./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/loop-tiling-eq.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 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:24:20,310 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:24:20,385 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:24:20,390 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:24:20,392 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:24:20,426 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:24:20,426 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:24:20,427 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:24:20,427 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:24:20,429 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:24:20,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:24:20,430 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:24:20,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:24:20,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:24:20,431 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:24:20,431 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:24:20,431 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:24:20,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:24:20,435 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:24:20,435 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:24:20,436 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:24:20,436 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:24:20,437 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:24:20,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:24:20,437 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:24:20,438 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:24:20,438 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:24:20,438 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:24:20,439 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:24:20,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:24:20,439 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:24:20,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:24:20,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:24:20,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:24:20,440 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:24:20,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:24:20,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:24:20,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:24:20,442 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:24:20,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:24:20,442 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:24:20,443 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:24:20,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 [2024-11-12 16:24:20,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:24:20,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:24:20,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:24:20,712 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:24:20,712 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:24:20,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2024-11-12 16:24:22,226 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:24:22,422 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:24:22,423 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2024-11-12 16:24:22,431 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c37e7f34/f978050c87e74abaa53764d3ebe4a678/FLAG9157e4a86 [2024-11-12 16:24:22,448 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c37e7f34/f978050c87e74abaa53764d3ebe4a678 [2024-11-12 16:24:22,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:24:22,452 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:24:22,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:24:22,453 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:24:22,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:24:22,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48294f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22, skipping insertion in model container [2024-11-12 16:24:22,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,484 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:24:22,700 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:24:22,715 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:24:22,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:24:22,730 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:24:22,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:24:22,787 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:24:22,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22 WrapperNode [2024-11-12 16:24:22,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:24:22,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:24:22,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:24:22,789 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:24:22,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,835 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 186 [2024-11-12 16:24:22,836 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:24:22,836 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:24:22,836 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:24:22,837 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:24:22,846 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,850 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,870 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 3, 9]. 64 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 1, 5]. [2024-11-12 16:24:22,871 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,892 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:24:22,903 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:24:22,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:24:22,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:24:22,904 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (1/1) ... [2024-11-12 16:24:22,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:24:22,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:24:22,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 16:24:22,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 16:24:23,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-12 16:24:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-12 16:24:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-12 16:24:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:24:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:24:23,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:24:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:24:23,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:24:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:24:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:24:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:24:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-12 16:24:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-12 16:24:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-12 16:24:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:24:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:24:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:24:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:24:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:24:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:24:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:24:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:24:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:24:23,005 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:24:23,115 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:24:23,116 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:24:23,566 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:24:23,566 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:24:23,881 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:24:23,881 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-12 16:24:23,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:24:23 BoogieIcfgContainer [2024-11-12 16:24:23,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:24:23,884 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:24:23,884 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:24:23,887 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:24:23,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:24:22" (1/3) ... [2024-11-12 16:24:23,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c967b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:24:23, skipping insertion in model container [2024-11-12 16:24:23,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:24:22" (2/3) ... [2024-11-12 16:24:23,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c967b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:24:23, skipping insertion in model container [2024-11-12 16:24:23,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:24:23" (3/3) ... [2024-11-12 16:24:23,890 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2024-11-12 16:24:23,907 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:24:23,908 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2024-11-12 16:24:23,908 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:24:23,970 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:24:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 146 flow [2024-11-12 16:24:24,046 INFO L124 PetriNetUnfolderBase]: 7/64 cut-off events. [2024-11-12 16:24:24,046 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:24:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 7/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 157 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2024-11-12 16:24:24,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 146 flow [2024-11-12 16:24:24,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 63 transitions, 138 flow [2024-11-12 16:24:24,068 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:24:24,076 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;@6abc8a16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:24:24,076 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-12 16:24:24,080 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:24:24,081 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:24:24,082 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:24:24,082 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:24:24,082 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:24:24,083 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:24:24,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:24:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash 724435, now seen corresponding path program 1 times [2024-11-12 16:24:24,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:24:24,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828495354] [2024-11-12 16:24:24,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:24,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:24:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:24:24,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:24:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828495354] [2024-11-12 16:24:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828495354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:24:24,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:24:24,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:24:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340622678] [2024-11-12 16:24:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:24:24,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:24:24,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:24:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:24:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:24:24,495 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-12 16:24:24,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2024-11-12 16:24:24,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:24:24,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-12 16:24:24,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:24:24,620 INFO L124 PetriNetUnfolderBase]: 58/178 cut-off events. [2024-11-12 16:24:24,621 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-12 16:24:24,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 178 events. 58/178 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 699 event pairs, 30 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 222. Up to 96 conditions per place. [2024-11-12 16:24:24,626 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 25 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-12 16:24:24,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 186 flow [2024-11-12 16:24:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:24:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:24:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-12 16:24:24,641 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-11-12 16:24:24,643 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2024-11-12 16:24:24,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 186 flow [2024-11-12 16:24:24,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 178 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:24:24,650 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 128 flow [2024-11-12 16:24:24,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2024-11-12 16:24:24,655 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2024-11-12 16:24:24,655 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 128 flow [2024-11-12 16:24:24,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2024-11-12 16:24:24,655 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:24:24,656 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:24:24,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:24:24,656 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:24:24,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:24:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash 724436, now seen corresponding path program 1 times [2024-11-12 16:24:24,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:24:24,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756841999] [2024-11-12 16:24:24,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:24,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:24:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-12 16:24:24,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881318581] [2024-11-12 16:24:24,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:24,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:24:24,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:24:24,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:24:24,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:24:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:24,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-12 16:24:24,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:24:25,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:24:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:24:29,988 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:24:29,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:24:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756841999] [2024-11-12 16:24:29,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-12 16:24:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881318581] [2024-11-12 16:24:29,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881318581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:24:29,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:24:29,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:24:29,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739256008] [2024-11-12 16:24:29,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:24:29,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:24:29,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:24:29,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:24:29,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=6, Unknown=1, NotChecked=0, Total=12 [2024-11-12 16:24:34,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-12 16:24:38,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-12 16:24:42,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-12 16:24:46,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-12 16:24:50,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-12 16:24:54,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-12 16:24:54,681 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 66 [2024-11-12 16:24:54,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:54,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:24:54,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 66 [2024-11-12 16:24:54,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:24:56,356 INFO L124 PetriNetUnfolderBase]: 201/407 cut-off events. [2024-11-12 16:24:56,356 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:24:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 407 events. 201/407 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1808 event pairs, 151 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 733. Up to 348 conditions per place. [2024-11-12 16:24:56,360 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 41 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-12 16:24:56,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 216 flow [2024-11-12 16:24:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:24:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:24:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-12 16:24:56,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-11-12 16:24:56,364 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 128 flow. Second operand 4 states and 106 transitions. [2024-11-12 16:24:56,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 216 flow [2024-11-12 16:24:56,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:24:56,367 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 126 flow [2024-11-12 16:24:56,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-11-12 16:24:56,369 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2024-11-12 16:24:56,369 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 126 flow [2024-11-12 16:24:56,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:56,369 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:24:56,369 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:24:56,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 16:24:56,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:24:56,570 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:24:56,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:24:56,571 INFO L85 PathProgramCache]: Analyzing trace with hash 22458754, now seen corresponding path program 1 times [2024-11-12 16:24:56,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:24:56,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714232520] [2024-11-12 16:24:56,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:24:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:24:56,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:24:56,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714232520] [2024-11-12 16:24:56,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714232520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:24:56,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:24:56,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:24:56,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732112814] [2024-11-12 16:24:56,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:24:56,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:24:56,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:24:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:24:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:24:56,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 66 [2024-11-12 16:24:56,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:56,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:24:56,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 66 [2024-11-12 16:24:56,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:24:57,047 INFO L124 PetriNetUnfolderBase]: 60/185 cut-off events. [2024-11-12 16:24:57,047 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:24:57,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 185 events. 60/185 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 715 event pairs, 30 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 272. Up to 107 conditions per place. [2024-11-12 16:24:57,050 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 29 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-12 16:24:57,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 218 flow [2024-11-12 16:24:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:24:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:24:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-11-12 16:24:57,055 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6704545454545454 [2024-11-12 16:24:57,056 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 126 flow. Second operand 4 states and 177 transitions. [2024-11-12 16:24:57,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 218 flow [2024-11-12 16:24:57,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 204 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:24:57,058 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 158 flow [2024-11-12 16:24:57,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2024-11-12 16:24:57,061 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2024-11-12 16:24:57,061 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 158 flow [2024-11-12 16:24:57,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:57,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:24:57,061 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:24:57,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:24:57,062 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:24:57,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:24:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash 107577511, now seen corresponding path program 1 times [2024-11-12 16:24:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:24:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681227023] [2024-11-12 16:24:57,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:57,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:24:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:24:57,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:24:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681227023] [2024-11-12 16:24:57,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681227023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:24:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119203876] [2024-11-12 16:24:57,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:57,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:24:57,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:24:57,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:24:57,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:24:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:57,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:24:57,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:24:57,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:24:57,726 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:24:57,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:24:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:24:57,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:24:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:24:57,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119203876] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:24:57,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:24:57,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-12 16:24:57,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079812386] [2024-11-12 16:24:57,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:24:57,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:24:57,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:24:57,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:24:57,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:24:58,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-12 16:24:58,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:58,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:24:58,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-12 16:24:58,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:24:58,474 INFO L124 PetriNetUnfolderBase]: 115/353 cut-off events. [2024-11-12 16:24:58,475 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 16:24:58,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 353 events. 115/353 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1794 event pairs, 60 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 292. Up to 107 conditions per place. [2024-11-12 16:24:58,478 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 55 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2024-11-12 16:24:58,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 336 flow [2024-11-12 16:24:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:24:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:24:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-11-12 16:24:58,483 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-11-12 16:24:58,483 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 158 flow. Second operand 5 states and 222 transitions. [2024-11-12 16:24:58,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 336 flow [2024-11-12 16:24:58,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:24:58,487 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 175 flow [2024-11-12 16:24:58,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-11-12 16:24:58,488 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2024-11-12 16:24:58,489 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 175 flow [2024-11-12 16:24:58,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:58,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:24:58,490 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:24:58,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 16:24:58,693 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,SelfDestructingSolverStorable3 [2024-11-12 16:24:58,694 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:24:58,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:24:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash 108124106, now seen corresponding path program 1 times [2024-11-12 16:24:58,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:24:58,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777255297] [2024-11-12 16:24:58,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:58,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:24:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:24:59,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:24:59,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777255297] [2024-11-12 16:24:59,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777255297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:24:59,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:24:59,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:24:59,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830440851] [2024-11-12 16:24:59,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:24:59,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:24:59,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:24:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:24:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:24:59,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-12 16:24:59,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:59,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:24:59,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-12 16:24:59,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:24:59,612 INFO L124 PetriNetUnfolderBase]: 139/391 cut-off events. [2024-11-12 16:24:59,612 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-12 16:24:59,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 391 events. 139/391 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1971 event pairs, 76 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 340. Up to 247 conditions per place. [2024-11-12 16:24:59,615 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 35 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-11-12 16:24:59,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 273 flow [2024-11-12 16:24:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:24:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:24:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 231 transitions. [2024-11-12 16:24:59,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-12 16:24:59,617 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 175 flow. Second operand 6 states and 231 transitions. [2024-11-12 16:24:59,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 273 flow [2024-11-12 16:24:59,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:24:59,620 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 216 flow [2024-11-12 16:24:59,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-11-12 16:24:59,621 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2024-11-12 16:24:59,621 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 216 flow [2024-11-12 16:24:59,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:59,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:24:59,621 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:24:59,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:24:59,622 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:24:59,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:24:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 108124105, now seen corresponding path program 1 times [2024-11-12 16:24:59,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:24:59,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469439681] [2024-11-12 16:24:59,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:24:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:24:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:24:59,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:24:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469439681] [2024-11-12 16:24:59,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469439681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:24:59,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:24:59,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:24:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122206259] [2024-11-12 16:24:59,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:24:59,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:24:59,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:24:59,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:24:59,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:24:59,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-12 16:24:59,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:59,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:24:59,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-12 16:24:59,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:24:59,854 INFO L124 PetriNetUnfolderBase]: 139/373 cut-off events. [2024-11-12 16:24:59,854 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-12 16:24:59,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 373 events. 139/373 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1773 event pairs, 76 based on Foata normal form. 4/307 useless extension candidates. Maximal degree in co-relation 638. Up to 245 conditions per place. [2024-11-12 16:24:59,857 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 37 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-11-12 16:24:59,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 290 flow [2024-11-12 16:24:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:24:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:24:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-12 16:24:59,858 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2024-11-12 16:24:59,858 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 216 flow. Second operand 3 states and 124 transitions. [2024-11-12 16:24:59,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 290 flow [2024-11-12 16:24:59,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:24:59,860 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 209 flow [2024-11-12 16:24:59,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-11-12 16:24:59,861 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-11-12 16:24:59,862 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 209 flow [2024-11-12 16:24:59,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:24:59,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:24:59,862 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:24:59,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:24:59,863 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:24:59,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:24:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash 108124079, now seen corresponding path program 1 times [2024-11-12 16:24:59,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:24:59,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776021910] [2024-11-12 16:24:59,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:24:59,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:24:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:25:00,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:00,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776021910] [2024-11-12 16:25:00,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776021910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:25:00,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:25:00,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:25:00,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968085500] [2024-11-12 16:25:00,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:25:00,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:25:00,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:25:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:25:00,274 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-12 16:25:00,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:00,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:00,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-12 16:25:00,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:00,482 INFO L124 PetriNetUnfolderBase]: 123/363 cut-off events. [2024-11-12 16:25:00,482 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-12 16:25:00,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 363 events. 123/363 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1816 event pairs, 60 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 591. Up to 227 conditions per place. [2024-11-12 16:25:00,485 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 35 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-11-12 16:25:00,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 315 flow [2024-11-12 16:25:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:25:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:25:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 198 transitions. [2024-11-12 16:25:00,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-12 16:25:00,486 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 209 flow. Second operand 5 states and 198 transitions. [2024-11-12 16:25:00,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 315 flow [2024-11-12 16:25:00,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:25:00,488 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 266 flow [2024-11-12 16:25:00,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-11-12 16:25:00,491 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2024-11-12 16:25:00,492 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 266 flow [2024-11-12 16:25:00,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:00,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:00,492 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:00,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:25:00,493 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:00,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash 302796215, now seen corresponding path program 1 times [2024-11-12 16:25:00,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:00,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739425317] [2024-11-12 16:25:00,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:00,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:25:00,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:00,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739425317] [2024-11-12 16:25:00,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739425317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:00,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799247036] [2024-11-12 16:25:00,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:00,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:00,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:00,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:25:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:00,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:25:00,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:25:00,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:25:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799247036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:00,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:00,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 16:25:00,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277044061] [2024-11-12 16:25:00,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:00,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:25:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:25:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:25:01,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 66 [2024-11-12 16:25:01,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 266 flow. Second operand has 13 states, 13 states have (on average 36.53846153846154) internal successors, (475), 13 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:01,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:01,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 66 [2024-11-12 16:25:01,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:01,502 INFO L124 PetriNetUnfolderBase]: 233/682 cut-off events. [2024-11-12 16:25:01,503 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-11-12 16:25:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 682 events. 233/682 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4068 event pairs, 120 based on Foata normal form. 1/521 useless extension candidates. Maximal degree in co-relation 665. Up to 216 conditions per place. [2024-11-12 16:25:01,508 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 49 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-11-12 16:25:01,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 97 transitions, 524 flow [2024-11-12 16:25:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:25:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:25:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 380 transitions. [2024-11-12 16:25:01,510 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6397306397306397 [2024-11-12 16:25:01,510 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 266 flow. Second operand 9 states and 380 transitions. [2024-11-12 16:25:01,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 97 transitions, 524 flow [2024-11-12 16:25:01,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 515 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:25:01,516 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 400 flow [2024-11-12 16:25:01,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=400, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2024-11-12 16:25:01,517 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2024-11-12 16:25:01,519 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 400 flow [2024-11-12 16:25:01,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 36.53846153846154) internal successors, (475), 13 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:01,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:01,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:01,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:25:01,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:01,720 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:01,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash 829441052, now seen corresponding path program 1 times [2024-11-12 16:25:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:01,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536722852] [2024-11-12 16:25:01,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:01,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:25:01,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:01,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536722852] [2024-11-12 16:25:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536722852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:25:01,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:25:01,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:25:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757540026] [2024-11-12 16:25:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:25:01,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:25:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:25:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:25:01,835 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-12 16:25:01,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 400 flow. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:01,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:01,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-12 16:25:01,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:02,163 INFO L124 PetriNetUnfolderBase]: 337/973 cut-off events. [2024-11-12 16:25:02,163 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-12 16:25:02,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1886 conditions, 973 events. 337/973 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6328 event pairs, 156 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 1242. Up to 269 conditions per place. [2024-11-12 16:25:02,168 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 75 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2024-11-12 16:25:02,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 735 flow [2024-11-12 16:25:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:25:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:25:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 274 transitions. [2024-11-12 16:25:02,170 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6919191919191919 [2024-11-12 16:25:02,170 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 400 flow. Second operand 6 states and 274 transitions. [2024-11-12 16:25:02,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 735 flow [2024-11-12 16:25:02,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 690 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-12 16:25:02,176 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 467 flow [2024-11-12 16:25:02,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2024-11-12 16:25:02,178 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2024-11-12 16:25:02,179 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 467 flow [2024-11-12 16:25:02,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:02,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:02,180 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:02,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:25:02,180 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:02,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash 828047822, now seen corresponding path program 1 times [2024-11-12 16:25:02,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:02,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966218491] [2024-11-12 16:25:02,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:02,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:25:02,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:02,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966218491] [2024-11-12 16:25:02,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966218491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:02,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986637198] [2024-11-12 16:25:02,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:02,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:02,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:02,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:02,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:25:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:02,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:25:02,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:02,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:25:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:25:02,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:25:03,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986637198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:03,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:03,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:25:03,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751286904] [2024-11-12 16:25:03,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:03,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:25:03,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:03,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:25:03,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:25:04,081 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-12 16:25:04,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 467 flow. Second operand has 13 states, 13 states have (on average 33.61538461538461) internal successors, (437), 13 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:04,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:04,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-12 16:25:04,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:04,646 INFO L124 PetriNetUnfolderBase]: 305/983 cut-off events. [2024-11-12 16:25:04,647 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2024-11-12 16:25:04,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2077 conditions, 983 events. 305/983 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6942 event pairs, 180 based on Foata normal form. 6/737 useless extension candidates. Maximal degree in co-relation 1314. Up to 550 conditions per place. [2024-11-12 16:25:04,652 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 35 selfloop transitions, 26 changer transitions 0/84 dead transitions. [2024-11-12 16:25:04,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 585 flow [2024-11-12 16:25:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:25:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:25:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-11-12 16:25:04,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-11-12 16:25:04,654 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 467 flow. Second operand 7 states and 261 transitions. [2024-11-12 16:25:04,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 585 flow [2024-11-12 16:25:04,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 84 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:25:04,659 INFO L231 Difference]: Finished difference. Result has 89 places, 84 transitions, 506 flow [2024-11-12 16:25:04,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2024-11-12 16:25:04,661 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-11-12 16:25:04,661 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 506 flow [2024-11-12 16:25:04,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 33.61538461538461) internal successors, (437), 13 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:04,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:04,662 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-12 16:25:04,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:25:04,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:04,862 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:04,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash -99478682, now seen corresponding path program 1 times [2024-11-12 16:25:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:04,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025954177] [2024-11-12 16:25:04,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:25:05,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025954177] [2024-11-12 16:25:05,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025954177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385603354] [2024-11-12 16:25:05,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:05,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:05,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:05,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:05,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:25:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:05,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 16:25:05,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:05,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 16:25:05,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:25:05,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:05,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:25:05,665 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:25:05,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:25:05,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:05,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2024-11-12 16:25:05,852 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:25:05,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:25:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:25:06,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:06,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:25:06,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 43 treesize of output 61 [2024-11-12 16:25:06,538 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 16:25:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:25:06,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385603354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:06,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:06,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-12 16:25:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339761503] [2024-11-12 16:25:06,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:06,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:25:06,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:25:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:25:08,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-12 16:25:08,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 506 flow. Second operand has 18 states, 18 states have (on average 27.5) internal successors, (495), 18 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:08,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:08,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-12 16:25:08,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:09,506 INFO L124 PetriNetUnfolderBase]: 357/1070 cut-off events. [2024-11-12 16:25:09,506 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-11-12 16:25:09,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2354 conditions, 1070 events. 357/1070 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7498 event pairs, 228 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 1489. Up to 631 conditions per place. [2024-11-12 16:25:09,512 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 48 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-11-12 16:25:09,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 689 flow [2024-11-12 16:25:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:25:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:25:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-11-12 16:25:09,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-11-12 16:25:09,514 INFO L175 Difference]: Start difference. First operand has 89 places, 84 transitions, 506 flow. Second operand 8 states and 246 transitions. [2024-11-12 16:25:09,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 689 flow [2024-11-12 16:25:09,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 614 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-12 16:25:09,519 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 477 flow [2024-11-12 16:25:09,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2024-11-12 16:25:09,520 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-11-12 16:25:09,520 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 477 flow [2024-11-12 16:25:09,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.5) internal successors, (495), 18 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:09,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:09,521 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-12 16:25:09,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:25:09,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-12 16:25:09,725 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:09,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:09,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1524039076, now seen corresponding path program 2 times [2024-11-12 16:25:09,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:09,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506189993] [2024-11-12 16:25:09,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:09,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:25:10,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:10,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506189993] [2024-11-12 16:25:10,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506189993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:10,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977408011] [2024-11-12 16:25:10,111 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:25:10,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:10,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:10,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:10,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:25:10,198 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:25:10,198 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:25:10,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 16:25:10,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:10,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:25:10,400 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:25:10,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-12 16:25:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:25:10,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:25:10,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977408011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:10,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:10,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:25:10,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786376521] [2024-11-12 16:25:10,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:10,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:25:10,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:10,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:25:10,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:25:12,794 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-12 16:25:12,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 477 flow. Second operand has 19 states, 19 states have (on average 33.578947368421055) internal successors, (638), 19 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:12,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:12,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-12 16:25:12,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:14,149 INFO L124 PetriNetUnfolderBase]: 363/1157 cut-off events. [2024-11-12 16:25:14,149 INFO L125 PetriNetUnfolderBase]: For 372/381 co-relation queries the response was YES. [2024-11-12 16:25:14,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2456 conditions, 1157 events. 363/1157 cut-off events. For 372/381 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8311 event pairs, 210 based on Foata normal form. 6/871 useless extension candidates. Maximal degree in co-relation 1389. Up to 564 conditions per place. [2024-11-12 16:25:14,157 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 81 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2024-11-12 16:25:14,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 123 transitions, 881 flow [2024-11-12 16:25:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:25:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:25:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 500 transitions. [2024-11-12 16:25:14,160 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5827505827505828 [2024-11-12 16:25:14,160 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 477 flow. Second operand 13 states and 500 transitions. [2024-11-12 16:25:14,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 123 transitions, 881 flow [2024-11-12 16:25:14,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 123 transitions, 795 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-11-12 16:25:14,166 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 492 flow [2024-11-12 16:25:14,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=492, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2024-11-12 16:25:14,169 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2024-11-12 16:25:14,169 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 492 flow [2024-11-12 16:25:14,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 33.578947368421055) internal successors, (638), 19 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:14,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:14,171 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:14,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:25:14,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:14,372 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:14,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 497412828, now seen corresponding path program 1 times [2024-11-12 16:25:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:14,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768399360] [2024-11-12 16:25:14,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:14,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:25:14,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:14,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768399360] [2024-11-12 16:25:14,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768399360] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:25:14,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:25:14,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:25:14,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431330486] [2024-11-12 16:25:14,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:25:14,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:25:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:25:14,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:25:14,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 66 [2024-11-12 16:25:14,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 492 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:14,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:14,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 66 [2024-11-12 16:25:14,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:14,701 INFO L124 PetriNetUnfolderBase]: 324/1018 cut-off events. [2024-11-12 16:25:14,701 INFO L125 PetriNetUnfolderBase]: For 313/313 co-relation queries the response was YES. [2024-11-12 16:25:14,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 1018 events. 324/1018 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6727 event pairs, 176 based on Foata normal form. 4/808 useless extension candidates. Maximal degree in co-relation 2218. Up to 412 conditions per place. [2024-11-12 16:25:14,708 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 71 selfloop transitions, 9 changer transitions 9/112 dead transitions. [2024-11-12 16:25:14,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 112 transitions, 780 flow [2024-11-12 16:25:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:25:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:25:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-11-12 16:25:14,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6909090909090909 [2024-11-12 16:25:14,709 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 492 flow. Second operand 5 states and 228 transitions. [2024-11-12 16:25:14,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 112 transitions, 780 flow [2024-11-12 16:25:14,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 112 transitions, 749 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-12 16:25:14,714 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 496 flow [2024-11-12 16:25:14,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-11-12 16:25:14,715 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 34 predicate places. [2024-11-12 16:25:14,715 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 496 flow [2024-11-12 16:25:14,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:14,716 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:14,716 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:14,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:25:14,717 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:14,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2028125649, now seen corresponding path program 1 times [2024-11-12 16:25:14,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:14,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20431413] [2024-11-12 16:25:14,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:14,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:25:14,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20431413] [2024-11-12 16:25:14,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20431413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270999974] [2024-11-12 16:25:14,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:14,991 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:14,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:25:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:15,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:25:15,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:25:15,223 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:25:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270999974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:15,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:15,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-12 16:25:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141199466] [2024-11-12 16:25:15,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:15,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:25:15,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:25:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:25:16,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-12 16:25:16,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 496 flow. Second operand has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:16,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:16,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-12 16:25:16,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:18,013 INFO L124 PetriNetUnfolderBase]: 275/832 cut-off events. [2024-11-12 16:25:18,013 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2024-11-12 16:25:18,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 832 events. 275/832 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5023 event pairs, 166 based on Foata normal form. 3/644 useless extension candidates. Maximal degree in co-relation 1943. Up to 325 conditions per place. [2024-11-12 16:25:18,018 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 55 selfloop transitions, 42 changer transitions 3/122 dead transitions. [2024-11-12 16:25:18,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 122 transitions, 886 flow [2024-11-12 16:25:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 16:25:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 16:25:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 601 transitions. [2024-11-12 16:25:18,021 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535650623885918 [2024-11-12 16:25:18,021 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 496 flow. Second operand 17 states and 601 transitions. [2024-11-12 16:25:18,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 122 transitions, 886 flow [2024-11-12 16:25:18,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 122 transitions, 871 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:25:18,026 INFO L231 Difference]: Finished difference. Result has 112 places, 98 transitions, 652 flow [2024-11-12 16:25:18,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=652, PETRI_PLACES=112, PETRI_TRANSITIONS=98} [2024-11-12 16:25:18,027 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 49 predicate places. [2024-11-12 16:25:18,027 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 98 transitions, 652 flow [2024-11-12 16:25:18,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:18,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:18,028 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-12 16:25:18,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:25:18,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:18,229 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:18,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:18,229 INFO L85 PathProgramCache]: Analyzing trace with hash -17680852, now seen corresponding path program 3 times [2024-11-12 16:25:18,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:18,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742253457] [2024-11-12 16:25:18,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:18,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:25:18,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:18,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742253457] [2024-11-12 16:25:18,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742253457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:18,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104761976] [2024-11-12 16:25:18,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:25:18,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:18,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:18,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:25:18,510 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:25:18,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:25:18,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 16:25:18,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:18,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:25:18,686 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:25:18,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 24 [2024-11-12 16:25:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:25:18,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:25:19,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104761976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:19,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:19,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:25:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128664674] [2024-11-12 16:25:19,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:19,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:25:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:19,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:25:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:25:20,369 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-12 16:25:20,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 98 transitions, 652 flow. Second operand has 18 states, 18 states have (on average 33.77777777777778) internal successors, (608), 18 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:20,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:20,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-12 16:25:20,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:21,548 INFO L124 PetriNetUnfolderBase]: 221/716 cut-off events. [2024-11-12 16:25:21,549 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-11-12 16:25:21,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 716 events. 221/716 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4376 event pairs, 120 based on Foata normal form. 3/545 useless extension candidates. Maximal degree in co-relation 1684. Up to 396 conditions per place. [2024-11-12 16:25:21,552 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 37 selfloop transitions, 45 changer transitions 0/104 dead transitions. [2024-11-12 16:25:21,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 104 transitions, 862 flow [2024-11-12 16:25:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-12 16:25:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-12 16:25:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 731 transitions. [2024-11-12 16:25:21,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5274170274170275 [2024-11-12 16:25:21,555 INFO L175 Difference]: Start difference. First operand has 112 places, 98 transitions, 652 flow. Second operand 21 states and 731 transitions. [2024-11-12 16:25:21,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 104 transitions, 862 flow [2024-11-12 16:25:21,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 104 transitions, 796 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-11-12 16:25:21,561 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 722 flow [2024-11-12 16:25:21,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=722, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2024-11-12 16:25:21,562 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 57 predicate places. [2024-11-12 16:25:21,562 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 722 flow [2024-11-12 16:25:21,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 33.77777777777778) internal successors, (608), 18 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:21,563 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:21,563 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:21,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:25:21,765 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,SelfDestructingSolverStorable14 [2024-11-12 16:25:21,765 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:21,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash 640061632, now seen corresponding path program 1 times [2024-11-12 16:25:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:21,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813105554] [2024-11-12 16:25:21,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:21,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:25:21,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813105554] [2024-11-12 16:25:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813105554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319062226] [2024-11-12 16:25:21,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:21,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:21,890 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:21,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:25:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:21,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:25:21,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:25:22,071 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:25:22,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319062226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:25:22,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:25:22,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2024-11-12 16:25:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450194973] [2024-11-12 16:25:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:25:22,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:25:22,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:25:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:25:22,127 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-12 16:25:22,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 722 flow. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:22,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:22,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-12 16:25:22,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:22,382 INFO L124 PetriNetUnfolderBase]: 433/1232 cut-off events. [2024-11-12 16:25:22,383 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-11-12 16:25:22,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 1232 events. 433/1232 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8171 event pairs, 240 based on Foata normal form. 4/946 useless extension candidates. Maximal degree in co-relation 2205. Up to 485 conditions per place. [2024-11-12 16:25:22,390 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 83 selfloop transitions, 19 changer transitions 22/145 dead transitions. [2024-11-12 16:25:22,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 145 transitions, 1196 flow [2024-11-12 16:25:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:25:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:25:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 266 transitions. [2024-11-12 16:25:22,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6717171717171717 [2024-11-12 16:25:22,392 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 722 flow. Second operand 6 states and 266 transitions. [2024-11-12 16:25:22,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 145 transitions, 1196 flow [2024-11-12 16:25:22,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 145 transitions, 971 flow, removed 20 selfloop flow, removed 19 redundant places. [2024-11-12 16:25:22,402 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 570 flow [2024-11-12 16:25:22,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2024-11-12 16:25:22,403 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 45 predicate places. [2024-11-12 16:25:22,403 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 570 flow [2024-11-12 16:25:22,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:22,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:22,404 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:22,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:25:22,607 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,SelfDestructingSolverStorable15 [2024-11-12 16:25:22,608 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:22,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:22,608 INFO L85 PathProgramCache]: Analyzing trace with hash 546387683, now seen corresponding path program 1 times [2024-11-12 16:25:22,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:22,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559988378] [2024-11-12 16:25:22,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:22,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:25:23,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:23,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559988378] [2024-11-12 16:25:23,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559988378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:23,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870877350] [2024-11-12 16:25:23,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:23,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:23,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:23,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:23,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:25:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:23,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 16:25:23,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:23,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:25:23,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:23,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:25:23,259 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-12 16:25:23,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-12 16:25:23,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:23,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:25:23,317 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:25:23,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:25:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:25:23,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:23,692 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 162 treesize of output 156 [2024-11-12 16:25:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:25:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870877350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:23,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:23,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-12 16:25:23,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013755886] [2024-11-12 16:25:23,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:23,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 16:25:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 16:25:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-12 16:25:25,454 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-12 16:25:25,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 570 flow. Second operand has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:25,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:25,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-12 16:25:25,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:26,141 INFO L124 PetriNetUnfolderBase]: 675/1618 cut-off events. [2024-11-12 16:25:26,141 INFO L125 PetriNetUnfolderBase]: For 477/525 co-relation queries the response was YES. [2024-11-12 16:25:26,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3641 conditions, 1618 events. 675/1618 cut-off events. For 477/525 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10687 event pairs, 282 based on Foata normal form. 0/1391 useless extension candidates. Maximal degree in co-relation 3169. Up to 562 conditions per place. [2024-11-12 16:25:26,148 INFO L140 encePairwiseOnDemand]: 51/66 looper letters, 92 selfloop transitions, 42 changer transitions 0/151 dead transitions. [2024-11-12 16:25:26,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 151 transitions, 987 flow [2024-11-12 16:25:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:25:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:25:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 336 transitions. [2024-11-12 16:25:26,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-11-12 16:25:26,151 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 570 flow. Second operand 9 states and 336 transitions. [2024-11-12 16:25:26,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 151 transitions, 987 flow [2024-11-12 16:25:26,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 983 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-12 16:25:26,156 INFO L231 Difference]: Finished difference. Result has 118 places, 109 transitions, 702 flow [2024-11-12 16:25:26,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=702, PETRI_PLACES=118, PETRI_TRANSITIONS=109} [2024-11-12 16:25:26,157 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 55 predicate places. [2024-11-12 16:25:26,157 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 109 transitions, 702 flow [2024-11-12 16:25:26,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:26,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:26,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:26,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 16:25:26,357 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,SelfDestructingSolverStorable16 [2024-11-12 16:25:26,358 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:26,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2037437473, now seen corresponding path program 1 times [2024-11-12 16:25:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:26,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578695166] [2024-11-12 16:25:26,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:25:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578695166] [2024-11-12 16:25:26,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578695166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642955539] [2024-11-12 16:25:26,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:26,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:26,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:26,484 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:26,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:25:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:26,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:25:26,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:25:26,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:26,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-12 16:25:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:25:26,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642955539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:26,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-12 16:25:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410042504] [2024-11-12 16:25:26,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:26,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 16:25:26,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 16:25:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:25:27,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-12 16:25:27,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 109 transitions, 702 flow. Second operand has 9 states, 9 states have (on average 35.44444444444444) internal successors, (319), 9 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:27,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:27,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-12 16:25:27,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:27,708 INFO L124 PetriNetUnfolderBase]: 1706/3947 cut-off events. [2024-11-12 16:25:27,708 INFO L125 PetriNetUnfolderBase]: For 4247/4851 co-relation queries the response was YES. [2024-11-12 16:25:27,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10439 conditions, 3947 events. 1706/3947 cut-off events. For 4247/4851 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 30351 event pairs, 532 based on Foata normal form. 16/3505 useless extension candidates. Maximal degree in co-relation 9424. Up to 784 conditions per place. [2024-11-12 16:25:27,741 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 147 selfloop transitions, 32 changer transitions 0/198 dead transitions. [2024-11-12 16:25:27,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 198 transitions, 1521 flow [2024-11-12 16:25:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:25:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:25:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 480 transitions. [2024-11-12 16:25:27,744 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-12 16:25:27,745 INFO L175 Difference]: Start difference. First operand has 118 places, 109 transitions, 702 flow. Second operand 12 states and 480 transitions. [2024-11-12 16:25:27,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 198 transitions, 1521 flow [2024-11-12 16:25:27,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 198 transitions, 1437 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-11-12 16:25:27,756 INFO L231 Difference]: Finished difference. Result has 132 places, 126 transitions, 855 flow [2024-11-12 16:25:27,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=855, PETRI_PLACES=132, PETRI_TRANSITIONS=126} [2024-11-12 16:25:27,757 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 69 predicate places. [2024-11-12 16:25:27,757 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 126 transitions, 855 flow [2024-11-12 16:25:27,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.44444444444444) internal successors, (319), 9 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:27,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:27,758 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:27,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 16:25:27,958 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,SelfDestructingSolverStorable17 [2024-11-12 16:25:27,958 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:27,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash -241850326, now seen corresponding path program 1 times [2024-11-12 16:25:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:27,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340094753] [2024-11-12 16:25:27,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:27,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:25:28,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:28,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340094753] [2024-11-12 16:25:28,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340094753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:28,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750411779] [2024-11-12 16:25:28,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:28,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:28,222 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:28,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:25:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:28,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 16:25:28,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:28,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:25:28,359 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:25:28,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-12 16:25:28,391 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:25:28,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-12 16:25:28,419 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-12 16:25:28,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2024-11-12 16:25:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:25:28,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:25:28,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750411779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:28,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:28,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2024-11-12 16:25:28,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102611220] [2024-11-12 16:25:28,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:28,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:25:28,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:25:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:25:29,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 66 [2024-11-12 16:25:29,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 126 transitions, 855 flow. Second operand has 12 states, 12 states have (on average 22.5) internal successors, (270), 12 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:29,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:29,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 66 [2024-11-12 16:25:29,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:29,554 INFO L124 PetriNetUnfolderBase]: 2382/4949 cut-off events. [2024-11-12 16:25:29,554 INFO L125 PetriNetUnfolderBase]: For 6483/6803 co-relation queries the response was YES. [2024-11-12 16:25:29,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15281 conditions, 4949 events. 2382/4949 cut-off events. For 6483/6803 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 36069 event pairs, 1548 based on Foata normal form. 304/5071 useless extension candidates. Maximal degree in co-relation 13375. Up to 3808 conditions per place. [2024-11-12 16:25:29,580 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 79 selfloop transitions, 32 changer transitions 0/124 dead transitions. [2024-11-12 16:25:29,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 124 transitions, 1073 flow [2024-11-12 16:25:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:25:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:25:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-11-12 16:25:29,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41515151515151516 [2024-11-12 16:25:29,581 INFO L175 Difference]: Start difference. First operand has 132 places, 126 transitions, 855 flow. Second operand 5 states and 137 transitions. [2024-11-12 16:25:29,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 124 transitions, 1073 flow [2024-11-12 16:25:29,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 124 transitions, 1035 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:25:29,601 INFO L231 Difference]: Finished difference. Result has 130 places, 124 transitions, 877 flow [2024-11-12 16:25:29,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=877, PETRI_PLACES=130, PETRI_TRANSITIONS=124} [2024-11-12 16:25:29,601 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 67 predicate places. [2024-11-12 16:25:29,601 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 124 transitions, 877 flow [2024-11-12 16:25:29,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.5) internal successors, (270), 12 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:29,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:29,602 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:29,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 16:25:29,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:29,803 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:29,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash -241850325, now seen corresponding path program 1 times [2024-11-12 16:25:29,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:29,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812380037] [2024-11-12 16:25:29,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:29,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:25:30,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:30,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812380037] [2024-11-12 16:25:30,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812380037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:30,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692452110] [2024-11-12 16:25:30,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:30,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:30,291 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:30,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 16:25:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:30,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-12 16:25:30,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:30,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:25:30,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:25:30,511 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-12 16:25:30,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-12 16:25:30,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-12 16:25:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:30,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2024-11-12 16:25:30,778 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-12 16:25:30,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2024-11-12 16:25:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:30,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2024-11-12 16:25:30,892 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-12 16:25:30,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-12 16:25:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:25:31,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:25:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692452110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:31,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:25:31,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 17 [2024-11-12 16:25:31,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890779457] [2024-11-12 16:25:31,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:31,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:25:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:31,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:25:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:25:34,008 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-11-12 16:25:34,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 124 transitions, 877 flow. Second operand has 19 states, 19 states have (on average 27.210526315789473) internal successors, (517), 19 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:34,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:34,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-11-12 16:25:34,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:36,193 INFO L124 PetriNetUnfolderBase]: 1634/3843 cut-off events. [2024-11-12 16:25:36,193 INFO L125 PetriNetUnfolderBase]: For 3908/4306 co-relation queries the response was YES. [2024-11-12 16:25:36,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11500 conditions, 3843 events. 1634/3843 cut-off events. For 3908/4306 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 29275 event pairs, 702 based on Foata normal form. 176/3695 useless extension candidates. Maximal degree in co-relation 10372. Up to 1624 conditions per place. [2024-11-12 16:25:36,247 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 150 selfloop transitions, 47 changer transitions 0/217 dead transitions. [2024-11-12 16:25:36,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 217 transitions, 1745 flow [2024-11-12 16:25:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 16:25:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 16:25:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 533 transitions. [2024-11-12 16:25:36,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4750445632798574 [2024-11-12 16:25:36,250 INFO L175 Difference]: Start difference. First operand has 130 places, 124 transitions, 877 flow. Second operand 17 states and 533 transitions. [2024-11-12 16:25:36,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 217 transitions, 1745 flow [2024-11-12 16:25:36,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 217 transitions, 1681 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:25:36,268 INFO L231 Difference]: Finished difference. Result has 145 places, 126 transitions, 936 flow [2024-11-12 16:25:36,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=936, PETRI_PLACES=145, PETRI_TRANSITIONS=126} [2024-11-12 16:25:36,269 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 82 predicate places. [2024-11-12 16:25:36,270 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 126 transitions, 936 flow [2024-11-12 16:25:36,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.210526315789473) internal successors, (517), 19 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:36,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:36,270 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:36,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 16:25:36,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-12 16:25:36,471 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:36,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1263948475, now seen corresponding path program 1 times [2024-11-12 16:25:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:36,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312556338] [2024-11-12 16:25:36,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:36,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-12 16:25:36,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342774735] [2024-11-12 16:25:36,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:36,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:36,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:36,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:36,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 16:25:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:36,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-12 16:25:36,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:36,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:25:36,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:25:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:25:36,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:25:36,753 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:25:36,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:25:36,801 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:25:36,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-12 16:25:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:25:37,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:25:37,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:37,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312556338] [2024-11-12 16:25:37,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-12 16:25:37,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342774735] [2024-11-12 16:25:37,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342774735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:25:37,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:25:37,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2024-11-12 16:25:37,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731547907] [2024-11-12 16:25:37,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-12 16:25:37,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 16:25:37,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:37,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 16:25:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-12 16:25:39,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-12 16:25:39,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 126 transitions, 936 flow. Second operand has 17 states, 17 states have (on average 29.88235294117647) internal successors, (508), 17 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:39,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:39,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-12 16:25:39,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:25:41,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-12 16:25:44,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-12 16:25:45,922 INFO L124 PetriNetUnfolderBase]: 2899/5635 cut-off events. [2024-11-12 16:25:45,922 INFO L125 PetriNetUnfolderBase]: For 11805/12275 co-relation queries the response was YES. [2024-11-12 16:25:45,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19396 conditions, 5635 events. 2899/5635 cut-off events. For 11805/12275 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 39581 event pairs, 1688 based on Foata normal form. 20/5334 useless extension candidates. Maximal degree in co-relation 17608. Up to 2884 conditions per place. [2024-11-12 16:25:45,953 INFO L140 encePairwiseOnDemand]: 45/66 looper letters, 119 selfloop transitions, 68 changer transitions 8/212 dead transitions. [2024-11-12 16:25:45,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 212 transitions, 1781 flow [2024-11-12 16:25:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 16:25:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 16:25:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 650 transitions. [2024-11-12 16:25:45,955 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.518341307814992 [2024-11-12 16:25:45,955 INFO L175 Difference]: Start difference. First operand has 145 places, 126 transitions, 936 flow. Second operand 19 states and 650 transitions. [2024-11-12 16:25:45,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 212 transitions, 1781 flow [2024-11-12 16:25:45,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 212 transitions, 1651 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-12 16:25:45,985 INFO L231 Difference]: Finished difference. Result has 156 places, 141 transitions, 1165 flow [2024-11-12 16:25:45,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1165, PETRI_PLACES=156, PETRI_TRANSITIONS=141} [2024-11-12 16:25:45,986 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 93 predicate places. [2024-11-12 16:25:45,986 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 141 transitions, 1165 flow [2024-11-12 16:25:45,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.88235294117647) internal successors, (508), 17 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:45,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:25:45,987 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:25:46,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 16:25:46,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:46,188 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:25:46,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:25:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash 527723548, now seen corresponding path program 1 times [2024-11-12 16:25:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:25:46,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284257751] [2024-11-12 16:25:46,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:46,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:25:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:25:46,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:25:46,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284257751] [2024-11-12 16:25:46,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284257751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:46,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843221064] [2024-11-12 16:25:46,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:25:46,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:25:46,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:25:46,315 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:25:46,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 16:25:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:25:46,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:25:46,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:25:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:25:46,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:25:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:25:46,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843221064] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:25:46,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:25:46,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2024-11-12 16:25:46,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643726472] [2024-11-12 16:25:46,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:25:46,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:25:46,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:25:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:25:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-12 16:25:46,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-12 16:25:46,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 141 transitions, 1165 flow. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:25:46,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:25:46,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-12 16:25:46,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand