./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-mts.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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:53:52,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:53:52,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:53:52,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:53:52,937 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:53:52,970 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:53:52,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:53:52,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:53:52,973 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:53:52,974 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:53:52,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:53:52,975 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:53:52,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:53:52,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:53:52,978 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:53:52,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:53:52,979 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:53:52,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:53:52,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:53:52,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:53:52,980 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:53:52,984 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:53:52,985 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:53:52,985 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:53:52,985 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:53:52,985 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:53:52,985 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:53:52,986 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:53:52,986 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:53:52,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:53:52,986 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:53:52,986 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:53:52,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:53:52,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:53:52,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:53:52,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:53:52,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:53:52,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:53:52,988 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:53:52,989 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:53:52,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:53:52,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:53:52,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2024-11-09 10:53:53,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:53:53,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:53:53,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:53:53,242 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:53:53,242 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:53:53,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-09 10:53:54,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:53:54,875 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:53:54,876 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-09 10:53:54,886 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca6627b6/36dca96d6f5943c19782e825415d7521/FLAG3afa4d235 [2024-11-09 10:53:54,900 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca6627b6/36dca96d6f5943c19782e825415d7521 [2024-11-09 10:53:54,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:53:54,903 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:53:54,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:53:54,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:53:54,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:53:54,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:53:54" (1/1) ... [2024-11-09 10:53:54,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3e48a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:54, skipping insertion in model container [2024-11-09 10:53:54,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:53:54" (1/1) ... [2024-11-09 10:53:54,930 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:53:55,130 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:53:55,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:53:55,142 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:53:55,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:53:55,183 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:53:55,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55 WrapperNode [2024-11-09 10:53:55,184 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:53:55,185 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:53:55,185 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:53:55,185 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:53:55,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,231 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 14, calls inlined = 20, statements flattened = 218 [2024-11-09 10:53:55,232 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:53:55,233 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:53:55,233 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:53:55,233 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:53:55,244 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,248 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,266 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 10:53:55,269 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,280 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,287 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,290 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:53:55,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:53:55,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:53:55,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:53:55,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (1/1) ... [2024-11-09 10:53:55,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:53:55,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:55,323 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) [2024-11-09 10:53:55,325 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 [2024-11-09 10:53:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:53:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:53:55,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:53:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:53:55,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:53:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:53:55,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:53:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:53:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:53:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:53:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:53:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:53:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:53:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:53:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:53:55,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:53:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:53:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:53:55,375 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:53:55,476 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:53:55,478 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:53:55,973 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:53:55,974 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:53:56,357 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:53:56,358 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:53:56,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:53:56 BoogieIcfgContainer [2024-11-09 10:53:56,359 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:53:56,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:53:56,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:53:56,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:53:56,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:53:54" (1/3) ... [2024-11-09 10:53:56,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4892b601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:53:56, skipping insertion in model container [2024-11-09 10:53:56,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:55" (2/3) ... [2024-11-09 10:53:56,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4892b601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:53:56, skipping insertion in model container [2024-11-09 10:53:56,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:53:56" (3/3) ... [2024-11-09 10:53:56,368 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2024-11-09 10:53:56,386 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:53:56,387 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-09 10:53:56,387 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:53:56,474 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:53:56,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 58 transitions, 137 flow [2024-11-09 10:53:56,546 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2024-11-09 10:53:56,547 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:53:56,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 55 events. 6/55 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 144 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-11-09 10:53:56,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 58 transitions, 137 flow [2024-11-09 10:53:56,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 54 transitions, 126 flow [2024-11-09 10:53:56,570 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:53:56,580 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;@7078a432, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:53:56,581 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-09 10:53:56,584 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:53:56,585 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:53:56,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:53:56,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:56,586 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:53:56,587 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:53:56,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash 725632, now seen corresponding path program 1 times [2024-11-09 10:53:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:56,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687115472] [2024-11-09 10:53:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:56,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687115472] [2024-11-09 10:53:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687115472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:56,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:56,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:53:56,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579884852] [2024-11-09 10:53:56,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:56,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:53:56,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:53:56,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:53:56,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:53:56,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:56,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:56,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:53:56,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:57,355 INFO L124 PetriNetUnfolderBase]: 1076/1573 cut-off events. [2024-11-09 10:53:57,371 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-11-09 10:53:57,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 1573 events. 