./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-3.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 d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:53:49,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:53:49,062 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:53:49,066 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:53:49,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:53:49,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:53:49,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:53:49,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:53:49,086 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:53:49,086 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:53:49,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:53:49,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:53:49,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:53:49,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:53:49,087 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:53:49,088 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:53:49,088 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:53:49,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:53:49,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:53:49,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:53:49,090 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:53:49,093 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:53:49,093 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:53:49,094 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:53:49,094 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:53:49,094 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:53:49,094 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:53:49,095 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:53:49,095 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:53:49,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:53:49,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:53:49,096 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:53:49,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:53:49,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:53:49,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:53:49,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:53:49,097 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:53:49,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:53:49,101 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:53:49,101 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:53:49,101 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:53:49,102 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:53:49,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2024-11-19 09:53:49,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:53:49,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:53:49,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:53:49,428 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:53:49,429 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:53:49,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2024-11-19 09:53:51,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:53:51,195 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:53:51,195 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2024-11-19 09:53:51,203 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6192482f9/1fc30f51bd454a42aae7400143363059/FLAG7cd103235 [2024-11-19 09:53:51,590 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6192482f9/1fc30f51bd454a42aae7400143363059 [2024-11-19 09:53:51,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:53:51,594 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:53:51,603 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:53:51,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:53:51,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:53:51,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:51,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea4a481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51, skipping insertion in model container [2024-11-19 09:53:51,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:51,635 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:53:51,827 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:53:51,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:53:51,839 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:53:51,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:53:51,894 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:53:51,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51 WrapperNode [2024-11-19 09:53:51,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:53:51,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:53:51,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:53:51,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:53:51,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:51,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:51,978 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 241 [2024-11-19 09:53:51,979 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:53:51,979 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:53:51,979 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:53:51,979 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:53:51,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:51,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:51,991 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:52,034 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-19 09:53:52,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:52,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:52,048 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:52,055 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:52,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:52,059 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:52,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:53:52,066 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:53:52,066 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:53:52,066 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:53:52,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (1/1) ... [2024-11-19 09:53:52,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:53:52,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:52,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:53:52,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:53:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:53:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:53:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:53:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:53:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:53:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:53:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:53:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:53:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:53:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:53:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:53:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:53:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:53:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:53:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:53:52,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:53:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:53:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:53:52,187 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:53:52,298 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:53:52,300 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:53:52,687 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:53:52,687 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:53:52,931 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:53:52,932 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-19 09:53:52,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:53:52 BoogieIcfgContainer [2024-11-19 09:53:52,932 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:53:52,934 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:53:52,934 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:53:52,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:53:52,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:53:51" (1/3) ... [2024-11-19 09:53:52,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ab3e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:53:52, skipping insertion in model container [2024-11-19 09:53:52,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:51" (2/3) ... [2024-11-19 09:53:52,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ab3e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:53:52, skipping insertion in model container [2024-11-19 09:53:52,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:53:52" (3/3) ... [2024-11-19 09:53:52,939 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-11-19 09:53:52,953 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:53:52,953 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-19 09:53:52,953 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:53:53,015 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:53:53,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 62 transitions, 145 flow [2024-11-19 09:53:53,078 INFO L124 PetriNetUnfolderBase]: 7/59 cut-off events. [2024-11-19 09:53:53,078 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:53:53,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 59 events. 7/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 158 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-11-19 09:53:53,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 62 transitions, 145 flow [2024-11-19 09:53:53,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 58 transitions, 134 flow [2024-11-19 09:53:53,095 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:53:53,101 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;@13d45f5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:53:53,101 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-11-19 09:53:53,104 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:53:53,104 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:53:53,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:53:53,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:53,105 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:53:53,106 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:53,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:53,110 INFO L85 PathProgramCache]: Analyzing trace with hash 740948, now seen corresponding path program 1 times [2024-11-19 09:53:53,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:53,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425044204] [2024-11-19 09:53:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:53,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:53,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:53,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425044204] [2024-11-19 09:53:53,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425044204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:53,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:53,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:53:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757263081] [2024-11-19 09:53:53,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:53,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:53:53,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:53:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:53:53,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-19 09:53:53,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:53,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:53,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-19 09:53:53,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:53,996 INFO L124 PetriNetUnfolderBase]: 3101/5041 cut-off events. [2024-11-19 09:53:53,996 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2024-11-19 09:53:54,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9517 conditions, 5041 events. 3101/5041 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33100 event pairs, 2731 based on Foata normal form. 337/3515 useless extension candidates. Maximal degree in co-relation 9110. Up to 4203 conditions per place. [2024-11-19 09:53:54,036 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 38 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-19 09:53:54,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 52 transitions, 202 flow [2024-11-19 09:53:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:53:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:53:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-19 09:53:54,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-19 09:53:54,048 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 134 flow. Second operand 3 states and 93 transitions. [2024-11-19 09:53:54,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 52 transitions, 202 flow [2024-11-19 09:53:54,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:53:54,060 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 114 flow [2024-11-19 09:53:54,064 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-11-19 09:53:54,072 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-11-19 09:53:54,072 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 114 flow [2024-11-19 09:53:54,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:54,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:54,072 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:53:54,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:53:54,073 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:54,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash 740949, now seen corresponding path program 1 times [2024-11-19 09:53:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:54,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339960411] [2024-11-19 09:53:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:54,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:54,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339960411] [2024-11-19 09:53:54,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339960411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:54,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:54,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:53:54,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7793528] [2024-11-19 09:53:54,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:54,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:53:54,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:54,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:53:54,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:53:54,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-19 09:53:54,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:54,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:54,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-19 09:53:54,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:54,790 INFO L124 PetriNetUnfolderBase]: 3101/5040 cut-off events. [2024-11-19 09:53:54,791 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-19 09:53:54,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 5040 events. 3101/5040 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33103 event pairs, 2731 based on Foata normal form. 0/3177 useless extension candidates. Maximal degree in co-relation 9334. Up to 4207 conditions per place. [2024-11-19 09:53:54,815 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 37 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-11-19 09:53:54,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 194 flow [2024-11-19 09:53:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:53:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:53:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-19 09:53:54,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-11-19 09:53:54,817 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 114 flow. Second operand 4 states and 106 transitions. [2024-11-19 09:53:54,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 194 flow [2024-11-19 09:53:54,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:54,819 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 116 flow [2024-11-19 09:53:54,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-19 09:53:54,820 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-11-19 09:53:54,820 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 116 flow [2024-11-19 09:53:54,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:54,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:54,821 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:53:54,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:53:54,821 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:54,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:54,822 INFO L85 PathProgramCache]: Analyzing trace with hash 22969954, now seen corresponding path program 1 times [2024-11-19 09:53:54,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:54,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498386793] [2024-11-19 09:53:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:55,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:55,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498386793] [2024-11-19 09:53:55,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498386793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:55,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:55,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:53:55,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63075112] [2024-11-19 09:53:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:55,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:53:55,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:53:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:53:55,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-19 09:53:55,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:55,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:55,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-19 09:53:55,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:55,415 INFO L124 PetriNetUnfolderBase]: 3103/5046 cut-off events. [2024-11-19 09:53:55,415 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-19 09:53:55,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9372 conditions, 5046 events. 3103/5046 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33149 event pairs, 2731 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 9348. Up to 4210 conditions per place. [2024-11-19 09:53:55,446 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 40 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-11-19 09:53:55,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 57 transitions, 228 flow [2024-11-19 09:53:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:53:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:53:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-19 09:53:55,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-11-19 09:53:55,449 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 116 flow. Second operand 5 states and 128 transitions. [2024-11-19 09:53:55,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 57 transitions, 228 flow [2024-11-19 09:53:55,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:53:55,450 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 161 flow [2024-11-19 09:53:55,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-11-19 09:53:55,453 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-19 09:53:55,453 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 161 flow [2024-11-19 09:53:55,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:55,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:55,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:53:55,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:53:55,453 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:55,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:55,454 INFO L85 PathProgramCache]: Analyzing trace with hash 599312510, now seen corresponding path program 1 times [2024-11-19 09:53:55,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:55,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652732852] [2024-11-19 09:53:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:55,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:55,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:55,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652732852] [2024-11-19 09:53:55,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652732852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:55,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060955198] [2024-11-19 09:53:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:55,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:55,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:55,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:53:55,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:53:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:55,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:53:55,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:55,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:53:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:56,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:56,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060955198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:56,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:56,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:53:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055427790] [2024-11-19 09:53:56,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:56,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:53:56,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:56,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:53:56,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:53:56,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-19 09:53:56,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 161 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:56,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:56,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-19 09:53:56,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:56,831 INFO L124 PetriNetUnfolderBase]: 3103/5045 cut-off events. [2024-11-19 09:53:56,832 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-19 09:53:56,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9385 conditions, 5045 events. 3103/5045 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33088 event pairs, 2731 based on Foata normal form. 0/3183 useless extension candidates. Maximal degree in co-relation 9344. Up to 4203 conditions per place. [2024-11-19 09:53:56,856 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 34 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-11-19 09:53:56,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 249 flow [2024-11-19 09:53:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:53:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:53:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-11-19 09:53:56,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3663594470046083 [2024-11-19 09:53:56,858 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 161 flow. Second operand 7 states and 159 transitions. [2024-11-19 09:53:56,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 249 flow [2024-11-19 09:53:56,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:53:56,860 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 180 flow [2024-11-19 09:53:56,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-11-19 09:53:56,861 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-19 09:53:56,861 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 180 flow [2024-11-19 09:53:56,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:56,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:56,862 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:56,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:53:57,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:57,066 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:57,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:57,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1402594028, now seen corresponding path program 1 times [2024-11-19 09:53:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:57,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956921592] [2024-11-19 09:53:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:57,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:57,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956921592] [2024-11-19 09:53:57,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956921592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:57,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:57,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:53:57,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028801618] [2024-11-19 09:53:57,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:57,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:53:57,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:57,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:53:57,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:53:57,133 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-19 09:53:57,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:57,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:57,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-19 09:53:57,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:57,534 INFO L124 PetriNetUnfolderBase]: 3243/5320 cut-off events. [2024-11-19 09:53:57,534 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-19 09:53:57,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9920 conditions, 5320 events. 3243/5320 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34862 event pairs, 2858 based on Foata normal form. 98/3590 useless extension candidates. Maximal degree in co-relation 9348. Up to 4212 conditions per place. [2024-11-19 09:53:57,560 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 58 selfloop transitions, 7 changer transitions 1/76 dead transitions. [2024-11-19 09:53:57,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 385 flow [2024-11-19 09:53:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:53:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:53:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-19 09:53:57,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5193548387096775 [2024-11-19 09:53:57,562 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 180 flow. Second operand 5 states and 161 transitions. [2024-11-19 09:53:57,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 385 flow [2024-11-19 09:53:57,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 336 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-19 09:53:57,565 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 214 flow [2024-11-19 09:53:57,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-19 09:53:57,566 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-19 09:53:57,566 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 214 flow [2024-11-19 09:53:57,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:57,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:57,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:57,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:53:57,567 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:57,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1861988887, now seen corresponding path program 1 times [2024-11-19 09:53:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:57,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448743221] [2024-11-19 09:53:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:57,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:57,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:57,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448743221] [2024-11-19 09:53:57,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448743221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:57,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:57,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:53:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372301044] [2024-11-19 09:53:57,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:57,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:53:57,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:53:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:53:57,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-19 09:53:57,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:57,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:57,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-19 09:53:57,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:57,927 INFO L124 PetriNetUnfolderBase]: 2352/3863 cut-off events. [2024-11-19 09:53:57,928 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2024-11-19 09:53:57,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 3863 events. 2352/3863 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23691 event pairs, 2053 based on Foata normal form. 0/2722 useless extension candidates. Maximal degree in co-relation 7380. Up to 3229 conditions per place. [2024-11-19 09:53:57,948 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 41 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-19 09:53:57,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 296 flow [2024-11-19 09:53:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:53:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:53:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-19 09:53:57,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-11-19 09:53:57,950 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 214 flow. Second operand 5 states and 120 transitions. [2024-11-19 09:53:57,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 296 flow [2024-11-19 09:53:57,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:53:57,954 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 210 flow [2024-11-19 09:53:57,955 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-11-19 09:53:57,955 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-19 09:53:57,956 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 210 flow [2024-11-19 09:53:57,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:57,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:57,957 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:57,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:53:57,959 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:57,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:57,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1861988888, now seen corresponding path program 1 times [2024-11-19 09:53:57,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:57,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327874811] [2024-11-19 09:53:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:57,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:58,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327874811] [2024-11-19 09:53:58,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327874811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37102564] [2024-11-19 09:53:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:58,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:58,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:58,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:53:58,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:53:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:58,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:53:58,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:58,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:53:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:53:58,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:53:58,261 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:53:58,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:53:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:58,282 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:53:58,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37102564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:58,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:53:58,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-19 09:53:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780069519] [2024-11-19 09:53:58,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:58,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:53:58,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:53:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:53:58,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-19 09:53:58,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:58,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:58,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-19 09:53:58,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:58,496 INFO L124 PetriNetUnfolderBase]: 1607/2665 cut-off events. [2024-11-19 09:53:58,496 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2024-11-19 09:53:58,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5295 conditions, 2665 events. 1607/2665 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14965 event pairs, 1376 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 4715. Up to 2230 conditions per place. [2024-11-19 09:53:58,506 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 41 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2024-11-19 09:53:58,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 286 flow [2024-11-19 09:53:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:53:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:53:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-19 09:53:58,508 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-11-19 09:53:58,508 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 210 flow. Second operand 4 states and 101 transitions. [2024-11-19 09:53:58,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 286 flow [2024-11-19 09:53:58,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 271 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:53:58,510 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 189 flow [2024-11-19 09:53:58,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-11-19 09:53:58,510 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-19 09:53:58,511 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 189 flow [2024-11-19 09:53:58,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:58,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:58,511 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:58,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:53:58,715 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,SelfDestructingSolverStorable6 [2024-11-19 09:53:58,716 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:58,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash 444143548, now seen corresponding path program 1 times [2024-11-19 09:53:58,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:58,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177501532] [2024-11-19 09:53:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:58,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:58,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:58,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177501532] [2024-11-19 09:53:58,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177501532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:58,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:58,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:53:58,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060873877] [2024-11-19 09:53:58,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:58,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:53:58,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:53:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:53:58,760 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-19 09:53:58,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:58,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:58,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-19 09:53:58,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:58,984 INFO L124 PetriNetUnfolderBase]: 1499/2491 cut-off events. [2024-11-19 09:53:58,985 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2024-11-19 09:53:58,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5120 conditions, 2491 events. 1499/2491 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13265 event pairs, 577 based on Foata normal form. 71/1987 useless extension candidates. Maximal degree in co-relation 4858. Up to 1517 conditions per place. [2024-11-19 09:53:58,996 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 52 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2024-11-19 09:53:58,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 345 flow [2024-11-19 09:53:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:53:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:53:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-19 09:53:58,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-11-19 09:53:58,998 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 189 flow. Second operand 3 states and 106 transitions. [2024-11-19 09:53:58,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 345 flow [2024-11-19 09:53:58,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:59,000 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 162 flow [2024-11-19 09:53:59,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-11-19 09:53:59,001 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2024-11-19 09:53:59,001 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 162 flow [2024-11-19 09:53:59,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:59,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:59,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:59,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:53:59,004 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:59,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash 697145832, now seen corresponding path program 1 times [2024-11-19 09:53:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:59,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478088957] [2024-11-19 09:53:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:59,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:59,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:59,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478088957] [2024-11-19 09:53:59,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478088957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:59,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:59,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:53:59,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926747755] [2024-11-19 09:53:59,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:59,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:53:59,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:53:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:53:59,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-19 09:53:59,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:59,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:59,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-19 09:53:59,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:59,289 INFO L124 PetriNetUnfolderBase]: 1318/2188 cut-off events. [2024-11-19 09:53:59,290 INFO L125 PetriNetUnfolderBase]: For 408/411 co-relation queries the response was YES. [2024-11-19 09:53:59,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4800 conditions, 2188 events. 1318/2188 cut-off events. For 408/411 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11003 event pairs, 527 based on Foata normal form. 15/1831 useless extension candidates. Maximal degree in co-relation 4773. Up to 1772 conditions per place. [2024-11-19 09:53:59,300 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 47 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2024-11-19 09:53:59,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 288 flow [2024-11-19 09:53:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:53:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:53:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-19 09:53:59,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-11-19 09:53:59,302 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 162 flow. Second operand 3 states and 99 transitions. [2024-11-19 09:53:59,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 288 flow [2024-11-19 09:53:59,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 278 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:59,305 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 175 flow [2024-11-19 09:53:59,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-11-19 09:53:59,307 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-19 09:53:59,307 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 175 flow [2024-11-19 09:53:59,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:59,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:59,307 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:59,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:53:59,308 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:59,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:59,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1765386403, now seen corresponding path program 1 times [2024-11-19 09:53:59,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:59,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625573885] [2024-11-19 09:53:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:59,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625573885] [2024-11-19 09:53:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625573885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:59,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:59,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:53:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987432013] [2024-11-19 09:53:59,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:59,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:53:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:59,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:53:59,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:53:59,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-19 09:53:59,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:59,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:59,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-19 09:53:59,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:59,607 INFO L124 PetriNetUnfolderBase]: 964/1685 cut-off events. [2024-11-19 09:53:59,608 INFO L125 PetriNetUnfolderBase]: For 869/869 co-relation queries the response was YES. [2024-11-19 09:53:59,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 1685 events. 964/1685 cut-off events. For 869/869 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8472 event pairs, 704 based on Foata normal form. 0/1513 useless extension candidates. Maximal degree in co-relation 3873. Up to 1366 conditions per place. [2024-11-19 09:53:59,620 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 37 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-11-19 09:53:59,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 249 flow [2024-11-19 09:53:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:53:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:53:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-19 09:53:59,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-11-19 09:53:59,622 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 175 flow. Second operand 4 states and 98 transitions. [2024-11-19 09:53:59,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 249 flow [2024-11-19 09:53:59,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 236 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:59,625 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 162 flow [2024-11-19 09:53:59,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-11-19 09:53:59,626 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-11-19 09:53:59,626 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 162 flow [2024-11-19 09:53:59,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:59,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:59,627 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:59,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:53:59,627 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:59,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1464885612, now seen corresponding path program 1 times [2024-11-19 09:53:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980974670] [2024-11-19 09:53:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:59,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980974670] [2024-11-19 09:53:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980974670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:59,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:59,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:53:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001476225] [2024-11-19 09:53:59,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:59,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:53:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:53:59,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:53:59,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-19 09:53:59,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:59,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:59,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-19 09:53:59,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:59,943 INFO L124 PetriNetUnfolderBase]: 1205/2131 cut-off events. [2024-11-19 09:53:59,943 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-11-19 09:53:59,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 2131 events. 1205/2131 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11110 event pairs, 906 based on Foata normal form. 64/2025 useless extension candidates. Maximal degree in co-relation 4540. Up to 1374 conditions per place. [2024-11-19 09:53:59,953 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 37 selfloop transitions, 2 changer transitions 19/68 dead transitions. [2024-11-19 09:53:59,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 328 flow [2024-11-19 09:53:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:53:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:53:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-11-19 09:53:59,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5040322580645161 [2024-11-19 09:53:59,955 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 162 flow. Second operand 4 states and 125 transitions. [2024-11-19 09:53:59,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 328 flow [2024-11-19 09:53:59,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:59,957 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 160 flow [2024-11-19 09:53:59,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-11-19 09:53:59,958 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2024-11-19 09:53:59,958 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 160 flow [2024-11-19 09:53:59,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:59,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:59,958 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:59,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:53:59,958 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:53:59,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash 962373648, now seen corresponding path program 1 times [2024-11-19 09:53:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622025011] [2024-11-19 09:53:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:59,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622025011] [2024-11-19 09:54:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622025011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:00,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:00,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:54:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816949146] [2024-11-19 09:54:00,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:00,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:54:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:54:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:54:00,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-19 09:54:00,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:00,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:00,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-19 09:54:00,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:00,272 INFO L124 PetriNetUnfolderBase]: 663/1231 cut-off events. [2024-11-19 09:54:00,273 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2024-11-19 09:54:00,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1231 events. 663/1231 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6188 event pairs, 474 based on Foata normal form. 86/1223 useless extension candidates. Maximal degree in co-relation 2593. Up to 945 conditions per place. [2024-11-19 09:54:00,277 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-19 09:54:00,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 226 flow [2024-11-19 09:54:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-19 09:54:00,278 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-11-19 09:54:00,279 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 160 flow. Second operand 4 states and 104 transitions. [2024-11-19 09:54:00,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 226 flow [2024-11-19 09:54:00,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 222 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:00,280 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 152 flow [2024-11-19 09:54:00,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-11-19 09:54:00,280 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-11-19 09:54:00,281 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 152 flow [2024-11-19 09:54:00,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:00,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:00,281 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:00,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:54:00,281 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:54:00,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:00,282 INFO L85 PathProgramCache]: Analyzing trace with hash 214930534, now seen corresponding path program 1 times [2024-11-19 09:54:00,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:00,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371364212] [2024-11-19 09:54:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:00,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:00,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:00,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371364212] [2024-11-19 09:54:00,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371364212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:00,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:00,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:54:00,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650682774] [2024-11-19 09:54:00,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:00,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:54:00,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:54:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:54:00,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-19 09:54:00,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:00,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:00,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-19 09:54:00,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:00,686 INFO L124 PetriNetUnfolderBase]: 1274/2136 cut-off events. [2024-11-19 09:54:00,686 INFO L125 PetriNetUnfolderBase]: For 548/564 co-relation queries the response was YES. [2024-11-19 09:54:00,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4759 conditions, 2136 events. 1274/2136 cut-off events. For 548/564 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11770 event pairs, 342 based on Foata normal form. 1/2086 useless extension candidates. Maximal degree in co-relation 4730. Up to 775 conditions per place. [2024-11-19 09:54:00,695 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 82 selfloop transitions, 9 changer transitions 10/109 dead transitions. [2024-11-19 09:54:00,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 527 flow [2024-11-19 09:54:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:54:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:54:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-11-19 09:54:00,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4495967741935484 [2024-11-19 09:54:00,696 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 152 flow. Second operand 8 states and 223 transitions. [2024-11-19 09:54:00,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 527 flow [2024-11-19 09:54:00,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 524 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:00,698 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 199 flow [2024-11-19 09:54:00,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-11-19 09:54:00,699 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2024-11-19 09:54:00,699 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 199 flow [2024-11-19 09:54:00,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:00,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:00,699 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:00,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:54:00,700 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:54:00,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash -928937351, now seen corresponding path program 1 times [2024-11-19 09:54:00,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:00,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075269926] [2024-11-19 09:54:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:00,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:00,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:00,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075269926] [2024-11-19 09:54:00,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075269926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:00,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037466495] [2024-11-19 09:54:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:00,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:00,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:00,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:54:00,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:54:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:00,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:54:00,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:00,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:01,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037466495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:01,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:01,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-19 09:54:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72572361] [2024-11-19 09:54:01,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:01,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:54:01,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:54:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:54:01,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-19 09:54:01,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 199 flow. Second operand has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:01,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:01,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-19 09:54:01,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:01,558 INFO L124 PetriNetUnfolderBase]: 1661/3295 cut-off events. [2024-11-19 09:54:01,558 INFO L125 PetriNetUnfolderBase]: For 1421/1423 co-relation queries the response was YES. [2024-11-19 09:54:01,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7666 conditions, 3295 events. 1661/3295 cut-off events. For 1421/1423 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21951 event pairs, 909 based on Foata normal form. 113/3257 useless extension candidates. Maximal degree in co-relation 7650. Up to 1488 conditions per place. [2024-11-19 09:54:01,572 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 68 selfloop transitions, 17 changer transitions 6/104 dead transitions. [2024-11-19 09:54:01,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 558 flow [2024-11-19 09:54:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:54:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:54:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-11-19 09:54:01,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-11-19 09:54:01,577 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 199 flow. Second operand 10 states and 262 transitions. [2024-11-19 09:54:01,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 558 flow [2024-11-19 09:54:01,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 551 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:01,580 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 318 flow [2024-11-19 09:54:01,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=318, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-11-19 09:54:01,580 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2024-11-19 09:54:01,581 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 318 flow [2024-11-19 09:54:01,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:01,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:01,581 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:01,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:54:01,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:01,786 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:54:01,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash 422238282, now seen corresponding path program 1 times [2024-11-19 09:54:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943140617] [2024-11-19 09:54:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:01,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:01,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943140617] [2024-11-19 09:54:01,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943140617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:01,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:01,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:54:01,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685996821] [2024-11-19 09:54:01,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:01,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:01,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:01,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-19 09:54:01,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:01,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:01,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-19 09:54:01,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:02,243 INFO L124 PetriNetUnfolderBase]: 2547/5190 cut-off events. [2024-11-19 09:54:02,244 INFO L125 PetriNetUnfolderBase]: For 4301/4459 co-relation queries the response was YES. [2024-11-19 09:54:02,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12647 conditions, 5190 events. 2547/5190 cut-off events. For 4301/4459 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 37434 event pairs, 732 based on Foata normal form. 132/5066 useless extension candidates. Maximal degree in co-relation 9774. Up to 1370 conditions per place. [2024-11-19 09:54:02,276 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 82 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2024-11-19 09:54:02,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 637 flow [2024-11-19 09:54:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-19 09:54:02,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-11-19 09:54:02,280 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 318 flow. Second operand 4 states and 138 transitions. [2024-11-19 09:54:02,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 637 flow [2024-11-19 09:54:02,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 101 transitions, 620 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:02,286 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 362 flow [2024-11-19 09:54:02,287 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=362, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2024-11-19 09:54:02,287 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 18 predicate places. [2024-11-19 09:54:02,287 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 362 flow [2024-11-19 09:54:02,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:02,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:02,288 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:02,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:54:02,288 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:54:02,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash 449455392, now seen corresponding path program 2 times [2024-11-19 09:54:02,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:02,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003384909] [2024-11-19 09:54:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:54:02,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:02,328 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:54:02,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:54:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:03,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:03,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003384909] [2024-11-19 09:54:03,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003384909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:03,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727540246] [2024-11-19 09:54:03,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:54:03,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:03,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:54:03,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:54:03,274 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:54:03,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:54:03,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:54:03,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:03,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:54:03,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-19 09:54:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:03,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:03,841 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:54:03,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-19 09:54:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:04,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727540246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:04,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:04,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2024-11-19 09:54:04,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542371566] [2024-11-19 09:54:04,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:04,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 09:54:04,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 09:54:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-11-19 09:54:04,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 62 [2024-11-19 09:54:04,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 362 flow. Second operand has 29 states, 29 states have (on average 16.344827586206897) internal successors, (474), 29 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:04,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:04,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 62 [2024-11-19 09:54:04,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:22,988 INFO L124 PetriNetUnfolderBase]: 62198/100015 cut-off events. [2024-11-19 09:54:22,989 INFO L125 PetriNetUnfolderBase]: For 112809/112809 co-relation queries the response was YES. [2024-11-19 09:54:23,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273888 conditions, 100015 events. 62198/100015 cut-off events. For 112809/112809 co-relation queries the response was YES. Maximal size of possible extension queue 2497. Compared 822160 event pairs, 3830 based on Foata normal form. 2199/100136 useless extension candidates. Maximal degree in co-relation 243447. Up to 14152 conditions per place. [2024-11-19 09:54:23,645 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 1398 selfloop transitions, 458 changer transitions 25/1886 dead transitions. [2024-11-19 09:54:23,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1886 transitions, 11805 flow [2024-11-19 09:54:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2024-11-19 09:54:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2024-11-19 09:54:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 3244 transitions. [2024-11-19 09:54:23,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4360215053763441 [2024-11-19 09:54:23,654 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 362 flow. Second operand 120 states and 3244 transitions. [2024-11-19 09:54:23,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1886 transitions, 11805 flow [2024-11-19 09:54:23,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 1886 transitions, 11577 flow, removed 114 selfloop flow, removed 0 redundant places. [2024-11-19 09:54:23,697 INFO L231 Difference]: Finished difference. Result has 290 places, 698 transitions, 6564 flow [2024-11-19 09:54:23,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=6564, PETRI_PLACES=290, PETRI_TRANSITIONS=698} [2024-11-19 09:54:23,698 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 229 predicate places. [2024-11-19 09:54:23,698 INFO L471 AbstractCegarLoop]: Abstraction has has 290 places, 698 transitions, 6564 flow [2024-11-19 09:54:23,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 16.344827586206897) internal successors, (474), 29 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:23,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:23,699 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:23,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:54:23,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 09:54:23,904 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:54:23,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1300257764, now seen corresponding path program 3 times [2024-11-19 09:54:23,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:23,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279134467] [2024-11-19 09:54:23,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:54:23,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:23,926 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:54:23,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:54:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:54:24,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279134467] [2024-11-19 09:54:24,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279134467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528928782] [2024-11-19 09:54:24,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:54:24,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:24,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:24,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:54:24,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:54:24,250 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:54:24,250 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:54:24,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:54:24,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:54:24,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:24,325 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:54:24,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-19 09:54:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:54:24,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528928782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:24,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:24,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2024-11-19 09:54:24,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126060134] [2024-11-19 09:54:24,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:24,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:54:24,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:24,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:54:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:54:24,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-19 09:54:24,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 698 transitions, 6564 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 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) [2024-11-19 09:54:24,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:24,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-19 09:54:24,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:46,033 INFO L124 PetriNetUnfolderBase]: 53355/89990 cut-off events. [2024-11-19 09:54:46,033 INFO L125 PetriNetUnfolderBase]: For 4566697/4574867 co-relation queries the response was YES. [2024-11-19 09:54:47,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521264 conditions, 89990 events. 53355/89990 cut-off events. For 4566697/4574867 co-relation queries the response was YES. Maximal size of possible extension queue 2540. Compared 786867 event pairs, 9480 based on Foata normal form. 643/89922 useless extension candidates. Maximal degree in co-relation 465379. Up to 54480 conditions per place. [2024-11-19 09:54:48,562 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 713 selfloop transitions, 110 changer transitions 0/924 dead transitions. [2024-11-19 09:54:48,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 924 transitions, 10243 flow [2024-11-19 09:54:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:54:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:54:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-11-19 09:54:48,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2024-11-19 09:54:48,564 INFO L175 Difference]: Start difference. First operand has 290 places, 698 transitions, 6564 flow. Second operand 6 states and 178 transitions. [2024-11-19 09:54:48,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 924 transitions, 10243 flow [2024-11-19 09:55:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 924 transitions, 8176 flow, removed 1031 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:11,455 INFO L231 Difference]: Finished difference. Result has 292 places, 721 transitions, 5701 flow [2024-11-19 09:55:11,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5701, PETRI_PLACES=292, PETRI_TRANSITIONS=721} [2024-11-19 09:55:11,456 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 231 predicate places. [2024-11-19 09:55:11,456 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 721 transitions, 5701 flow [2024-11-19 09:55:11,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 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) [2024-11-19 09:55:11,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:11,457 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:11,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:55:11,657 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,SelfDestructingSolverStorable16 [2024-11-19 09:55:11,658 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-19 09:55:11,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash 439278090, now seen corresponding path program 1 times [2024-11-19 09:55:11,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:11,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142516931] [2024-11-19 09:55:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:55:11,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:11,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142516931] [2024-11-19 09:55:11,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142516931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:11,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:11,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:55:11,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470746115] [2024-11-19 09:55:11,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:11,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:55:11,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:55:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:55:11,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-19 09:55:11,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 721 transitions, 5701 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:11,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:11,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-19 09:55:11,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand