./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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-min-array-hom.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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:20:23,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:20:23,501 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:20:23,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:20:23,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:20:23,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:20:23,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:20:23,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:20:23,541 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:20:23,542 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:20:23,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:20:23,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:20:23,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:20:23,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:20:23,547 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:20:23,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:20:23,548 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:20:23,548 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:20:23,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:20:23,551 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:20:23,551 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:20:23,552 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:20:23,552 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:20:23,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:20:23,553 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:20:23,553 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:20:23,554 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:20:23,554 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:20:23,554 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:20:23,554 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:20:23,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:20:23,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:20:23,556 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:20:23,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:20:23,556 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:20:23,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:20:23,557 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:20:23,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:20:23,558 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:20:23,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:20:23,558 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:20:23,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:20:23,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2024-11-10 18:20:23,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:20:23,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:20:23,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:20:23,903 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:20:23,904 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:20:23,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-11-10 18:20:25,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:20:25,855 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:20:25,857 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-11-10 18:20:25,868 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872e18baa/a4cb26c48e5e4b85a677d499970567a5/FLAG912989c95 [2024-11-10 18:20:26,235 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872e18baa/a4cb26c48e5e4b85a677d499970567a5 [2024-11-10 18:20:26,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:20:26,239 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:20:26,240 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:20:26,240 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:20:26,247 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:20:26,248 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577e769f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26, skipping insertion in model container [2024-11-10 18:20:26,249 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,274 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:20:26,532 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:20:26,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:20:26,549 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:20:26,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:20:26,587 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:20:26,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26 WrapperNode [2024-11-10 18:20:26,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:20:26,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:20:26,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:20:26,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:20:26,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,623 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 88 [2024-11-10 18:20:26,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:20:26,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:20:26,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:20:26,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:20:26,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,636 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,650 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-10 18:20:26,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,657 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,662 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:20:26,663 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:20:26,663 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:20:26,664 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:20:26,664 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (1/1) ... [2024-11-10 18:20:26,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:20:26,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:26,703 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) [2024-11-10 18:20:26,711 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 [2024-11-10 18:20:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:20:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:20:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:20:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:20:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:20:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:20:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:20:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:20:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:20:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:20:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:20:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:20:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:20:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:20:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:20:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:20:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:20:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:20:26,762 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:20:26,871 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:20:26,873 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:20:27,139 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:20:27,143 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:20:27,372 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:20:27,372 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:20:27,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:20:27 BoogieIcfgContainer [2024-11-10 18:20:27,373 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:20:27,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:20:27,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:20:27,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:20:27,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:20:26" (1/3) ... [2024-11-10 18:20:27,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed830d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:20:27, skipping insertion in model container [2024-11-10 18:20:27,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:26" (2/3) ... [2024-11-10 18:20:27,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed830d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:20:27, skipping insertion in model container [2024-11-10 18:20:27,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:20:27" (3/3) ... [2024-11-10 18:20:27,380 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2024-11-10 18:20:27,401 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:20:27,401 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-10 18:20:27,401 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:20:27,467 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:20:27,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 145 flow [2024-11-10 18:20:27,527 INFO L124 PetriNetUnfolderBase]: 8/59 cut-off events. [2024-11-10 18:20:27,527 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:20:27,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 59 events. 8/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 138 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-11-10 18:20:27,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 62 transitions, 145 flow [2024-11-10 18:20:27,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 58 transitions, 134 flow [2024-11-10 18:20:27,543 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:20:27,552 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;@3d8b1a3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:20:27,552 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-10 18:20:27,556 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:20:27,557 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:20:27,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:20:27,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:27,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:20:27,559 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:27,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash 13385331, now seen corresponding path program 1 times [2024-11-10 18:20:27,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:27,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122046928] [2024-11-10 18:20:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:27,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:27,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122046928] [2024-11-10 18:20:27,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122046928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:27,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:27,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:20:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485818475] [2024-11-10 18:20:27,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:27,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:27,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:27,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:27,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-11-10 18:20:27,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:27,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:27,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:28,261 INFO L124 PetriNetUnfolderBase]: 1316/2123 cut-off events. [2024-11-10 18:20:28,262 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-11-10 18:20:28,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 2123 events. 1316/2123 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 13131 event pairs, 1060 based on Foata normal form. 257/1748 useless extension candidates. Maximal degree in co-relation 3828. Up to 1877 conditions per place. [2024-11-10 18:20:28,287 INFO L140 encePairwiseOnDemand]: 48/62 looper letters, 30 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-10 18:20:28,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 172 flow [2024-11-10 18:20:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-10 18:20:28,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2024-11-10 18:20:28,302 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 134 flow. Second operand 3 states and 95 transitions. [2024-11-10 18:20:28,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 172 flow [2024-11-10 18:20:28,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 160 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:20:28,312 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 100 flow [2024-11-10 18:20:28,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-10 18:20:28,320 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -13 predicate places. [2024-11-10 18:20:28,320 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 100 flow [2024-11-10 18:20:28,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-11-10 18:20:28,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:28,321 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:20:28,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:20:28,321 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:28,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash 13385332, now seen corresponding path program 1 times [2024-11-10 18:20:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:28,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98657331] [2024-11-10 18:20:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:28,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:28,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98657331] [2024-11-10 18:20:28,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98657331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:28,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:28,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:28,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469179661] [2024-11-10 18:20:28,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:28,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:28,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:28,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-11-10 18:20:28,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:28,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:28,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:28,938 INFO L124 PetriNetUnfolderBase]: 1316/2122 cut-off events. [2024-11-10 18:20:28,939 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-10 18:20:28,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4049 conditions, 2122 events. 1316/2122 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 13126 event pairs, 1060 based on Foata normal form. 0/1490 useless extension candidates. Maximal degree in co-relation 4034. Up to 1877 conditions per place. [2024-11-10 18:20:28,952 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 28 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-10 18:20:28,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 162 flow [2024-11-10 18:20:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-10 18:20:28,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-11-10 18:20:28,955 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-11-10 18:20:28,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 162 flow [2024-11-10 18:20:28,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:28,957 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 102 flow [2024-11-10 18:20:28,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-11-10 18:20:28,959 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -13 predicate places. [2024-11-10 18:20:28,959 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 102 flow [2024-11-10 18:20:28,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-11-10 18:20:28,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:28,960 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:28,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:20:28,962 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:28,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash -863432802, now seen corresponding path program 1 times [2024-11-10 18:20:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:28,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715668450] [2024-11-10 18:20:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:28,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:29,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:29,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715668450] [2024-11-10 18:20:29,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715668450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:29,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:29,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:29,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847428936] [2024-11-10 18:20:29,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:29,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:29,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:29,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:29,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:29,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-11-10 18:20:29,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:29,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:29,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:29,282 INFO L124 PetriNetUnfolderBase]: 792/1311 cut-off events. [2024-11-10 18:20:29,282 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-10 18:20:29,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 1311 events. 792/1311 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7428 event pairs, 608 based on Foata normal form. 0/1035 useless extension candidates. Maximal degree in co-relation 2469. Up to 1134 conditions per place. [2024-11-10 18:20:29,289 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 27 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-10 18:20:29,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 154 flow [2024-11-10 18:20:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-10 18:20:29,291 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-11-10 18:20:29,291 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 102 flow. Second operand 4 states and 100 transitions. [2024-11-10 18:20:29,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 154 flow [2024-11-10 18:20:29,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:29,293 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 92 flow [2024-11-10 18:20:29,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-11-10 18:20:29,294 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -16 predicate places. [2024-11-10 18:20:29,294 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 92 flow [2024-11-10 18:20:29,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-11-10 18:20:29,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:29,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:29,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 18:20:29,295 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:29,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:29,295 INFO L85 PathProgramCache]: Analyzing trace with hash -863432801, now seen corresponding path program 1 times [2024-11-10 18:20:29,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:29,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693635535] [2024-11-10 18:20:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:29,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:29,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693635535] [2024-11-10 18:20:29,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693635535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:29,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:29,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:20:29,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454379026] [2024-11-10 18:20:29,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:29,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:29,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:29,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:29,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2024-11-10 18:20:29,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:29,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:29,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:29,500 INFO L124 PetriNetUnfolderBase]: 792/1315 cut-off events. [2024-11-10 18:20:29,500 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-10 18:20:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 1315 events. 792/1315 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7462 event pairs, 608 based on Foata normal form. 1/1038 useless extension candidates. Maximal degree in co-relation 2469. Up to 1139 conditions per place. [2024-11-10 18:20:29,508 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 30 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2024-11-10 18:20:29,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 164 flow [2024-11-10 18:20:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-10 18:20:29,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-11-10 18:20:29,510 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 92 flow. Second operand 4 states and 102 transitions. [2024-11-10 18:20:29,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 164 flow [2024-11-10 18:20:29,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:29,513 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 103 flow [2024-11-10 18:20:29,514 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-10 18:20:29,514 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -13 predicate places. [2024-11-10 18:20:29,515 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 103 flow [2024-11-10 18:20:29,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2024-11-10 18:20:29,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:29,515 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:29,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:20:29,515 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:29,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2125237343, now seen corresponding path program 1 times [2024-11-10 18:20:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231771815] [2024-11-10 18:20:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:29,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:29,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231771815] [2024-11-10 18:20:29,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231771815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:29,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377313710] [2024-11-10 18:20:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:29,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:29,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:29,701 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) [2024-11-10 18:20:29,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:20:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:29,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:20:29,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:29,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:29,981 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 [2024-11-10 18:20:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:30,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377313710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:30,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:30,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-10 18:20:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415044776] [2024-11-10 18:20:30,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:30,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 18:20:30,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 18:20:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:20:30,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-10 18:20:30,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 103 flow. Second operand has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 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) [2024-11-10 18:20:30,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:30,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-10 18:20:30,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:30,481 INFO L124 PetriNetUnfolderBase]: 1148/1947 cut-off events. [2024-11-10 18:20:30,482 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-10 18:20:30,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3621 conditions, 1947 events. 1148/1947 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11745 event pairs, 483 based on Foata normal form. 0/1578 useless extension candidates. Maximal degree in co-relation 3606. Up to 987 conditions per place. [2024-11-10 18:20:30,497 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 56 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-11-10 18:20:30,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 303 flow [2024-11-10 18:20:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:20:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:20:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-11-10 18:20:30,500 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4400921658986175 [2024-11-10 18:20:30,500 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 103 flow. Second operand 7 states and 191 transitions. [2024-11-10 18:20:30,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 303 flow [2024-11-10 18:20:30,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 299 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:30,503 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 136 flow [2024-11-10 18:20:30,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-10 18:20:30,504 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-10 18:20:30,504 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 136 flow [2024-11-10 18:20:30,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 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) [2024-11-10 18:20:30,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:30,504 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:30,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:20:30,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:30,706 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:30,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1536461858, now seen corresponding path program 1 times [2024-11-10 18:20:30,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:30,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072740041] [2024-11-10 18:20:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:30,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:30,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072740041] [2024-11-10 18:20:30,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072740041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:30,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052393637] [2024-11-10 18:20:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:30,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:30,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:30,793 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) [2024-11-10 18:20:30,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:20:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:30,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:20:30,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:30,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:30,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052393637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:30,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:30,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:20:30,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154591808] [2024-11-10 18:20:30,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:30,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:20:30,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:20:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:20:31,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:31,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 136 flow. Second operand has 14 states, 14 states have (on average 16.928571428571427) internal successors, (237), 14 states have internal predecessors, (237), 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) [2024-11-10 18:20:31,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:31,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:31,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:31,538 INFO L124 PetriNetUnfolderBase]: 2431/3863 cut-off events. [2024-11-10 18:20:31,538 INFO L125 PetriNetUnfolderBase]: For 2094/2094 co-relation queries the response was YES. [2024-11-10 18:20:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9068 conditions, 3863 events. 2431/3863 cut-off events. For 2094/2094 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23477 event pairs, 1341 based on Foata normal form. 0/3272 useless extension candidates. Maximal degree in co-relation 5796. Up to 1932 conditions per place. [2024-11-10 18:20:31,568 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 90 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2024-11-10 18:20:31,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 110 transitions, 558 flow [2024-11-10 18:20:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:20:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:20:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-10 18:20:31,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-11-10 18:20:31,571 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 136 flow. Second operand 9 states and 225 transitions. [2024-11-10 18:20:31,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 110 transitions, 558 flow [2024-11-10 18:20:31,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 552 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:31,575 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 202 flow [2024-11-10 18:20:31,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-11-10 18:20:31,576 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-10 18:20:31,576 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 202 flow [2024-11-10 18:20:31,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.928571428571427) internal successors, (237), 14 states have internal predecessors, (237), 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) [2024-11-10 18:20:31,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:31,577 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:31,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:20:31,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-10 18:20:31,782 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:31,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:31,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1648992361, now seen corresponding path program 1 times [2024-11-10 18:20:31,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:31,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784276514] [2024-11-10 18:20:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:31,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:32,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:32,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784276514] [2024-11-10 18:20:32,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784276514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:32,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989174847] [2024-11-10 18:20:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:32,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:32,027 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) [2024-11-10 18:20:32,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:20:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:32,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-10 18:20:32,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:32,257 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:20:32,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989174847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:32,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:20:32,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-10 18:20:32,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910726716] [2024-11-10 18:20:32,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:32,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:20:32,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:32,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:20:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:20:32,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:32,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-11-10 18:20:32,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:32,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:32,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:32,820 INFO L124 PetriNetUnfolderBase]: 2476/4379 cut-off events. [2024-11-10 18:20:32,821 INFO L125 PetriNetUnfolderBase]: For 2883/2883 co-relation queries the response was YES. [2024-11-10 18:20:32,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10525 conditions, 4379 events. 2476/4379 cut-off events. For 2883/2883 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 30513 event pairs, 1344 based on Foata normal form. 0/3814 useless extension candidates. Maximal degree in co-relation 6541. Up to 2633 conditions per place. [2024-11-10 18:20:32,851 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 55 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-11-10 18:20:32,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 405 flow [2024-11-10 18:20:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-10 18:20:32,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-11-10 18:20:32,853 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 202 flow. Second operand 5 states and 132 transitions. [2024-11-10 18:20:32,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 405 flow [2024-11-10 18:20:32,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 397 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:20:32,859 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 219 flow [2024-11-10 18:20:32,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-11-10 18:20:32,859 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2024-11-10 18:20:32,860 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 219 flow [2024-11-10 18:20:32,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-11-10 18:20:32,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:32,860 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:32,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:20:33,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:33,061 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:33,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:33,061 INFO L85 PathProgramCache]: Analyzing trace with hash 62126011, now seen corresponding path program 1 times [2024-11-10 18:20:33,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:33,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119373893] [2024-11-10 18:20:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:33,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:33,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:33,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119373893] [2024-11-10 18:20:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119373893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:33,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706547756] [2024-11-10 18:20:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:33,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:33,134 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) [2024-11-10 18:20:33,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:20:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:33,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:20:33,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:33,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:33,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706547756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:33,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:33,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:20:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467247255] [2024-11-10 18:20:33,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:33,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:20:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:20:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:20:33,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:33,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 219 flow. Second operand has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 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) [2024-11-10 18:20:33,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:33,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:33,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:34,076 INFO L124 PetriNetUnfolderBase]: 3363/5453 cut-off events. [2024-11-10 18:20:34,077 INFO L125 PetriNetUnfolderBase]: For 3682/3682 co-relation queries the response was YES. [2024-11-10 18:20:34,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13999 conditions, 5453 events. 3363/5453 cut-off events. For 3682/3682 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35627 event pairs, 1705 based on Foata normal form. 0/4775 useless extension candidates. Maximal degree in co-relation 9677. Up to 2816 conditions per place. [2024-11-10 18:20:34,117 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 114 selfloop transitions, 15 changer transitions 0/139 dead transitions. [2024-11-10 18:20:34,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 139 transitions, 783 flow [2024-11-10 18:20:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 18:20:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 18:20:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2024-11-10 18:20:34,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-11-10 18:20:34,120 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 219 flow. Second operand 11 states and 280 transitions. [2024-11-10 18:20:34,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 139 transitions, 783 flow [2024-11-10 18:20:34,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 759 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:34,128 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 283 flow [2024-11-10 18:20:34,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=283, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2024-11-10 18:20:34,129 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-11-10 18:20:34,130 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 283 flow [2024-11-10 18:20:34,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 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) [2024-11-10 18:20:34,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:34,130 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:34,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:34,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:34,335 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:34,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1742800738, now seen corresponding path program 2 times [2024-11-10 18:20:34,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:34,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057667910] [2024-11-10 18:20:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:34,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057667910] [2024-11-10 18:20:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057667910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851548696] [2024-11-10 18:20:34,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:34,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:34,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:34,516 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) [2024-11-10 18:20:34,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:20:34,575 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:20:34,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:34,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 18:20:34,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:34,592 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 [2024-11-10 18:20:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:34,805 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:20:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851548696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:34,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:20:34,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-11-10 18:20:34,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750452523] [2024-11-10 18:20:34,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:34,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:20:34,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:20:34,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:20:34,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-10 18:20:34,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-11-10 18:20:34,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:34,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-10 18:20:34,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:35,318 INFO L124 PetriNetUnfolderBase]: 2746/4428 cut-off events. [2024-11-10 18:20:35,318 INFO L125 PetriNetUnfolderBase]: For 6905/6956 co-relation queries the response was YES. [2024-11-10 18:20:35,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12877 conditions, 4428 events. 2746/4428 cut-off events. For 6905/6956 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27069 event pairs, 698 based on Foata normal form. 0/4248 useless extension candidates. Maximal degree in co-relation 8487. Up to 1607 conditions per place. [2024-11-10 18:20:35,345 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 79 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-10 18:20:35,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 101 transitions, 662 flow [2024-11-10 18:20:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:20:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:20:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-11-10 18:20:35,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-10 18:20:35,347 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 283 flow. Second operand 6 states and 155 transitions. [2024-11-10 18:20:35,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 101 transitions, 662 flow [2024-11-10 18:20:35,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 649 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-10 18:20:35,354 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 288 flow [2024-11-10 18:20:35,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2024-11-10 18:20:35,355 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-11-10 18:20:35,355 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 288 flow [2024-11-10 18:20:35,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-11-10 18:20:35,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:35,355 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:35,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:35,556 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 [2024-11-10 18:20:35,557 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:35,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash 785294075, now seen corresponding path program 2 times [2024-11-10 18:20:35,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:35,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652587473] [2024-11-10 18:20:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:35,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:35,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:35,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652587473] [2024-11-10 18:20:35,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652587473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:35,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168596202] [2024-11-10 18:20:35,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:35,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:35,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:35,708 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) [2024-11-10 18:20:35,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:20:35,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:35,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:35,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 18:20:35,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:35,784 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 [2024-11-10 18:20:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:36,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:36,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168596202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:36,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:36,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-10 18:20:36,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062001483] [2024-11-10 18:20:36,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:36,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 18:20:36,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 18:20:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:20:36,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-10 18:20:36,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 288 flow. Second operand has 18 states, 18 states have (on average 17.944444444444443) internal successors, (323), 18 states have internal predecessors, (323), 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) [2024-11-10 18:20:36,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:36,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-10 18:20:36,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:38,023 INFO L124 PetriNetUnfolderBase]: 3281/5161 cut-off events. [2024-11-10 18:20:38,023 INFO L125 PetriNetUnfolderBase]: For 7169/7169 co-relation queries the response was YES. [2024-11-10 18:20:38,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15307 conditions, 5161 events. 3281/5161 cut-off events. For 7169/7169 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31778 event pairs, 491 based on Foata normal form. 66/5089 useless extension candidates. Maximal degree in co-relation 10314. Up to 994 conditions per place. [2024-11-10 18:20:38,057 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 179 selfloop transitions, 18 changer transitions 0/209 dead transitions. [2024-11-10 18:20:38,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 209 transitions, 1222 flow [2024-11-10 18:20:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 18:20:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-10 18:20:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 418 transitions. [2024-11-10 18:20:38,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44946236559139785 [2024-11-10 18:20:38,060 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 288 flow. Second operand 15 states and 418 transitions. [2024-11-10 18:20:38,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 209 transitions, 1222 flow [2024-11-10 18:20:38,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 209 transitions, 1162 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 18:20:38,070 INFO L231 Difference]: Finished difference. Result has 87 places, 62 transitions, 335 flow [2024-11-10 18:20:38,071 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=335, PETRI_PLACES=87, PETRI_TRANSITIONS=62} [2024-11-10 18:20:38,071 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2024-11-10 18:20:38,071 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 62 transitions, 335 flow [2024-11-10 18:20:38,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.944444444444443) internal successors, (323), 18 states have internal predecessors, (323), 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) [2024-11-10 18:20:38,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:38,072 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:38,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 18:20:38,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:38,273 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:38,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:38,274 INFO L85 PathProgramCache]: Analyzing trace with hash 381465843, now seen corresponding path program 1 times [2024-11-10 18:20:38,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:38,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346290017] [2024-11-10 18:20:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:38,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:38,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346290017] [2024-11-10 18:20:38,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346290017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135713293] [2024-11-10 18:20:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:38,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:38,364 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) [2024-11-10 18:20:38,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:20:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:38,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:20:38,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:38,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:38,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135713293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:38,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:38,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-10 18:20:38,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978807074] [2024-11-10 18:20:38,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:38,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:20:38,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:38,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:20:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:20:38,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:38,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 335 flow. Second operand has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 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) [2024-11-10 18:20:38,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:38,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:38,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:39,365 INFO L124 PetriNetUnfolderBase]: 2905/4559 cut-off events. [2024-11-10 18:20:39,366 INFO L125 PetriNetUnfolderBase]: For 10565/10644 co-relation queries the response was YES. [2024-11-10 18:20:39,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14235 conditions, 4559 events. 2905/4559 cut-off events. For 10565/10644 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27536 event pairs, 1562 based on Foata normal form. 40/4354 useless extension candidates. Maximal degree in co-relation 10546. Up to 2644 conditions per place. [2024-11-10 18:20:39,434 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 87 selfloop transitions, 15 changer transitions 0/117 dead transitions. [2024-11-10 18:20:39,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 117 transitions, 822 flow [2024-11-10 18:20:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:20:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:20:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-11-10 18:20:39,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38548387096774195 [2024-11-10 18:20:39,436 INFO L175 Difference]: Start difference. First operand has 87 places, 62 transitions, 335 flow. Second operand 10 states and 239 transitions. [2024-11-10 18:20:39,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 117 transitions, 822 flow [2024-11-10 18:20:39,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 729 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-11-10 18:20:39,452 INFO L231 Difference]: Finished difference. Result has 89 places, 68 transitions, 357 flow [2024-11-10 18:20:39,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=357, PETRI_PLACES=89, PETRI_TRANSITIONS=68} [2024-11-10 18:20:39,458 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 29 predicate places. [2024-11-10 18:20:39,458 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 68 transitions, 357 flow [2024-11-10 18:20:39,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 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) [2024-11-10 18:20:39,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:39,459 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:39,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 18:20:39,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:39,661 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:39,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1844461517, now seen corresponding path program 2 times [2024-11-10 18:20:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:39,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986157069] [2024-11-10 18:20:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:39,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:20:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986157069] [2024-11-10 18:20:39,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986157069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:39,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995007649] [2024-11-10 18:20:39,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:39,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:39,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:39,966 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) [2024-11-10 18:20:39,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:20:40,039 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:40,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:40,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:20:40,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:20:40,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:40,603 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 35 treesize of output 31 [2024-11-10 18:20:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:20:40,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995007649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:40,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:40,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-10 18:20:40,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509023183] [2024-11-10 18:20:40,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:40,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 18:20:40,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 18:20:40,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-10 18:20:41,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:41,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 68 transitions, 357 flow. Second operand has 23 states, 23 states have (on average 17.217391304347824) internal successors, (396), 23 states have internal predecessors, (396), 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) [2024-11-10 18:20:41,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:41,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:41,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:41,700 INFO L124 PetriNetUnfolderBase]: 2655/4269 cut-off events. [2024-11-10 18:20:41,700 INFO L125 PetriNetUnfolderBase]: For 6483/6513 co-relation queries the response was YES. [2024-11-10 18:20:41,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13020 conditions, 4269 events. 2655/4269 cut-off events. For 6483/6513 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26392 event pairs, 498 based on Foata normal form. 74/4311 useless extension candidates. Maximal degree in co-relation 9338. Up to 1071 conditions per place. [2024-11-10 18:20:41,737 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 103 selfloop transitions, 15 changer transitions 0/133 dead transitions. [2024-11-10 18:20:41,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 133 transitions, 941 flow [2024-11-10 18:20:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:20:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:20:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-11-10 18:20:41,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3986175115207373 [2024-11-10 18:20:41,739 INFO L175 Difference]: Start difference. First operand has 89 places, 68 transitions, 357 flow. Second operand 7 states and 173 transitions. [2024-11-10 18:20:41,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 133 transitions, 941 flow [2024-11-10 18:20:41,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 133 transitions, 932 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:20:41,749 INFO L231 Difference]: Finished difference. Result has 92 places, 69 transitions, 398 flow [2024-11-10 18:20:41,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=92, PETRI_TRANSITIONS=69} [2024-11-10 18:20:41,750 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-10 18:20:41,750 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 69 transitions, 398 flow [2024-11-10 18:20:41,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.217391304347824) internal successors, (396), 23 states have internal predecessors, (396), 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) [2024-11-10 18:20:41,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:41,751 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 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] [2024-11-10 18:20:41,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:41,954 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,SelfDestructingSolverStorable11 [2024-11-10 18:20:41,955 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:41,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1887152625, now seen corresponding path program 1 times [2024-11-10 18:20:41,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:41,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936108402] [2024-11-10 18:20:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:41,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:42,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:42,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936108402] [2024-11-10 18:20:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936108402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:42,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:42,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466030603] [2024-11-10 18:20:42,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:42,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:42,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-10 18:20:42,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 69 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-11-10 18:20:42,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:42,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-10 18:20:42,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:42,595 INFO L124 PetriNetUnfolderBase]: 1964/3609 cut-off events. [2024-11-10 18:20:42,595 INFO L125 PetriNetUnfolderBase]: For 7601/7607 co-relation queries the response was YES. [2024-11-10 18:20:42,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 3609 events. 1964/3609 cut-off events. For 7601/7607 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24370 event pairs, 453 based on Foata normal form. 2/3510 useless extension candidates. Maximal degree in co-relation 8477. Up to 2356 conditions per place. [2024-11-10 18:20:42,634 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 64 selfloop transitions, 4 changer transitions 1/92 dead transitions. [2024-11-10 18:20:42,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 655 flow [2024-11-10 18:20:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-11-10 18:20:42,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-11-10 18:20:42,636 INFO L175 Difference]: Start difference. First operand has 92 places, 69 transitions, 398 flow. Second operand 3 states and 98 transitions. [2024-11-10 18:20:42,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 655 flow [2024-11-10 18:20:42,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 635 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:42,651 INFO L231 Difference]: Finished difference. Result has 92 places, 72 transitions, 410 flow [2024-11-10 18:20:42,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=410, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2024-11-10 18:20:42,652 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-10 18:20:42,653 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 410 flow [2024-11-10 18:20:42,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-11-10 18:20:42,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:42,653 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2024-11-10 18:20:42,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:20:42,653 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:42,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash 837413673, now seen corresponding path program 1 times [2024-11-10 18:20:42,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:42,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953973717] [2024-11-10 18:20:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:42,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:20:42,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:42,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953973717] [2024-11-10 18:20:42,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953973717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:42,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:42,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:20:42,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350221133] [2024-11-10 18:20:42,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:42,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:42,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:42,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:42,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-10 18:20:42,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 410 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:42,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:42,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-10 18:20:42,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:43,237 INFO L124 PetriNetUnfolderBase]: 2478/4122 cut-off events. [2024-11-10 18:20:43,238 INFO L125 PetriNetUnfolderBase]: For 9073/9085 co-relation queries the response was YES. [2024-11-10 18:20:43,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13832 conditions, 4122 events. 2478/4122 cut-off events. For 9073/9085 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26343 event pairs, 936 based on Foata normal form. 133/4176 useless extension candidates. Maximal degree in co-relation 10154. Up to 1824 conditions per place. [2024-11-10 18:20:43,277 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 66 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-11-10 18:20:43,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 656 flow [2024-11-10 18:20:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-10 18:20:43,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-11-10 18:20:43,279 INFO L175 Difference]: Start difference. First operand has 92 places, 72 transitions, 410 flow. Second operand 4 states and 105 transitions. [2024-11-10 18:20:43,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 656 flow [2024-11-10 18:20:43,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 91 transitions, 636 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:43,294 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 376 flow [2024-11-10 18:20:43,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2024-11-10 18:20:43,294 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-10 18:20:43,295 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 376 flow [2024-11-10 18:20:43,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:43,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:43,295 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2024-11-10 18:20:43,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:20:43,296 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:43,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash 910474001, now seen corresponding path program 1 times [2024-11-10 18:20:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:43,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063439542] [2024-11-10 18:20:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:43,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:43,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063439542] [2024-11-10 18:20:43,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063439542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:43,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928655539] [2024-11-10 18:20:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:43,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:43,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:43,356 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) [2024-11-10 18:20:43,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:20:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:43,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:20:43,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:43,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928655539] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:43,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:20:43,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-10 18:20:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671827004] [2024-11-10 18:20:43,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:43,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:20:43,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:20:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:20:43,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:43,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 376 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-10 18:20:43,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:43,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:43,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:43,902 INFO L124 PetriNetUnfolderBase]: 2202/3756 cut-off events. [2024-11-10 18:20:43,903 INFO L125 PetriNetUnfolderBase]: For 7928/7935 co-relation queries the response was YES. [2024-11-10 18:20:43,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12476 conditions, 3756 events. 2202/3756 cut-off events. For 7928/7935 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 23438 event pairs, 827 based on Foata normal form. 108/3781 useless extension candidates. Maximal degree in co-relation 9464. Up to 1748 conditions per place. [2024-11-10 18:20:43,932 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 66 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-11-10 18:20:43,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 623 flow [2024-11-10 18:20:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-10 18:20:43,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-11-10 18:20:43,933 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 376 flow. Second operand 5 states and 120 transitions. [2024-11-10 18:20:43,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 623 flow [2024-11-10 18:20:43,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 87 transitions, 595 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:20:43,945 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 375 flow [2024-11-10 18:20:43,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=375, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2024-11-10 18:20:43,946 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 31 predicate places. [2024-11-10 18:20:43,946 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 375 flow [2024-11-10 18:20:43,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-10 18:20:43,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:43,947 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1] [2024-11-10 18:20:43,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 18:20:44,147 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,SelfDestructingSolverStorable14 [2024-11-10 18:20:44,148 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:44,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:44,148 INFO L85 PathProgramCache]: Analyzing trace with hash -567441847, now seen corresponding path program 1 times [2024-11-10 18:20:44,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:44,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153732091] [2024-11-10 18:20:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:44,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:44,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153732091] [2024-11-10 18:20:44,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153732091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:44,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397412149] [2024-11-10 18:20:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:44,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:44,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:44,724 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) [2024-11-10 18:20:44,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:20:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:44,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-10 18:20:44,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:44,902 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 [2024-11-10 18:20:45,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2024-11-10 18:20:45,185 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 65 treesize of output 61 [2024-11-10 18:20:45,193 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 61 treesize of output 57 [2024-11-10 18:20:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:45,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:45,625 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 177 treesize of output 173 [2024-11-10 18:20:45,629 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 173 treesize of output 169 [2024-11-10 18:20:48,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 188 [2024-11-10 18:20:48,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:20:48,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 240 [2024-11-10 18:20:56,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-11-10 18:20:56,270 INFO L349 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2024-11-10 18:20:56,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 258 [2024-11-10 18:20:56,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 99 [2024-11-10 18:20:56,588 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:56,588 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 128 treesize of output 118 [2024-11-10 18:20:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:57,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397412149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:57,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:57,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2024-11-10 18:20:57,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942184332] [2024-11-10 18:20:57,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:57,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-10 18:20:57,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:57,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-10 18:20:57,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-11-10 18:20:57,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:57,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 375 flow. Second operand has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 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) [2024-11-10 18:20:57,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:57,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:57,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:21:01,094 INFO L124 PetriNetUnfolderBase]: 2484/4204 cut-off events. [2024-11-10 18:21:01,095 INFO L125 PetriNetUnfolderBase]: For 9800/9800 co-relation queries the response was YES. [2024-11-10 18:21:01,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14196 conditions, 4204 events. 2484/4204 cut-off events. For 9800/9800 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 26652 event pairs, 507 based on Foata normal form. 1/4189 useless extension candidates. Maximal degree in co-relation 9458. Up to 2389 conditions per place. [2024-11-10 18:21:01,132 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 115 selfloop transitions, 29 changer transitions 43/201 dead transitions. [2024-11-10 18:21:01,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 201 transitions, 1398 flow [2024-11-10 18:21:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-10 18:21:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-10 18:21:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 522 transitions. [2024-11-10 18:21:01,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36605890603085556 [2024-11-10 18:21:01,136 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 375 flow. Second operand 23 states and 522 transitions. [2024-11-10 18:21:01,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 201 transitions, 1398 flow [2024-11-10 18:21:01,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 201 transitions, 1372 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 18:21:01,157 INFO L231 Difference]: Finished difference. Result has 118 places, 83 transitions, 571 flow [2024-11-10 18:21:01,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=571, PETRI_PLACES=118, PETRI_TRANSITIONS=83} [2024-11-10 18:21:01,157 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 58 predicate places. [2024-11-10 18:21:01,158 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 83 transitions, 571 flow [2024-11-10 18:21:01,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 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) [2024-11-10 18:21:01,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:21:01,158 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1] [2024-11-10 18:21:01,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 18:21:01,362 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,SelfDestructingSolverStorable15 [2024-11-10 18:21:01,363 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:21:01,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:21:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1918010881, now seen corresponding path program 2 times [2024-11-10 18:21:01,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:21:01,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675105535] [2024-11-10 18:21:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:21:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:21:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:21:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:01,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:21:01,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675105535] [2024-11-10 18:21:01,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675105535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:21:01,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772087685] [2024-11-10 18:21:01,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:21:01,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:21:01,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:21:01,887 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) [2024-11-10 18:21:01,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:21:01,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:21:01,974 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:21:01,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-10 18:21:01,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:21:02,044 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 [2024-11-10 18:21:02,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2024-11-10 18:21:02,518 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 55 treesize of output 51 [2024-11-10 18:21:02,521 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 51 treesize of output 47 [2024-11-10 18:21:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:02,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:21:03,153 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 177 treesize of output 173 [2024-11-10 18:21:03,156 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 173 treesize of output 169 [2024-11-10 18:21:05,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-11-10 18:21:05,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:05,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 278 [2024-11-10 18:21:09,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 188 [2024-11-10 18:21:10,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:10,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 240 [2024-11-10 18:21:24,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 99 [2024-11-10 18:21:24,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:24,151 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 128 treesize of output 122 [2024-11-10 18:21:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:24,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772087685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:21:24,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:21:24,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-11-10 18:21:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848337601] [2024-11-10 18:21:24,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:21:24,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-10 18:21:24,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:21:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-10 18:21:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2024-11-10 18:21:25,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:21:25,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 83 transitions, 571 flow. Second operand has 25 states, 25 states have (on average 17.96) internal successors, (449), 25 states have internal predecessors, (449), 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) [2024-11-10 18:21:25,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:21:25,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:21:25,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:21:27,981 INFO L124 PetriNetUnfolderBase]: 2249/3797 cut-off events. [2024-11-10 18:21:27,981 INFO L125 PetriNetUnfolderBase]: For 10923/10929 co-relation queries the response was YES. [2024-11-10 18:21:28,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13632 conditions, 3797 events. 2249/3797 cut-off events. For 10923/10929 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23367 event pairs, 492 based on Foata normal form. 1/3773 useless extension candidates. Maximal degree in co-relation 13594. Up to 2573 conditions per place. [2024-11-10 18:21:28,017 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 74 selfloop transitions, 16 changer transitions 64/168 dead transitions. [2024-11-10 18:21:28,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 168 transitions, 1294 flow [2024-11-10 18:21:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 18:21:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 18:21:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 387 transitions. [2024-11-10 18:21:28,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36717267552182165 [2024-11-10 18:21:28,020 INFO L175 Difference]: Start difference. First operand has 118 places, 83 transitions, 571 flow. Second operand 17 states and 387 transitions. [2024-11-10 18:21:28,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 168 transitions, 1294 flow [2024-11-10 18:21:28,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 168 transitions, 1228 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-11-10 18:21:28,048 INFO L231 Difference]: Finished difference. Result has 125 places, 81 transitions, 564 flow [2024-11-10 18:21:28,048 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=564, PETRI_PLACES=125, PETRI_TRANSITIONS=81} [2024-11-10 18:21:28,049 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2024-11-10 18:21:28,049 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 81 transitions, 564 flow [2024-11-10 18:21:28,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 17.96) internal successors, (449), 25 states have internal predecessors, (449), 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) [2024-11-10 18:21:28,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:21:28,050 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1] [2024-11-10 18:21:28,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 18:21:28,253 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,SelfDestructingSolverStorable16 [2024-11-10 18:21:28,254 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:21:28,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:21:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1047596613, now seen corresponding path program 3 times [2024-11-10 18:21:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:21:28,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53777004] [2024-11-10 18:21:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:21:28,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:21:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:21:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:21:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53777004] [2024-11-10 18:21:28,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53777004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:21:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862085941] [2024-11-10 18:21:28,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:21:28,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:21:28,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:21:28,890 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) [2024-11-10 18:21:28,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:21:28,978 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:21:28,978 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:21:28,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-10 18:21:28,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:21:29,028 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 [2024-11-10 18:21:29,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2024-11-10 18:21:29,438 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 55 treesize of output 51 [2024-11-10 18:21:29,440 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 51 treesize of output 47 [2024-11-10 18:21:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:29,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:21:29,949 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 169 treesize of output 165 [2024-11-10 18:21:29,952 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 165 treesize of output 161 [2024-11-10 18:21:32,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 99 [2024-11-10 18:21:32,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:32,695 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 128 treesize of output 122 [2024-11-10 18:21:33,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-11-10 18:21:33,175 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-10 18:21:33,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-11-10 18:21:33,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 188 [2024-11-10 18:21:33,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:33,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 240 [2024-11-10 18:21:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:35,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862085941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:21:35,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:21:35,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-11-10 18:21:35,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135743297] [2024-11-10 18:21:35,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:21:35,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 18:21:35,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:21:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 18:21:35,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2024-11-10 18:21:35,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:21:35,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 81 transitions, 564 flow. Second operand has 26 states, 26 states have (on average 18.03846153846154) internal successors, (469), 26 states have internal predecessors, (469), 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) [2024-11-10 18:21:35,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:21:35,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:21:35,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:21:37,854 INFO L124 PetriNetUnfolderBase]: 2141/3586 cut-off events. [2024-11-10 18:21:37,855 INFO L125 PetriNetUnfolderBase]: For 10923/10987 co-relation queries the response was YES. [2024-11-10 18:21:37,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13092 conditions, 3586 events. 2141/3586 cut-off events. For 10923/10987 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21735 event pairs, 500 based on Foata normal form. 17/3580 useless extension candidates. Maximal degree in co-relation 13050. Up to 2575 conditions per place. [2024-11-10 18:21:37,895 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 76 selfloop transitions, 16 changer transitions 43/149 dead transitions. [2024-11-10 18:21:37,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 149 transitions, 1162 flow [2024-11-10 18:21:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 18:21:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 18:21:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 355 transitions. [2024-11-10 18:21:37,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35786290322580644 [2024-11-10 18:21:37,897 INFO L175 Difference]: Start difference. First operand has 125 places, 81 transitions, 564 flow. Second operand 16 states and 355 transitions. [2024-11-10 18:21:37,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 149 transitions, 1162 flow [2024-11-10 18:21:37,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 149 transitions, 1089 flow, removed 16 selfloop flow, removed 17 redundant places. [2024-11-10 18:21:37,922 INFO L231 Difference]: Finished difference. Result has 120 places, 79 transitions, 533 flow [2024-11-10 18:21:37,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=533, PETRI_PLACES=120, PETRI_TRANSITIONS=79} [2024-11-10 18:21:37,922 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-11-10 18:21:37,922 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 79 transitions, 533 flow [2024-11-10 18:21:37,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.03846153846154) internal successors, (469), 26 states have internal predecessors, (469), 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) [2024-11-10 18:21:37,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:21:37,923 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1] [2024-11-10 18:21:37,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 18:21:38,127 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,SelfDestructingSolverStorable17 [2024-11-10 18:21:38,128 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:21:38,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:21:38,128 INFO L85 PathProgramCache]: Analyzing trace with hash -97688025, now seen corresponding path program 4 times [2024-11-10 18:21:38,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:21:38,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897829534] [2024-11-10 18:21:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:21:38,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:21:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:21:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:38,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:21:38,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897829534] [2024-11-10 18:21:38,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897829534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:21:38,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896037732] [2024-11-10 18:21:38,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 18:21:38,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:21:38,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:21:38,689 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) [2024-11-10 18:21:38,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 18:21:38,763 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 18:21:38,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:21:38,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 18:21:38,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:21:39,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:39,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 119 [2024-11-10 18:21:39,107 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 95 treesize of output 91 [2024-11-10 18:21:39,112 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 91 treesize of output 87 [2024-11-10 18:21:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:21:39,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:21:40,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:40,119 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 169 treesize of output 121 [2024-11-10 18:21:40,124 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 113 treesize of output 109 [2024-11-10 18:21:40,128 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 109 treesize of output 105 [2024-11-10 18:21:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:21:40,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896037732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:21:40,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:21:40,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2024-11-10 18:21:40,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663326016] [2024-11-10 18:21:40,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:21:40,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 18:21:40,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:21:40,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 18:21:40,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2024-11-10 18:21:41,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 62 [2024-11-10 18:21:41,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 79 transitions, 533 flow. Second operand has 26 states, 26 states have (on average 16.346153846153847) internal successors, (425), 26 states have internal predecessors, (425), 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) [2024-11-10 18:21:41,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:21:41,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 62 [2024-11-10 18:21:41,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:21:43,328 INFO L124 PetriNetUnfolderBase]: 4570/7160 cut-off events. [2024-11-10 18:21:43,328 INFO L125 PetriNetUnfolderBase]: For 15636/15648 co-relation queries the response was YES. [2024-11-10 18:21:43,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24714 conditions, 7160 events. 4570/7160 cut-off events. For 15636/15648 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 45480 event pairs, 610 based on Foata normal form. 6/7140 useless extension candidates. Maximal degree in co-relation 24675. Up to 3898 conditions per place. [2024-11-10 18:21:43,444 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 153 selfloop transitions, 48 changer transitions 63/272 dead transitions. [2024-11-10 18:21:43,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 272 transitions, 2071 flow [2024-11-10 18:21:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-10 18:21:43,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-10 18:21:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 516 transitions. [2024-11-10 18:21:43,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-11-10 18:21:43,453 INFO L175 Difference]: Start difference. First operand has 120 places, 79 transitions, 533 flow. Second operand 24 states and 516 transitions. [2024-11-10 18:21:43,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 272 transitions, 2071 flow [2024-11-10 18:21:43,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 272 transitions, 2001 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-11-10 18:21:43,537 INFO L231 Difference]: Finished difference. Result has 134 places, 107 transitions, 841 flow [2024-11-10 18:21:43,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=841, PETRI_PLACES=134, PETRI_TRANSITIONS=107} [2024-11-10 18:21:43,538 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2024-11-10 18:21:43,542 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 107 transitions, 841 flow [2024-11-10 18:21:43,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.346153846153847) internal successors, (425), 26 states have internal predecessors, (425), 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) [2024-11-10 18:21:43,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:21:43,543 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1] [2024-11-10 18:21:43,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-10 18:21:43,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:21:43,744 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:21:43,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:21:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1700706945, now seen corresponding path program 5 times [2024-11-10 18:21:43,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:21:43,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375894219] [2024-11-10 18:21:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:21:43,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:21:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:21:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:44,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:21:44,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375894219] [2024-11-10 18:21:44,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375894219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:21:44,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198708836] [2024-11-10 18:21:44,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 18:21:44,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:21:44,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:21:44,702 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) [2024-11-10 18:21:44,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 18:21:44,778 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:21:44,779 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:21:44,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-10 18:21:44,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:21:44,916 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 [2024-11-10 18:21:45,483 INFO L349 Elim1Store]: treesize reduction 33, result has 42.1 percent of original size [2024-11-10 18:21:45,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 119 treesize of output 106 [2024-11-10 18:21:45,488 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 83 treesize of output 79 [2024-11-10 18:21:45,492 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 79 treesize of output 75 [2024-11-10 18:21:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:45,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:21:46,194 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 139 treesize of output 135 [2024-11-10 18:21:46,198 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 135 treesize of output 131