1076/1573 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6768 event pairs, 723 based on Foata normal form. 1/1429 useless extension candidates. Maximal degree in co-relation 2878. Up to 1475 conditions per place. [2024-11-09 10:53:57,403 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 30 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-09 10:53:57,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 176 flow [2024-11-09 10:53:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:53:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:53:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-09 10:53:57,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2024-11-09 10:53:57,424 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 95 transitions. [2024-11-09 10:53:57,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 176 flow [2024-11-09 10:53:57,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:53:57,435 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 104 flow [2024-11-09 10:53:57,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2024-11-09 10:53:57,443 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2024-11-09 10:53:57,444 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 104 flow [2024-11-09 10:53:57,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:57,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:57,445 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:53:57,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:53:57,445 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:53:57,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:57,447 INFO L85 PathProgramCache]: Analyzing trace with hash 725633, now seen corresponding path program 1 times [2024-11-09 10:53:57,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:57,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870548463] [2024-11-09 10:53:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:57,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:57,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:57,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870548463] [2024-11-09 10:53:57,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870548463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:57,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:57,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:57,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953436797] [2024-11-09 10:53:57,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:57,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:57,815 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:53:57,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-09 10:53:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:57,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:53:57,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:58,090 INFO L124 PetriNetUnfolderBase]: 1077/1576 cut-off events. [2024-11-09 10:53:58,091 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-09 10:53:58,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3094 conditions, 1576 events. 1077/1576 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6764 event pairs, 723 based on Foata normal form. 0/1431 useless extension candidates. Maximal degree in co-relation 3072. Up to 1480 conditions per place. [2024-11-09 10:53:58,101 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 32 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-09 10:53:58,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 184 flow [2024-11-09 10:53:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-11-09 10:53:58,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4870689655172414 [2024-11-09 10:53:58,104 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 104 flow. Second operand 4 states and 113 transitions. [2024-11-09 10:53:58,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 184 flow [2024-11-09 10:53:58,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:58,107 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 127 flow [2024-11-09 10:53:58,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2024-11-09 10:53:58,108 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2024-11-09 10:53:58,108 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 127 flow [2024-11-09 10:53:58,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-09 10:53:58,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:58,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:53:58,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:53:58,109 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:53:58,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash 697356455, now seen corresponding path program 1 times [2024-11-09 10:53:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:58,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143044176] [2024-11-09 10:53:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:58,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:58,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143044176] [2024-11-09 10:53:58,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143044176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:58,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230397982] [2024-11-09 10:53:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:58,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:58,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:58,342 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) [2024-11-09 10:53:58,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:53:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:58,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:53:58,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:58,510 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 [2024-11-09 10:53:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:58,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:58,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230397982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:58,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:58,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:53:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098419243] [2024-11-09 10:53:58,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:58,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:53:58,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:53:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:53:58,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:53:58,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 127 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 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) [2024-11-09 10:53:58,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:58,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:53:58,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:59,382 INFO L124 PetriNetUnfolderBase]: 1078/1578 cut-off events. [2024-11-09 10:53:59,384 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-09 10:53:59,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3110 conditions, 1578 events. 1078/1578 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6767 event pairs, 723 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 3079. Up to 1477 conditions per place. [2024-11-09 10:53:59,394 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 28 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-11-09 10:53:59,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 211 flow [2024-11-09 10:53:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:53:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:53:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-09 10:53:59,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-11-09 10:53:59,397 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 127 flow. Second operand 8 states and 192 transitions. [2024-11-09 10:53:59,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 211 flow [2024-11-09 10:53:59,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:53:59,399 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 152 flow [2024-11-09 10:53:59,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-11-09 10:53:59,400 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-11-09 10:53:59,400 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 152 flow [2024-11-09 10:53:59,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 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) [2024-11-09 10:53:59,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:59,401 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:53:59,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:59,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:59,606 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:53:59,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:59,607 INFO L85 PathProgramCache]: Analyzing trace with hash 146355160, now seen corresponding path program 1 times [2024-11-09 10:53:59,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:59,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607007847] [2024-11-09 10:53:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:59,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607007847] [2024-11-09 10:53:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607007847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:59,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:59,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354265011] [2024-11-09 10:53:59,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:59,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:59,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2024-11-09 10:53:59,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2024-11-09 10:53:59,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:59,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2024-11-09 10:53:59,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:59,898 INFO L124 PetriNetUnfolderBase]: 921/1347 cut-off events. [2024-11-09 10:53:59,899 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-09 10:53:59,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2674 conditions, 1347 events. 921/1347 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5498 event pairs, 608 based on Foata normal form. 0/1275 useless extension candidates. Maximal degree in co-relation 2636. Up to 1263 conditions per place. [2024-11-09 10:53:59,907 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-09 10:53:59,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 216 flow [2024-11-09 10:53:59,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-09 10:53:59,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-11-09 10:53:59,909 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 152 flow. Second operand 4 states and 96 transitions. [2024-11-09 10:53:59,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 216 flow [2024-11-09 10:53:59,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 174 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-09 10:53:59,911 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 108 flow [2024-11-09 10:53:59,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2024-11-09 10:53:59,912 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-11-09 10:53:59,913 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 108 flow [2024-11-09 10:53:59,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2024-11-09 10:53:59,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:59,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:53:59,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:53:59,914 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:53:59,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash 146355161, now seen corresponding path program 1 times [2024-11-09 10:53:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:59,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328324826] [2024-11-09 10:53:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:59,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:59,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328324826] [2024-11-09 10:53:59,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328324826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:59,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:59,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643491185] [2024-11-09 10:53:59,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:59,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:53:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:53:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:53:59,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-11-09 10:53:59,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 108 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) [2024-11-09 10:53:59,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:59,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-11-09 10:53:59,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:00,162 INFO L124 PetriNetUnfolderBase]: 920/1346 cut-off events. [2024-11-09 10:54:00,162 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-09 10:54:00,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1346 events. 920/1346 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5513 event pairs, 608 based on Foata normal form. 1/1277 useless extension candidates. Maximal degree in co-relation 2628. Up to 1268 conditions per place. [2024-11-09 10:54:00,171 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 34 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-09 10:54:00,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 176 flow [2024-11-09 10:54:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:54:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:54:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-11-09 10:54:00,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-11-09 10:54:00,173 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 108 flow. Second operand 3 states and 94 transitions. [2024-11-09 10:54:00,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 176 flow [2024-11-09 10:54:00,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:00,175 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 104 flow [2024-11-09 10:54:00,175 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-09 10:54:00,176 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-11-09 10:54:00,176 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 104 flow [2024-11-09 10:54:00,176 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) [2024-11-09 10:54:00,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:00,176 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:00,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:54:00,177 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:00,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:00,177 INFO L85 PathProgramCache]: Analyzing trace with hash 193199091, now seen corresponding path program 1 times [2024-11-09 10:54:00,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:00,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636623100] [2024-11-09 10:54:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:00,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:00,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636623100] [2024-11-09 10:54:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636623100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:00,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437466395] [2024-11-09 10:54:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:00,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:00,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:00,337 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) [2024-11-09 10:54:00,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:54:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:00,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:54:00,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:00,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:00,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:54:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:00,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437466395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:00,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:00,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 10:54:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695504806] [2024-11-09 10:54:00,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:00,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:54:00,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:54:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:54:00,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-09 10:54:00,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 104 flow. Second operand has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 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) [2024-11-09 10:54:00,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:00,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-09 10:54:00,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:01,060 INFO L124 PetriNetUnfolderBase]: 1680/2529 cut-off events. [2024-11-09 10:54:01,061 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-09 10:54:01,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4868 conditions, 2529 events. 1680/2529 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12419 event pairs, 483 based on Foata normal form. 0/2360 useless extension candidates. Maximal degree in co-relation 4857. Up to 1041 conditions per place. [2024-11-09 10:54:01,076 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 65 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-11-09 10:54:01,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 82 transitions, 328 flow [2024-11-09 10:54:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:54:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:54:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-11-09 10:54:01,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49261083743842365 [2024-11-09 10:54:01,079 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 104 flow. Second operand 7 states and 200 transitions. [2024-11-09 10:54:01,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 82 transitions, 328 flow [2024-11-09 10:54:01,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 82 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:01,081 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 138 flow [2024-11-09 10:54:01,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=138, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-11-09 10:54:01,083 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2024-11-09 10:54:01,083 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 138 flow [2024-11-09 10:54:01,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 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) [2024-11-09 10:54:01,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:01,084 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:01,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:01,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 10:54:01,289 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:01,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash 974478481, now seen corresponding path program 1 times [2024-11-09 10:54:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214189705] [2024-11-09 10:54:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:01,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:01,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214189705] [2024-11-09 10:54:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214189705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:01,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835794333] [2024-11-09 10:54:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:01,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:01,398 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) [2024-11-09 10:54:01,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:54:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:01,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:54:01,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:01,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:01,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835794333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:01,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:01,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-09 10:54:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910445672] [2024-11-09 10:54:01,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:01,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:54:01,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:54:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:54:01,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:54:01,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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) [2024-11-09 10:54:01,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:01,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:54:01,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:02,201 INFO L124 PetriNetUnfolderBase]: 2559/3899 cut-off events. [2024-11-09 10:54:02,201 INFO L125 PetriNetUnfolderBase]: For 1568/1623 co-relation queries the response was YES. [2024-11-09 10:54:02,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8790 conditions, 3899 events. 2559/3899 cut-off events. For 1568/1623 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20169 event pairs, 1504 based on Foata normal form. 0/3620 useless extension candidates. Maximal degree in co-relation 6023. Up to 2430 conditions per place. [2024-11-09 10:54:02,231 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 76 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2024-11-09 10:54:02,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 446 flow [2024-11-09 10:54:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:54:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:54:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-11-09 10:54:02,232 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5147783251231527 [2024-11-09 10:54:02,232 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 138 flow. Second operand 7 states and 209 transitions. [2024-11-09 10:54:02,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 446 flow [2024-11-09 10:54:02,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:54:02,236 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 163 flow [2024-11-09 10:54:02,237 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-11-09 10:54:02,237 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2024-11-09 10:54:02,237 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 163 flow [2024-11-09 10:54:02,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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) [2024-11-09 10:54:02,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:02,238 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:02,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:02,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:02,439 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:02,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash -878016597, now seen corresponding path program 2 times [2024-11-09 10:54:02,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:02,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736169422] [2024-11-09 10:54:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:02,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:02,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:02,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736169422] [2024-11-09 10:54:02,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736169422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:02,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730354093] [2024-11-09 10:54:02,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:02,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:02,623 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) [2024-11-09 10:54:02,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:54:02,703 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:54:02,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:02,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:54:02,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:02,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:54:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:02,900 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:54:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730354093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:02,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:54:02,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-09 10:54:02,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831567030] [2024-11-09 10:54:02,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:02,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:54:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:54:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:54:02,978 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-09 10:54:02,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-11-09 10:54:02,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:02,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-09 10:54:02,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:03,664 INFO L124 PetriNetUnfolderBase]: 4429/6342 cut-off events. [2024-11-09 10:54:03,664 INFO L125 PetriNetUnfolderBase]: For 3105/3229 co-relation queries the response was YES. [2024-11-09 10:54:03,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 6342 events. 4429/6342 cut-off events. For 3105/3229 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 31580 event pairs, 1966 based on Foata normal form. 0/5671 useless extension candidates. Maximal degree in co-relation 12289. Up to 3995 conditions per place. [2024-11-09 10:54:03,716 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 77 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-09 10:54:03,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 471 flow [2024-11-09 10:54:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:54:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:54:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-11-09 10:54:03,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 10:54:03,718 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 163 flow. Second operand 6 states and 174 transitions. [2024-11-09 10:54:03,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 471 flow [2024-11-09 10:54:03,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:03,724 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 197 flow [2024-11-09 10:54:03,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-11-09 10:54:03,725 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2024-11-09 10:54:03,725 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 197 flow [2024-11-09 10:54:03,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-11-09 10:54:03,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:03,726 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:03,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:54:03,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:03,931 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:03,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash 140386399, now seen corresponding path program 1 times [2024-11-09 10:54:03,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:03,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259099924] [2024-11-09 10:54:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:04,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259099924] [2024-11-09 10:54:04,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259099924] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:04,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:04,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:54:04,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132375736] [2024-11-09 10:54:04,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:04,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:54:04,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:04,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:54:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:54:04,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-11-09 10:54:04,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:04,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:04,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-11-09 10:54:04,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:04,943 INFO L124 PetriNetUnfolderBase]: 4070/6291 cut-off events. [2024-11-09 10:54:04,943 INFO L125 PetriNetUnfolderBase]: For 5358/5571 co-relation queries the response was YES. [2024-11-09 10:54:04,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16202 conditions, 6291 events. 4070/6291 cut-off events. For 5358/5571 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 34773 event pairs, 1771 based on Foata normal form. 22/6098 useless extension candidates. Maximal degree in co-relation 11971. Up to 3722 conditions per place. [2024-11-09 10:54:04,991 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 60 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-11-09 10:54:04,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 436 flow [2024-11-09 10:54:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:54:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:54:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-11-09 10:54:04,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5137931034482759 [2024-11-09 10:54:04,993 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 197 flow. Second operand 5 states and 149 transitions. [2024-11-09 10:54:04,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 436 flow [2024-11-09 10:54:05,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 414 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-09 10:54:05,003 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 216 flow [2024-11-09 10:54:05,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-11-09 10:54:05,006 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2024-11-09 10:54:05,006 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 216 flow [2024-11-09 10:54:05,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:05,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:05,007 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:05,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:54:05,007 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:05,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:05,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1910108667, now seen corresponding path program 1 times [2024-11-09 10:54:05,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:05,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494927076] [2024-11-09 10:54:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:05,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:05,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494927076] [2024-11-09 10:54:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494927076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012716321] [2024-11-09 10:54:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:05,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:05,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:05,097 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) [2024-11-09 10:54:05,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:54:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:05,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:54:05,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:05,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:05,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012716321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:05,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:05,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:54:05,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269066106] [2024-11-09 10:54:05,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:05,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:54:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:54:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:54:05,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:54:05,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 216 flow. Second operand has 14 states, 14 states have (on average 21.142857142857142) internal successors, (296), 14 states have internal predecessors, (296), 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) [2024-11-09 10:54:05,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:05,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:54:05,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:06,012 INFO L124 PetriNetUnfolderBase]: 4550/6843 cut-off events. [2024-11-09 10:54:06,013 INFO L125 PetriNetUnfolderBase]: For 6628/6928 co-relation queries the response was YES. [2024-11-09 10:54:06,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18985 conditions, 6843 events. 4550/6843 cut-off events. For 6628/6928 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 36198 event pairs, 2603 based on Foata normal form. 176/6977 useless extension candidates. Maximal degree in co-relation 15177. Up to 4992 conditions per place. [2024-11-09 10:54:06,137 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 89 selfloop transitions, 10 changer transitions 0/108 dead transitions. [2024-11-09 10:54:06,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 108 transitions, 636 flow [2024-11-09 10:54:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-11-09 10:54:06,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5150862068965517 [2024-11-09 10:54:06,139 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 216 flow. Second operand 8 states and 239 transitions. [2024-11-09 10:54:06,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 108 transitions, 636 flow [2024-11-09 10:54:06,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 632 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:06,147 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 273 flow [2024-11-09 10:54:06,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=273, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-11-09 10:54:06,148 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-11-09 10:54:06,148 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 273 flow [2024-11-09 10:54:06,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.142857142857142) internal successors, (296), 14 states have internal predecessors, (296), 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) [2024-11-09 10:54:06,149 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:06,149 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:06,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:06,355 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,SelfDestructingSolverStorable9 [2024-11-09 10:54:06,356 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:06,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash -221200747, now seen corresponding path program 2 times [2024-11-09 10:54:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:06,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844010937] [2024-11-09 10:54:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:06,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:06,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:06,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844010937] [2024-11-09 10:54:06,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844010937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:06,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208964049] [2024-11-09 10:54:06,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:06,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:06,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:06,604 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:06,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:54:06,685 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:06,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:06,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:54:06,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:06,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:06,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 10:54:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:06,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208964049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:06,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:06,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-09 10:54:06,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15330603] [2024-11-09 10:54:06,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:06,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:54:06,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:06,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:54:06,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:54:07,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-09 10:54:07,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 273 flow. Second operand has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 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) [2024-11-09 10:54:07,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:07,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-09 10:54:07,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:08,426 INFO L124 PetriNetUnfolderBase]: 5346/8019 cut-off events. [2024-11-09 10:54:08,426 INFO L125 PetriNetUnfolderBase]: For 9230/9774 co-relation queries the response was YES. [2024-11-09 10:54:08,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23131 conditions, 8019 events. 5346/8019 cut-off events. For 9230/9774 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 43464 event pairs, 1275 based on Foata normal form. 274/8272 useless extension candidates. Maximal degree in co-relation 19380. Up to 2199 conditions per place. [2024-11-09 10:54:08,479 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 137 selfloop transitions, 14 changer transitions 0/160 dead transitions. [2024-11-09 10:54:08,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 160 transitions, 967 flow [2024-11-09 10:54:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 311 transitions. [2024-11-09 10:54:08,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5362068965517242 [2024-11-09 10:54:08,481 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 273 flow. Second operand 10 states and 311 transitions. [2024-11-09 10:54:08,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 160 transitions, 967 flow [2024-11-09 10:54:08,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 160 transitions, 954 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:08,497 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 330 flow [2024-11-09 10:54:08,497 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=330, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-11-09 10:54:08,498 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-11-09 10:54:08,498 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 330 flow [2024-11-09 10:54:08,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 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) [2024-11-09 10:54:08,498 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:08,498 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:08,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:54:08,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:08,699 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:08,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:08,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1046020415, now seen corresponding path program 1 times [2024-11-09 10:54:08,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:08,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950783040] [2024-11-09 10:54:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:08,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:08,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:08,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950783040] [2024-11-09 10:54:08,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950783040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:08,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722432915] [2024-11-09 10:54:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:08,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:08,797 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:08,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:54:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:08,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:54:08,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:08,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:09,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722432915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:09,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:09,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:54:09,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127314434] [2024-11-09 10:54:09,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:09,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:54:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:09,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:54:09,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:54:09,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:54:09,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 21.357142857142858) internal successors, (299), 14 states have internal predecessors, (299), 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) [2024-11-09 10:54:09,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:09,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:54:09,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:09,789 INFO L124 PetriNetUnfolderBase]: 6186/8992 cut-off events. [2024-11-09 10:54:09,789 INFO L125 PetriNetUnfolderBase]: For 17815/18436 co-relation queries the response was YES. [2024-11-09 10:54:09,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28124 conditions, 8992 events. 6186/8992 cut-off events. For 17815/18436 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 45868 event pairs, 3675 based on Foata normal form. 232/9188 useless extension candidates. Maximal degree in co-relation 24570. Up to 7248 conditions per place. [2024-11-09 10:54:09,866 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 86 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2024-11-09 10:54:09,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 728 flow [2024-11-09 10:54:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-11-09 10:54:09,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2024-11-09 10:54:09,868 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 330 flow. Second operand 8 states and 236 transitions. [2024-11-09 10:54:09,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 728 flow [2024-11-09 10:54:09,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 682 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-09 10:54:09,890 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 363 flow [2024-11-09 10:54:09,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-11-09 10:54:09,891 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2024-11-09 10:54:09,891 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 363 flow [2024-11-09 10:54:09,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.357142857142858) internal successors, (299), 14 states have internal predecessors, (299), 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) [2024-11-09 10:54:09,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:09,892 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:09,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:10,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:10,093 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:10,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1609139379, now seen corresponding path program 1 times [2024-11-09 10:54:10,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:10,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567760538] [2024-11-09 10:54:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:10,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567760538] [2024-11-09 10:54:10,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567760538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678108810] [2024-11-09 10:54:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:10,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:10,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:10,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:10,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:54:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:10,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:54:10,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:10,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:10,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678108810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:10,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:10,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-09 10:54:10,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217504029] [2024-11-09 10:54:10,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:10,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:54:10,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:10,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:54:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:54:10,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:54:10,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 363 flow. Second operand has 18 states, 18 states have (on average 21.27777777777778) internal successors, (383), 18 states have internal predecessors, (383), 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) [2024-11-09 10:54:10,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:10,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:54:10,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:11,675 INFO L124 PetriNetUnfolderBase]: 9395/13906 cut-off events. [2024-11-09 10:54:11,675 INFO L125 PetriNetUnfolderBase]: For 27659/28273 co-relation queries the response was YES. [2024-11-09 10:54:11,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45497 conditions, 13906 events. 9395/13906 cut-off events. For 27659/28273 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 78530 event pairs, 4286 based on Foata normal form. 0/13731 useless extension candidates. Maximal degree in co-relation 25272. Up to 6944 conditions per place. [2024-11-09 10:54:11,786 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 140 selfloop transitions, 14 changer transitions 0/162 dead transitions. [2024-11-09 10:54:11,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 162 transitions, 1221 flow [2024-11-09 10:54:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:54:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:54:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-11-09 10:54:11,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5191570881226054 [2024-11-09 10:54:11,788 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 363 flow. Second operand 9 states and 271 transitions. [2024-11-09 10:54:11,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 162 transitions, 1221 flow [2024-11-09 10:54:11,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 162 transitions, 1202 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:11,842 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 446 flow [2024-11-09 10:54:11,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=446, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-11-09 10:54:11,843 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 33 predicate places. [2024-11-09 10:54:11,843 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 446 flow [2024-11-09 10:54:11,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.27777777777778) internal successors, (383), 18 states have internal predecessors, (383), 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) [2024-11-09 10:54:11,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:11,843 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:11,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:54:12,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 10:54:12,045 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:12,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1911731175, now seen corresponding path program 2 times [2024-11-09 10:54:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:12,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014479709] [2024-11-09 10:54:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:12,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:54:12,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:12,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014479709] [2024-11-09 10:54:12,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014479709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:12,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407427525] [2024-11-09 10:54:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:12,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:12,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:12,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:54:12,425 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:12,425 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:12,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:54:12,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:54:12,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:12,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-09 10:54:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:54:12,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407427525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:12,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:12,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-09 10:54:12,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917166365] [2024-11-09 10:54:12,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:12,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:54:12,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:54:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:54:13,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:54:13,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 446 flow. Second operand has 20 states, 20 states have (on average 21.4) internal successors, (428), 20 states have internal predecessors, (428), 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) [2024-11-09 10:54:13,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:13,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:54:13,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:14,822 INFO L124 PetriNetUnfolderBase]: 10112/14006 cut-off events. [2024-11-09 10:54:14,822 INFO L125 PetriNetUnfolderBase]: For 32497/34438 co-relation queries the response was YES. [2024-11-09 10:54:14,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49131 conditions, 14006 events. 10112/14006 cut-off events. For 32497/34438 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 71278 event pairs, 1895 based on Foata normal form. 696/14675 useless extension candidates. Maximal degree in co-relation 37275. Up to 4458 conditions per place. [2024-11-09 10:54:14,917 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 147 selfloop transitions, 14 changer transitions 0/170 dead transitions. [2024-11-09 10:54:14,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 170 transitions, 1390 flow [2024-11-09 10:54:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:54:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:54:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-11-09 10:54:14,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2024-11-09 10:54:14,918 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 446 flow. Second operand 7 states and 214 transitions. [2024-11-09 10:54:14,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 170 transitions, 1390 flow [2024-11-09 10:54:14,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 170 transitions, 1369 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:14,963 INFO L231 Difference]: Finished difference. Result has 95 places, 75 transitions, 481 flow [2024-11-09 10:54:14,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=95, PETRI_TRANSITIONS=75} [2024-11-09 10:54:14,964 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 37 predicate places. [2024-11-09 10:54:14,964 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 75 transitions, 481 flow [2024-11-09 10:54:14,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.4) internal successors, (428), 20 states have internal predecessors, (428), 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) [2024-11-09 10:54:14,965 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:14,965 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:14,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:54:15,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 10:54:15,165 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:15,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1189841843, now seen corresponding path program 2 times [2024-11-09 10:54:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:15,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022659446] [2024-11-09 10:54:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:54:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022659446] [2024-11-09 10:54:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022659446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:15,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398492005] [2024-11-09 10:54:15,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:15,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:15,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:15,392 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:15,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:54:15,475 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:15,475 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:15,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:54:15,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:15,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:15,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 10:54:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:15,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398492005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:15,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:15,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2024-11-09 10:54:15,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579034059] [2024-11-09 10:54:15,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:15,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:54:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:54:15,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:54:16,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-09 10:54:16,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 75 transitions, 481 flow. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:16,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:16,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-09 10:54:16,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:18,563 INFO L124 PetriNetUnfolderBase]: 11631/16299 cut-off events. [2024-11-09 10:54:18,564 INFO L125 PetriNetUnfolderBase]: For 51606/53061 co-relation queries the response was YES. [2024-11-09 10:54:18,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60392 conditions, 16299 events. 11631/16299 cut-off events. For 51606/53061 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 84799 event pairs, 1539 based on Foata normal form. 640/16609 useless extension candidates. Maximal degree in co-relation 39359. Up to 2716 conditions per place. [2024-11-09 10:54:18,685 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 254 selfloop transitions, 21 changer transitions 0/282 dead transitions. [2024-11-09 10:54:18,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 282 transitions, 2287 flow [2024-11-09 10:54:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 10:54:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-09 10:54:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 475 transitions. [2024-11-09 10:54:18,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5118534482758621 [2024-11-09 10:54:18,687 INFO L175 Difference]: Start difference. First operand has 95 places, 75 transitions, 481 flow. Second operand 16 states and 475 transitions. [2024-11-09 10:54:18,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 282 transitions, 2287 flow [2024-11-09 10:54:18,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 282 transitions, 2169 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:18,772 INFO L231 Difference]: Finished difference. Result has 105 places, 76 transitions, 509 flow [2024-11-09 10:54:18,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=509, PETRI_PLACES=105, PETRI_TRANSITIONS=76} [2024-11-09 10:54:18,773 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2024-11-09 10:54:18,773 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 76 transitions, 509 flow [2024-11-09 10:54:18,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:18,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:18,774 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 10:54:18,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:54:18,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:54:18,974 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:18,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1981770851, now seen corresponding path program 3 times [2024-11-09 10:54:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:18,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302365911] [2024-11-09 10:54:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:19,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302365911] [2024-11-09 10:54:19,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302365911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:19,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384348157] [2024-11-09 10:54:19,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:54:19,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:19,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:19,117 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:19,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:54:19,195 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:54:19,196 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:19,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:54:19,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:19,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:19,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 10:54:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384348157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:19,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:19,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-09 10:54:19,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711494966] [2024-11-09 10:54:19,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:19,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:54:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:19,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:54:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:54:19,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-09 10:54:19,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 76 transitions, 509 flow. Second operand has 20 states, 20 states have (on average 19.35) internal successors, (387), 20 states have internal predecessors, (387), 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) [2024-11-09 10:54:19,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:19,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-09 10:54:19,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:21,491 INFO L124 PetriNetUnfolderBase]: 11024/15644 cut-off events. [2024-11-09 10:54:21,492 INFO L125 PetriNetUnfolderBase]: For 43848/45316 co-relation queries the response was YES. [2024-11-09 10:54:21,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55654 conditions, 15644 events. 11024/15644 cut-off events. For 43848/45316 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 83106 event pairs, 1796 based on Foata normal form. 242/15862 useless extension candidates. Maximal degree in co-relation 43631. Up to 4056 conditions per place. [2024-11-09 10:54:21,606 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 256 selfloop transitions, 27 changer transitions 0/291 dead transitions. [2024-11-09 10:54:21,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 291 transitions, 2357 flow [2024-11-09 10:54:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 10:54:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-09 10:54:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 473 transitions. [2024-11-09 10:54:21,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.509698275862069 [2024-11-09 10:54:21,610 INFO L175 Difference]: Start difference. First operand has 105 places, 76 transitions, 509 flow. Second operand 16 states and 473 transitions. [2024-11-09 10:54:21,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 291 transitions, 2357 flow [2024-11-09 10:54:21,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 291 transitions, 2052 flow, removed 37 selfloop flow, removed 15 redundant places. [2024-11-09 10:54:21,845 INFO L231 Difference]: Finished difference. Result has 109 places, 84 transitions, 579 flow [2024-11-09 10:54:21,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=579, PETRI_PLACES=109, PETRI_TRANSITIONS=84} [2024-11-09 10:54:21,846 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 51 predicate places. [2024-11-09 10:54:21,846 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 84 transitions, 579 flow [2024-11-09 10:54:21,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.35) internal successors, (387), 20 states have internal predecessors, (387), 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) [2024-11-09 10:54:21,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:21,846 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] [2024-11-09 10:54:21,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:54:22,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:54:22,047 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:22,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:22,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1952924736, now seen corresponding path program 1 times [2024-11-09 10:54:22,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:22,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184978087] [2024-11-09 10:54:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:22,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184978087] [2024-11-09 10:54:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184978087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306289130] [2024-11-09 10:54:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:22,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:22,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:22,288 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:22,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:54:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:22,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:54:22,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:22,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:22,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306289130] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:22,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:54:22,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-09 10:54:22,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865483990] [2024-11-09 10:54:22,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:22,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:54:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:22,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:54:22,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:54:22,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:54:22,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 84 transitions, 579 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2024-11-09 10:54:22,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:22,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:54:22,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:23,915 INFO L124 PetriNetUnfolderBase]: 10744/15356 cut-off events. [2024-11-09 10:54:23,915 INFO L125 PetriNetUnfolderBase]: For 43230/44187 co-relation queries the response was YES. [2024-11-09 10:54:23,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53085 conditions, 15356 events. 10744/15356 cut-off events. For 43230/44187 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 84312 event pairs, 2227 based on Foata normal form. 280/15612 useless extension candidates. Maximal degree in co-relation 41834. Up to 9604 conditions per place. [2024-11-09 10:54:24,118 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 92 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2024-11-09 10:54:24,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 936 flow [2024-11-09 10:54:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:54:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:54:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-11-09 10:54:24,119 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2024-11-09 10:54:24,119 INFO L175 Difference]: Start difference. First operand has 109 places, 84 transitions, 579 flow. Second operand 5 states and 144 transitions. [2024-11-09 10:54:24,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 936 flow [2024-11-09 10:54:24,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 893 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-09 10:54:24,167 INFO L231 Difference]: Finished difference. Result has 105 places, 81 transitions, 529 flow [2024-11-09 10:54:24,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=105, PETRI_TRANSITIONS=81} [2024-11-09 10:54:24,167 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2024-11-09 10:54:24,167 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 81 transitions, 529 flow [2024-11-09 10:54:24,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2024-11-09 10:54:24,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:24,168 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] [2024-11-09 10:54:24,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:54:24,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:54:24,369 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:24,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:24,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1015398688, now seen corresponding path program 1 times [2024-11-09 10:54:24,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:24,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377587995] [2024-11-09 10:54:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:24,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:24,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:24,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377587995] [2024-11-09 10:54:24,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377587995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:24,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:24,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:54:24,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520454517] [2024-11-09 10:54:24,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:24,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:54:24,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:54:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:54:24,435 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-09 10:54:24,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 81 transitions, 529 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:24,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:24,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-09 10:54:24,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:25,586 INFO L124 PetriNetUnfolderBase]: 10788/15040 cut-off events. [2024-11-09 10:54:25,586 INFO L125 PetriNetUnfolderBase]: For 42545/43289 co-relation queries the response was YES. [2024-11-09 10:54:25,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51984 conditions, 15040 events. 10788/15040 cut-off events. For 42545/43289 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 77664 event pairs, 3059 based on Foata normal form. 409/15044 useless extension candidates. Maximal degree in co-relation 36988. Up to 8002 conditions per place. [2024-11-09 10:54:25,689 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 101 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-11-09 10:54:25,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 119 transitions, 1021 flow [2024-11-09 10:54:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-11-09 10:54:25,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-11-09 10:54:25,690 INFO L175 Difference]: Start difference. First operand has 105 places, 81 transitions, 529 flow. Second operand 4 states and 124 transitions. [2024-11-09 10:54:25,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 119 transitions, 1021 flow [2024-11-09 10:54:25,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 119 transitions, 975 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:25,754 INFO L231 Difference]: Finished difference. Result has 104 places, 79 transitions, 503 flow [2024-11-09 10:54:25,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=503, PETRI_PLACES=104, PETRI_TRANSITIONS=79} [2024-11-09 10:54:25,755 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 46 predicate places. [2024-11-09 10:54:25,755 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 79 transitions, 503 flow [2024-11-09 10:54:25,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:25,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:25,756 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] [2024-11-09 10:54:25,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:54:25,756 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:25,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2133621176, now seen corresponding path program 1 times [2024-11-09 10:54:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:25,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467189023] [2024-11-09 10:54:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:26,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467189023] [2024-11-09 10:54:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467189023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490255207] [2024-11-09 10:54:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:26,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:26,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:26,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:54:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:26,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 10:54:26,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:26,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:54:27,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-09 10:54:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:27,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:27,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2024-11-09 10:54:27,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2024-11-09 10:54:28,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2024-11-09 10:54:28,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:28,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 218 [2024-11-09 10:54:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:32,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490255207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:32,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:32,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-09 10:54:32,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131751804] [2024-11-09 10:54:32,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:32,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 10:54:32,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 10:54:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2024-11-09 10:54:34,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-09 10:54:34,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 79 transitions, 503 flow. Second operand has 29 states, 29 states have (on average 20.689655172413794) internal successors, (600), 29 states have internal predecessors, (600), 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) [2024-11-09 10:54:34,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:34,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-09 10:54:34,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:39,260 INFO L124 PetriNetUnfolderBase]: 21804/30986 cut-off events. [2024-11-09 10:54:39,260 INFO L125 PetriNetUnfolderBase]: For 90273/91472 co-relation queries the response was YES. [2024-11-09 10:54:39,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105960 conditions, 30986 events. 21804/30986 cut-off events. For 90273/91472 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 179148 event pairs, 1979 based on Foata normal form. 4/29878 useless extension candidates. Maximal degree in co-relation 84275. Up to 17500 conditions per place. [2024-11-09 10:54:39,639 INFO L140 encePairwiseOnDemand]: 42/58 looper letters, 314 selfloop transitions, 106 changer transitions 47/475 dead transitions. [2024-11-09 10:54:39,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 475 transitions, 3613 flow [2024-11-09 10:54:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 10:54:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-09 10:54:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 975 transitions. [2024-11-09 10:54:39,643 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49442190669371194 [2024-11-09 10:54:39,643 INFO L175 Difference]: Start difference. First operand has 104 places, 79 transitions, 503 flow. Second operand 34 states and 975 transitions. [2024-11-09 10:54:39,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 475 transitions, 3613 flow [2024-11-09 10:54:39,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 475 transitions, 3531 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:54:39,902 INFO L231 Difference]: Finished difference. Result has 149 places, 176 transitions, 1502 flow [2024-11-09 10:54:39,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1502, PETRI_PLACES=149, PETRI_TRANSITIONS=176} [2024-11-09 10:54:39,903 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 91 predicate places. [2024-11-09 10:54:39,903 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 176 transitions, 1502 flow [2024-11-09 10:54:39,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 20.689655172413794) internal successors, (600), 29 states have internal predecessors, (600), 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) [2024-11-09 10:54:39,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:39,904 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] [2024-11-09 10:54:39,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:40,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:40,105 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:54:40,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash -639374484, now seen corresponding path program 2 times [2024-11-09 10:54:40,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:40,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940858322] [2024-11-09 10:54:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:40,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:41,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940858322] [2024-11-09 10:54:41,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940858322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979484995] [2024-11-09 10:54:41,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:41,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:41,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:41,011 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:41,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:54:41,095 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:41,095 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:41,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 10:54:41,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:41,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:54:41,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-09 10:54:41,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2024-11-09 10:54:41,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-09 10:54:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:41,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:41,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2024-11-09 10:54:41,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2024-11-09 10:54:42,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 169 [2024-11-09 10:54:42,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:42,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 232 [2024-11-09 10:54:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:51,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979484995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:51,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:51,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-09 10:54:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9289626] [2024-11-09 10:54:51,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:51,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 10:54:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:51,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 10:54:51,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-11-09 10:54:52,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-09 10:54:52,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 176 transitions, 1502 flow. Second operand has 29 states, 29 states have (on average 20.689655172413794) internal successors, (600), 29 states have internal predecessors, (600), 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) [2024-11-09 10:54:52,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:52,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-09 10:54:52,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:00,145 INFO L124 PetriNetUnfolderBase]: 27937/39216 cut-off events. [2024-11-09 10:55:00,145 INFO L125 PetriNetUnfolderBase]: For 145400/147454 co-relation queries the response was YES. [2024-11-09 10:55:00,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149960 conditions, 39216 events. 27937/39216 cut-off events. For 145400/147454 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 230153 event pairs, 2888 based on Foata normal form. 3/37917 useless extension candidates. Maximal degree in co-relation 149905. Up to 27149 conditions per place. [2024-11-09 10:55:00,570 INFO L140 encePairwiseOnDemand]: 41/58 looper letters, 361 selfloop transitions, 200 changer transitions 25/594 dead transitions. [2024-11-09 10:55:00,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 594 transitions, 5454 flow [2024-11-09 10:55:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 10:55:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-09 10:55:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1068 transitions. [2024-11-09 10:55:00,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47214854111405835 [2024-11-09 10:55:00,572 INFO L175 Difference]: Start difference. First operand has 149 places, 176 transitions, 1502 flow. Second operand 39 states and 1068 transitions. [2024-11-09 10:55:00,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 594 transitions, 5454 flow [2024-11-09 10:55:01,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 594 transitions, 5374 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-11-09 10:55:01,307 INFO L231 Difference]: Finished difference. Result has 188 places, 330 transitions, 3603 flow [2024-11-09 10:55:01,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3603, PETRI_PLACES=188, PETRI_TRANSITIONS=330} [2024-11-09 10:55:01,307 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 130 predicate places. [2024-11-09 10:55:01,308 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 330 transitions, 3603 flow [2024-11-09 10:55:01,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 20.689655172413794) internal successors, (600), 29 states have internal predecessors, (600), 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) [2024-11-09 10:55:01,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:01,308 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] [2024-11-09 10:55:01,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 10:55:01,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:01,509 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:55:01,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1900677416, now seen corresponding path program 3 times [2024-11-09 10:55:01,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:01,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501040734] [2024-11-09 10:55:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:01,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:02,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501040734] [2024-11-09 10:55:02,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501040734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113942549] [2024-11-09 10:55:02,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:55:02,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:02,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:02,091 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:02,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:55:02,187 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:55:02,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:02,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:55:02,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:02,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:55:02,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-09 10:55:02,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2024-11-09 10:55:02,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-09 10:55:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:02,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:02,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2024-11-09 10:55:02,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2024-11-09 10:55:03,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 96 [2024-11-09 10:55:03,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 132 [2024-11-09 10:55:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:03,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113942549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:03,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:03,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2024-11-09 10:55:03,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4410369] [2024-11-09 10:55:03,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:03,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 10:55:03,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 10:55:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2024-11-09 10:55:05,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-09 10:55:05,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 330 transitions, 3603 flow. Second operand has 31 states, 31 states have (on average 20.516129032258064) internal successors, (636), 31 states have internal predecessors, (636), 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) [2024-11-09 10:55:05,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:05,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-09 10:55:05,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand