-relation 31531. Up to 2424 conditions per place. [2024-11-12 16:29:09,629 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 162 selfloop transitions, 21 changer transitions 0/187 dead transitions. [2024-11-12 16:29:09,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 187 transitions, 1482 flow [2024-11-12 16:29:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:29:09,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:29:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-11-12 16:29:09,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3986013986013986 [2024-11-12 16:29:09,631 INFO L175 Difference]: Start difference. First operand has 119 places, 83 transitions, 551 flow. Second operand 13 states and 285 transitions. [2024-11-12 16:29:09,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 187 transitions, 1482 flow [2024-11-12 16:29:09,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 187 transitions, 1432 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-12 16:29:09,661 INFO L231 Difference]: Finished difference. Result has 122 places, 85 transitions, 582 flow [2024-11-12 16:29:09,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=582, PETRI_PLACES=122, PETRI_TRANSITIONS=85} [2024-11-12 16:29:09,661 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-11-12 16:29:09,662 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 85 transitions, 582 flow [2024-11-12 16:29:09,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 18 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:09,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:09,662 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:09,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:09,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:09,863 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:09,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:09,863 INFO L85 PathProgramCache]: Analyzing trace with hash -541835630, now seen corresponding path program 1 times [2024-11-12 16:29:09,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:09,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559864944] [2024-11-12 16:29:09,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:09,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:10,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:10,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559864944] [2024-11-12 16:29:10,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559864944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:10,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162699785] [2024-11-12 16:29:10,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:10,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:10,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:10,077 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:10,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 16:29:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:10,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-12 16:29:10,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:10,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:29:10,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:10,231 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:10,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:10,253 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 31 treesize of output 24 [2024-11-12 16:29:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:10,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:29:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162699785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:10,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:10,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-12 16:29:10,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749072365] [2024-11-12 16:29:10,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:10,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 16:29:10,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 16:29:10,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-12 16:29:10,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 55 [2024-11-12 16:29:10,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 85 transitions, 582 flow. Second operand has 21 states, 21 states have (on average 10.095238095238095) internal successors, (212), 21 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:10,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:10,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 55 [2024-11-12 16:29:10,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:12,273 INFO L124 PetriNetUnfolderBase]: 5035/7453 cut-off events. [2024-11-12 16:29:12,274 INFO L125 PetriNetUnfolderBase]: For 24656/25334 co-relation queries the response was YES. [2024-11-12 16:29:12,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29698 conditions, 7453 events. 5035/7453 cut-off events. For 24656/25334 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 39920 event pairs, 1720 based on Foata normal form. 436/7850 useless extension candidates. Maximal degree in co-relation 25151. Up to 2841 conditions per place. [2024-11-12 16:29:12,327 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 155 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2024-11-12 16:29:12,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 185 transitions, 1476 flow [2024-11-12 16:29:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-12 16:29:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-12 16:29:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 258 transitions. [2024-11-12 16:29:12,330 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31272727272727274 [2024-11-12 16:29:12,330 INFO L175 Difference]: Start difference. First operand has 122 places, 85 transitions, 582 flow. Second operand 15 states and 258 transitions. [2024-11-12 16:29:12,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 185 transitions, 1476 flow [2024-11-12 16:29:12,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 185 transitions, 1438 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-12 16:29:12,366 INFO L231 Difference]: Finished difference. Result has 130 places, 87 transitions, 621 flow [2024-11-12 16:29:12,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=621, PETRI_PLACES=130, PETRI_TRANSITIONS=87} [2024-11-12 16:29:12,367 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-11-12 16:29:12,367 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 87 transitions, 621 flow [2024-11-12 16:29:12,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.095238095238095) internal successors, (212), 21 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:12,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:12,367 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:12,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:12,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:12,568 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:12,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1134081831, now seen corresponding path program 1 times [2024-11-12 16:29:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:12,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089603871] [2024-11-12 16:29:12,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:12,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:12,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089603871] [2024-11-12 16:29:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089603871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849161665] [2024-11-12 16:29:12,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:12,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:12,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:12,678 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:12,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 16:29:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:12,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:29:12,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:12,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849161665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:12,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-12 16:29:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906537064] [2024-11-12 16:29:12,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:12,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:29:12,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:29:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:29:12,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:29:12,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 87 transitions, 621 flow. Second operand has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:12,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:12,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:29:12,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:13,895 INFO L124 PetriNetUnfolderBase]: 5917/8461 cut-off events. [2024-11-12 16:29:13,895 INFO L125 PetriNetUnfolderBase]: For 39378/40746 co-relation queries the response was YES. [2024-11-12 16:29:13,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35245 conditions, 8461 events. 5917/8461 cut-off events. For 39378/40746 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 42830 event pairs, 4250 based on Foata normal form. 394/8798 useless extension candidates. Maximal degree in co-relation 31810. Up to 7319 conditions per place. [2024-11-12 16:29:13,938 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 87 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-11-12 16:29:13,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 117 transitions, 990 flow [2024-11-12 16:29:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:29:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:29:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-11-12 16:29:13,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-11-12 16:29:13,939 INFO L175 Difference]: Start difference. First operand has 130 places, 87 transitions, 621 flow. Second operand 10 states and 198 transitions. [2024-11-12 16:29:13,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 117 transitions, 990 flow [2024-11-12 16:29:13,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 117 transitions, 947 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-11-12 16:29:13,960 INFO L231 Difference]: Finished difference. Result has 126 places, 85 transitions, 625 flow [2024-11-12 16:29:13,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=625, PETRI_PLACES=126, PETRI_TRANSITIONS=85} [2024-11-12 16:29:13,960 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-11-12 16:29:13,961 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 85 transitions, 625 flow [2024-11-12 16:29:13,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:13,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:13,961 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:13,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-12 16:29:14,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:14,162 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:14,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:14,163 INFO L85 PathProgramCache]: Analyzing trace with hash -640524919, now seen corresponding path program 1 times [2024-11-12 16:29:14,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:14,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888058253] [2024-11-12 16:29:14,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:14,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:14,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888058253] [2024-11-12 16:29:14,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888058253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466711849] [2024-11-12 16:29:14,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:14,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:14,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:14,283 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:14,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 16:29:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:14,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:29:14,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:14,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:14,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466711849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:14,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:14,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-12 16:29:14,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255862212] [2024-11-12 16:29:14,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:14,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:29:14,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:29:14,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:29:14,594 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:29:14,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 85 transitions, 625 flow. Second operand has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:14,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:14,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:29:14,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:15,832 INFO L124 PetriNetUnfolderBase]: 8416/11964 cut-off events. [2024-11-12 16:29:15,832 INFO L125 PetriNetUnfolderBase]: For 51882/53148 co-relation queries the response was YES. [2024-11-12 16:29:15,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51168 conditions, 11964 events. 8416/11964 cut-off events. For 51882/53148 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 62819 event pairs, 4946 based on Foata normal form. 151/12095 useless extension candidates. Maximal degree in co-relation 43079. Up to 7527 conditions per place. [2024-11-12 16:29:15,917 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 142 selfloop transitions, 26 changer transitions 0/173 dead transitions. [2024-11-12 16:29:15,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 173 transitions, 1580 flow [2024-11-12 16:29:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:29:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:29:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-11-12 16:29:15,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-11-12 16:29:15,919 INFO L175 Difference]: Start difference. First operand has 126 places, 85 transitions, 625 flow. Second operand 12 states and 246 transitions. [2024-11-12 16:29:15,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 173 transitions, 1580 flow [2024-11-12 16:29:15,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 173 transitions, 1527 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-12 16:29:15,972 INFO L231 Difference]: Finished difference. Result has 133 places, 89 transitions, 690 flow [2024-11-12 16:29:15,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=690, PETRI_PLACES=133, PETRI_TRANSITIONS=89} [2024-11-12 16:29:15,973 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-11-12 16:29:15,973 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 89 transitions, 690 flow [2024-11-12 16:29:15,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:15,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:15,973 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:15,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:16,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:16,174 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:16,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1337146292, now seen corresponding path program 2 times [2024-11-12 16:29:16,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:16,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194822284] [2024-11-12 16:29:16,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:16,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:16,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:16,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194822284] [2024-11-12 16:29:16,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194822284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:16,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012748814] [2024-11-12 16:29:16,315 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:16,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:16,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:16,317 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:16,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 16:29:16,423 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:29:16,423 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:16,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:29:16,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:16,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:16,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012748814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:16,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:16,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-12 16:29:16,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300297121] [2024-11-12 16:29:16,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:16,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:29:16,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:29:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:29:16,636 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:29:16,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 89 transitions, 690 flow. Second operand has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:16,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:16,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:29:16,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:17,904 INFO L124 PetriNetUnfolderBase]: 8150/11737 cut-off events. [2024-11-12 16:29:17,904 INFO L125 PetriNetUnfolderBase]: For 52439/54011 co-relation queries the response was YES. [2024-11-12 16:29:17,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51675 conditions, 11737 events. 8150/11737 cut-off events. For 52439/54011 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 61332 event pairs, 4817 based on Foata normal form. 752/12439 useless extension candidates. Maximal degree in co-relation 43067. Up to 7692 conditions per place. [2024-11-12 16:29:17,998 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 151 selfloop transitions, 29 changer transitions 0/184 dead transitions. [2024-11-12 16:29:17,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 184 transitions, 1689 flow [2024-11-12 16:29:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:29:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:29:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-11-12 16:29:18,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-11-12 16:29:18,000 INFO L175 Difference]: Start difference. First operand has 133 places, 89 transitions, 690 flow. Second operand 13 states and 275 transitions. [2024-11-12 16:29:18,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 184 transitions, 1689 flow [2024-11-12 16:29:18,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 184 transitions, 1644 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-12 16:29:18,055 INFO L231 Difference]: Finished difference. Result has 141 places, 94 transitions, 795 flow [2024-11-12 16:29:18,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=795, PETRI_PLACES=141, PETRI_TRANSITIONS=94} [2024-11-12 16:29:18,056 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-11-12 16:29:18,056 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 94 transitions, 795 flow [2024-11-12 16:29:18,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:18,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:18,056 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:18,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:18,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:18,257 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:18,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1040932730, now seen corresponding path program 1 times [2024-11-12 16:29:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:18,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104254545] [2024-11-12 16:29:18,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:18,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:18,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104254545] [2024-11-12 16:29:18,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104254545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784730023] [2024-11-12 16:29:18,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:18,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:18,507 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:18,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 16:29:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:18,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-12 16:29:18,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:18,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:29:18,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:18,746 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:29:18,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-12 16:29:18,758 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:18,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:19,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:19,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784730023] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:19,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:19,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2024-11-12 16:29:19,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375382996] [2024-11-12 16:29:19,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:19,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 16:29:19,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 16:29:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2024-11-12 16:29:20,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 55 [2024-11-12 16:29:20,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 94 transitions, 795 flow. Second operand has 30 states, 30 states have (on average 9.133333333333333) internal successors, (274), 30 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:20,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:20,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 55 [2024-11-12 16:29:20,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:23,383 INFO L124 PetriNetUnfolderBase]: 9729/13723 cut-off events. [2024-11-12 16:29:23,383 INFO L125 PetriNetUnfolderBase]: For 93235/96658 co-relation queries the response was YES. [2024-11-12 16:29:23,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65741 conditions, 13723 events. 9729/13723 cut-off events. For 93235/96658 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 73983 event pairs, 1976 based on Foata normal form. 1263/14969 useless extension candidates. Maximal degree in co-relation 62538. Up to 2946 conditions per place. [2024-11-12 16:29:23,500 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 305 selfloop transitions, 44 changer transitions 0/355 dead transitions. [2024-11-12 16:29:23,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 355 transitions, 3806 flow [2024-11-12 16:29:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-12 16:29:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-12 16:29:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 456 transitions. [2024-11-12 16:29:23,502 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26744868035190617 [2024-11-12 16:29:23,502 INFO L175 Difference]: Start difference. First operand has 141 places, 94 transitions, 795 flow. Second operand 31 states and 456 transitions. [2024-11-12 16:29:23,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 355 transitions, 3806 flow [2024-11-12 16:29:23,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 355 transitions, 3680 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-11-12 16:29:23,620 INFO L231 Difference]: Finished difference. Result has 160 places, 111 transitions, 952 flow [2024-11-12 16:29:23,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=952, PETRI_PLACES=160, PETRI_TRANSITIONS=111} [2024-11-12 16:29:23,621 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 104 predicate places. [2024-11-12 16:29:23,621 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 111 transitions, 952 flow [2024-11-12 16:29:23,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.133333333333333) internal successors, (274), 30 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:23,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:23,621 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:23,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:23,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:23,822 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:23,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1040932732, now seen corresponding path program 2 times [2024-11-12 16:29:23,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:23,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463334936] [2024-11-12 16:29:23,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:23,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:29:24,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463334936] [2024-11-12 16:29:24,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463334936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153481145] [2024-11-12 16:29:24,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:24,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:24,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:24,034 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:24,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 16:29:24,132 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:29:24,132 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:24,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 16:29:24,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:24,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:29:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:29:24,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:29:24,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153481145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:24,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:24,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2024-11-12 16:29:24,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888508017] [2024-11-12 16:29:24,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:24,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 16:29:24,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 16:29:24,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-11-12 16:29:24,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:29:24,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 111 transitions, 952 flow. Second operand has 16 states, 16 states have (on average 14.4375) internal successors, (231), 16 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:24,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:24,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:29:24,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:26,417 INFO L124 PetriNetUnfolderBase]: 8828/12527 cut-off events. [2024-11-12 16:29:26,417 INFO L125 PetriNetUnfolderBase]: For 79915/82839 co-relation queries the response was YES. [2024-11-12 16:29:26,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60898 conditions, 12527 events. 8828/12527 cut-off events. For 79915/82839 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 67574 event pairs, 1976 based on Foata normal form. 1135/13659 useless extension candidates. Maximal degree in co-relation 55537. Up to 3999 conditions per place. [2024-11-12 16:29:26,495 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 227 selfloop transitions, 26 changer transitions 0/259 dead transitions. [2024-11-12 16:29:26,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 259 transitions, 2890 flow [2024-11-12 16:29:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:29:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:29:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-11-12 16:29:26,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-11-12 16:29:26,496 INFO L175 Difference]: Start difference. First operand has 160 places, 111 transitions, 952 flow. Second operand 8 states and 182 transitions. [2024-11-12 16:29:26,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 259 transitions, 2890 flow [2024-11-12 16:29:26,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 259 transitions, 2814 flow, removed 11 selfloop flow, removed 18 redundant places. [2024-11-12 16:29:26,585 INFO L231 Difference]: Finished difference. Result has 148 places, 110 transitions, 921 flow [2024-11-12 16:29:26,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=921, PETRI_PLACES=148, PETRI_TRANSITIONS=110} [2024-11-12 16:29:26,585 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-11-12 16:29:26,585 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 110 transitions, 921 flow [2024-11-12 16:29:26,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.4375) internal successors, (231), 16 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:26,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:26,586 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:26,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:26,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-12 16:29:26,786 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:26,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash 480307372, now seen corresponding path program 2 times [2024-11-12 16:29:26,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:26,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43700500] [2024-11-12 16:29:26,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:26,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-12 16:29:27,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:27,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43700500] [2024-11-12 16:29:27,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43700500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:27,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242150289] [2024-11-12 16:29:27,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:27,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:27,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:27,039 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:27,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-12 16:29:27,146 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:29:27,147 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:27,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 16:29:27,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:27,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:27,255 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:29:27,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-12 16:29:27,266 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:27,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:29:27,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:27,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-12 16:29:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:29:27,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242150289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:27,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:27,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2024-11-12 16:29:27,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648325395] [2024-11-12 16:29:27,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:27,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 16:29:27,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:27,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 16:29:27,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-12 16:29:28,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-12 16:29:28,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 110 transitions, 921 flow. Second operand has 25 states, 25 states have (on average 11.36) internal successors, (284), 25 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:28,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:28,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-12 16:29:28,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:30,447 INFO L124 PetriNetUnfolderBase]: 8187/11686 cut-off events. [2024-11-12 16:29:30,447 INFO L125 PetriNetUnfolderBase]: For 74891/76269 co-relation queries the response was YES. [2024-11-12 16:29:30,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57896 conditions, 11686 events. 8187/11686 cut-off events. For 74891/76269 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 62253 event pairs, 1490 based on Foata normal form. 264/11926 useless extension candidates. Maximal degree in co-relation 45511. Up to 2556 conditions per place. [2024-11-12 16:29:30,530 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 245 selfloop transitions, 39 changer transitions 0/293 dead transitions. [2024-11-12 16:29:30,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 293 transitions, 2923 flow [2024-11-12 16:29:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-12 16:29:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-12 16:29:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 422 transitions. [2024-11-12 16:29:30,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3069090909090909 [2024-11-12 16:29:30,532 INFO L175 Difference]: Start difference. First operand has 148 places, 110 transitions, 921 flow. Second operand 25 states and 422 transitions. [2024-11-12 16:29:30,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 293 transitions, 2923 flow [2024-11-12 16:29:30,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 293 transitions, 2737 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-11-12 16:29:30,629 INFO L231 Difference]: Finished difference. Result has 164 places, 115 transitions, 990 flow [2024-11-12 16:29:30,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=990, PETRI_PLACES=164, PETRI_TRANSITIONS=115} [2024-11-12 16:29:30,630 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-11-12 16:29:30,630 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 115 transitions, 990 flow [2024-11-12 16:29:30,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.36) internal successors, (284), 25 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:30,630 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:30,630 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:30,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:30,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-12 16:29:30,831 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:30,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1805232382, now seen corresponding path program 1 times [2024-11-12 16:29:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:30,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654760386] [2024-11-12 16:29:30,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:30,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654760386] [2024-11-12 16:29:30,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654760386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:30,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:30,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43690980] [2024-11-12 16:29:30,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:30,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:30,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:30,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:30,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-12 16:29:30,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 115 transitions, 990 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:30,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:30,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-12 16:29:30,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:31,734 INFO L124 PetriNetUnfolderBase]: 6761/10155 cut-off events. [2024-11-12 16:29:31,735 INFO L125 PetriNetUnfolderBase]: For 66075/67253 co-relation queries the response was YES. [2024-11-12 16:29:31,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48120 conditions, 10155 events. 6761/10155 cut-off events. For 66075/67253 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 56227 event pairs, 1895 based on Foata normal form. 1/10134 useless extension candidates. Maximal degree in co-relation 38262. Up to 8847 conditions per place. [2024-11-12 16:29:31,808 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 127 selfloop transitions, 5 changer transitions 1/145 dead transitions. [2024-11-12 16:29:31,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 145 transitions, 1497 flow [2024-11-12 16:29:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-12 16:29:31,809 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-11-12 16:29:31,809 INFO L175 Difference]: Start difference. First operand has 164 places, 115 transitions, 990 flow. Second operand 3 states and 85 transitions. [2024-11-12 16:29:31,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 145 transitions, 1497 flow [2024-11-12 16:29:31,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 145 transitions, 1429 flow, removed 4 selfloop flow, removed 17 redundant places. [2024-11-12 16:29:31,866 INFO L231 Difference]: Finished difference. Result has 150 places, 119 transitions, 978 flow [2024-11-12 16:29:31,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=978, PETRI_PLACES=150, PETRI_TRANSITIONS=119} [2024-11-12 16:29:31,867 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-11-12 16:29:31,867 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 119 transitions, 978 flow [2024-11-12 16:29:31,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:31,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:31,867 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:31,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-12 16:29:31,867 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:31,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash -951083639, now seen corresponding path program 3 times [2024-11-12 16:29:31,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:31,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346755464] [2024-11-12 16:29:31,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:31,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:29:32,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:32,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346755464] [2024-11-12 16:29:32,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346755464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:32,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543135837] [2024-11-12 16:29:32,149 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:29:32,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:32,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:32,151 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:32,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-12 16:29:32,253 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:29:32,253 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:32,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 16:29:32,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:32,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:32,322 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:32,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:32,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:29:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-12 16:29:32,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:32,635 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 42 treesize of output 38 [2024-11-12 16:29:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-12 16:29:32,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543135837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:32,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:32,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-12 16:29:32,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430369945] [2024-11-12 16:29:32,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:32,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-12 16:29:32,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:32,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-12 16:29:32,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-11-12 16:29:32,999 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-12 16:29:33,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 119 transitions, 978 flow. Second operand has 23 states, 23 states have (on average 11.391304347826088) internal successors, (262), 23 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:33,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:33,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-12 16:29:33,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:35,601 INFO L124 PetriNetUnfolderBase]: 9528/13630 cut-off events. [2024-11-12 16:29:35,601 INFO L125 PetriNetUnfolderBase]: For 71277/72190 co-relation queries the response was YES. [2024-11-12 16:29:35,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64630 conditions, 13630 events. 9528/13630 cut-off events. For 71277/72190 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 72657 event pairs, 1854 based on Foata normal form. 288/13908 useless extension candidates. Maximal degree in co-relation 49407. Up to 2356 conditions per place. [2024-11-12 16:29:35,731 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 281 selfloop transitions, 46 changer transitions 0/336 dead transitions. [2024-11-12 16:29:35,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 336 transitions, 3136 flow [2024-11-12 16:29:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 16:29:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-12 16:29:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 408 transitions. [2024-11-12 16:29:35,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32252964426877473 [2024-11-12 16:29:35,732 INFO L175 Difference]: Start difference. First operand has 150 places, 119 transitions, 978 flow. Second operand 23 states and 408 transitions. [2024-11-12 16:29:35,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 336 transitions, 3136 flow [2024-11-12 16:29:35,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 336 transitions, 3117 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:35,847 INFO L231 Difference]: Finished difference. Result has 173 places, 129 transitions, 1211 flow [2024-11-12 16:29:35,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1211, PETRI_PLACES=173, PETRI_TRANSITIONS=129} [2024-11-12 16:29:35,847 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 117 predicate places. [2024-11-12 16:29:35,848 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 129 transitions, 1211 flow [2024-11-12 16:29:35,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.391304347826088) internal successors, (262), 23 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:35,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:35,848 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:35,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:36,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-12 16:29:36,049 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:36,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:36,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1993093411, now seen corresponding path program 1 times [2024-11-12 16:29:36,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:36,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993947472] [2024-11-12 16:29:36,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:29:36,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:36,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993947472] [2024-11-12 16:29:36,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993947472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:36,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077109116] [2024-11-12 16:29:36,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:36,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:36,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:36,210 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:36,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-12 16:29:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:36,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:29:36,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:29:36,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:29:36,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077109116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:36,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:36,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-11-12 16:29:36,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463633543] [2024-11-12 16:29:36,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:36,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-12 16:29:36,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:36,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-12 16:29:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-12 16:29:36,737 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:29:36,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 129 transitions, 1211 flow. Second operand has 24 states, 24 states have (on average 13.291666666666666) internal successors, (319), 24 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:36,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:36,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:29:36,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:38,962 INFO L124 PetriNetUnfolderBase]: 12828/18492 cut-off events. [2024-11-12 16:29:38,962 INFO L125 PetriNetUnfolderBase]: For 140528/142557 co-relation queries the response was YES. [2024-11-12 16:29:39,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92335 conditions, 18492 events. 12828/18492 cut-off events. For 140528/142557 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 103261 event pairs, 5367 based on Foata normal form. 0/18328 useless extension candidates. Maximal degree in co-relation 71004. Up to 6997 conditions per place. [2024-11-12 16:29:39,086 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 232 selfloop transitions, 55 changer transitions 0/298 dead transitions. [2024-11-12 16:29:39,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 298 transitions, 3386 flow [2024-11-12 16:29:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 16:29:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-12 16:29:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 329 transitions. [2024-11-12 16:29:39,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3323232323232323 [2024-11-12 16:29:39,087 INFO L175 Difference]: Start difference. First operand has 173 places, 129 transitions, 1211 flow. Second operand 18 states and 329 transitions. [2024-11-12 16:29:39,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 298 transitions, 3386 flow [2024-11-12 16:29:39,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 298 transitions, 3247 flow, removed 30 selfloop flow, removed 13 redundant places. [2024-11-12 16:29:39,490 INFO L231 Difference]: Finished difference. Result has 183 places, 149 transitions, 1548 flow [2024-11-12 16:29:39,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1548, PETRI_PLACES=183, PETRI_TRANSITIONS=149} [2024-11-12 16:29:39,490 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 127 predicate places. [2024-11-12 16:29:39,490 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 149 transitions, 1548 flow [2024-11-12 16:29:39,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.291666666666666) internal successors, (319), 24 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:39,491 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:39,491 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:39,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-12 16:29:39,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:39,691 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:39,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 797500532, now seen corresponding path program 1 times [2024-11-12 16:29:39,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:39,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151519880] [2024-11-12 16:29:39,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:39,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:39,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:39,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151519880] [2024-11-12 16:29:39,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151519880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:39,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784201131] [2024-11-12 16:29:39,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:39,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:39,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:39,764 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:39,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-12 16:29:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:39,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:29:39,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:39,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:39,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784201131] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:39,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:29:39,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-12 16:29:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342998431] [2024-11-12 16:29:39,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:39,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:29:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:39,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:29:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-12 16:29:39,920 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:29:39,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 149 transitions, 1548 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:39,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:39,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:29:39,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:42,257 INFO L124 PetriNetUnfolderBase]: 13558/19495 cut-off events. [2024-11-12 16:29:42,257 INFO L125 PetriNetUnfolderBase]: For 150205/151349 co-relation queries the response was YES. [2024-11-12 16:29:42,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100066 conditions, 19495 events. 13558/19495 cut-off events. For 150205/151349 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 107987 event pairs, 3987 based on Foata normal form. 44/19502 useless extension candidates. Maximal degree in co-relation 85886. Up to 10870 conditions per place. [2024-11-12 16:29:42,538 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 170 selfloop transitions, 19 changer transitions 0/198 dead transitions. [2024-11-12 16:29:42,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 198 transitions, 2388 flow [2024-11-12 16:29:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:29:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:29:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-12 16:29:42,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37454545454545457 [2024-11-12 16:29:42,539 INFO L175 Difference]: Start difference. First operand has 183 places, 149 transitions, 1548 flow. Second operand 5 states and 103 transitions. [2024-11-12 16:29:42,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 198 transitions, 2388 flow [2024-11-12 16:29:42,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 198 transitions, 2372 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-11-12 16:29:42,771 INFO L231 Difference]: Finished difference. Result has 187 places, 149 transitions, 1595 flow [2024-11-12 16:29:42,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1595, PETRI_PLACES=187, PETRI_TRANSITIONS=149} [2024-11-12 16:29:42,772 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 131 predicate places. [2024-11-12 16:29:42,772 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 149 transitions, 1595 flow [2024-11-12 16:29:42,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:42,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:42,772 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:42,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-12 16:29:42,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:42,973 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:42,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:42,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1645036696, now seen corresponding path program 1 times [2024-11-12 16:29:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270822933] [2024-11-12 16:29:42,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:29:43,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:43,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270822933] [2024-11-12 16:29:43,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270822933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:43,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:43,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:29:43,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564087161] [2024-11-12 16:29:43,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:43,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:43,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:43,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:43,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-12 16:29:43,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 149 transitions, 1595 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:43,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:43,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-12 16:29:43,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:45,578 INFO L124 PetriNetUnfolderBase]: 12294/17812 cut-off events. [2024-11-12 16:29:45,578 INFO L125 PetriNetUnfolderBase]: For 193171/195637 co-relation queries the response was YES. [2024-11-12 16:29:45,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96677 conditions, 17812 events. 12294/17812 cut-off events. For 193171/195637 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 101105 event pairs, 3553 based on Foata normal form. 506/17797 useless extension candidates. Maximal degree in co-relation 83238. Up to 9508 conditions per place. [2024-11-12 16:29:45,907 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 175 selfloop transitions, 20 changer transitions 0/205 dead transitions. [2024-11-12 16:29:45,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 205 transitions, 2737 flow [2024-11-12 16:29:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-11-12 16:29:45,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-11-12 16:29:45,908 INFO L175 Difference]: Start difference. First operand has 187 places, 149 transitions, 1595 flow. Second operand 4 states and 89 transitions. [2024-11-12 16:29:45,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 205 transitions, 2737 flow [2024-11-12 16:29:46,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 205 transitions, 2697 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-12 16:29:46,103 INFO L231 Difference]: Finished difference. Result has 184 places, 146 transitions, 1588 flow [2024-11-12 16:29:46,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1588, PETRI_PLACES=184, PETRI_TRANSITIONS=146} [2024-11-12 16:29:46,104 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2024-11-12 16:29:46,104 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 146 transitions, 1588 flow [2024-11-12 16:29:46,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:46,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:46,104 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:46,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-12 16:29:46,104 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-12 16:29:46,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash 56640068, now seen corresponding path program 1 times [2024-11-12 16:29:46,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:46,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387121679] [2024-11-12 16:29:46,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:46,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:46,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:46,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387121679] [2024-11-12 16:29:46,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387121679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:46,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773668213] [2024-11-12 16:29:46,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:46,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:46,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:46,920 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-12 16:29:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:47,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-12 16:29:47,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:47,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:29:47,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-12 16:29:47,102 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:29:47,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:29:47,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 16:29:47,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-12 16:29:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:47,412 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:55,872 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-12 16:29:55,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1610 treesize of output 1180 [2024-11-12 16:29:55,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:55,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 642 treesize of output 600