./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-max-array.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 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:51:41,949 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:51:41,993 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:51:41,998 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:51:41,999 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:51:42,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:51:42,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:51:42,018 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:51:42,018 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:51:42,019 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:51:42,019 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:51:42,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:51:42,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:51:42,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:51:42,020 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:51:42,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:51:42,021 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:51:42,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:51:42,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:51:42,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:51:42,021 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:51:42,023 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:51:42,024 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:51:42,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:51:42,024 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:51:42,024 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:51:42,024 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:51:42,024 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:51:42,025 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:51:42,025 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:51:42,025 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:51:42,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:51:42,025 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:51:42,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:42,026 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:51:42,026 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:51:42,026 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:51:42,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:51:42,026 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:51:42,027 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:51:42,027 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:51:42,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:51:42,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 [2024-11-19 09:51:42,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:51:42,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:51:42,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:51:42,271 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:51:42,271 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:51:42,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2024-11-19 09:51:43,511 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:51:43,652 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:51:43,652 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2024-11-19 09:51:43,658 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5efb84e75/b6d65d71583f46b3998a65ce57f097f5/FLAG70b317206 [2024-11-19 09:51:43,669 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5efb84e75/b6d65d71583f46b3998a65ce57f097f5 [2024-11-19 09:51:43,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:51:43,672 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:51:43,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:43,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:51:43,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:51:43,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36db0d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43, skipping insertion in model container [2024-11-19 09:51:43,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,702 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:51:43,876 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:51:43,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:43,883 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:51:43,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:43,913 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:51:43,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43 WrapperNode [2024-11-19 09:51:43,914 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:43,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:43,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:51:43,915 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:51:43,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,926 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,946 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 88 [2024-11-19 09:51:43,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:43,947 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:51:43,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:51:43,947 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:51:43,955 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,958 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,968 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:51:43,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,986 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,987 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,988 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:51:43,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:51:43,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:51:43,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:51:43,991 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (1/1) ... [2024-11-19 09:51:43,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:44,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:44,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:51:44,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:51:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:51:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:51:44,062 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:51:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:51:44,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:51:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:51:44,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:51:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:51:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:51:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:51:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:51:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:51:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:51:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:51:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:51:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:51:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:51:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:51:44,066 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:51:44,181 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:51:44,182 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:51:44,474 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:51:44,475 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:51:44,639 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:51:44,639 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:51:44,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:44 BoogieIcfgContainer [2024-11-19 09:51:44,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:51:44,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:51:44,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:51:44,646 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:51:44,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:51:43" (1/3) ... [2024-11-19 09:51:44,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4df67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:44, skipping insertion in model container [2024-11-19 09:51:44,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:43" (2/3) ... [2024-11-19 09:51:44,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4df67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:44, skipping insertion in model container [2024-11-19 09:51:44,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:44" (3/3) ... [2024-11-19 09:51:44,647 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2024-11-19 09:51:44,659 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:51:44,659 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-19 09:51:44,659 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:51:44,705 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:51:44,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-11-19 09:51:44,755 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-11-19 09:51:44,756 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:51:44,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 103 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-19 09:51:44,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-11-19 09:51:44,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-11-19 09:51:44,791 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:51:44,796 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;@78cb7f79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:51:44,796 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-19 09:51:44,799 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:51:44,799 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:51:44,799 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:44,799 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:44,800 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:44,800 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:44,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash 492868, now seen corresponding path program 1 times [2024-11-19 09:51:44,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:44,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720488136] [2024-11-19 09:51:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:44,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:45,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720488136] [2024-11-19 09:51:45,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720488136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:45,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:51:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807898028] [2024-11-19 09:51:45,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:45,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:45,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:45,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:45,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:45,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:45,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:45,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:45,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:45,349 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-11-19 09:51:45,350 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-19 09:51:45,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9858 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-11-19 09:51:45,367 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-19 09:51:45,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-19 09:51:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-19 09:51:45,378 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-19 09:51:45,380 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-11-19 09:51:45,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-19 09:51:45,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:51:45,392 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-19 09:51:45,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-19 09:51:45,396 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-11-19 09:51:45,397 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-19 09:51:45,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:45,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:45,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:45,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:51:45,398 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:45,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 492869, now seen corresponding path program 1 times [2024-11-19 09:51:45,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:45,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939360068] [2024-11-19 09:51:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:45,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:45,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:45,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939360068] [2024-11-19 09:51:45,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939360068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:45,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:45,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:45,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433361986] [2024-11-19 09:51:45,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:45,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:45,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:45,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:45,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:45,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:45,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:45,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:45,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:45,861 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-11-19 09:51:45,862 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:45,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9817 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-11-19 09:51:45,870 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-19 09:51:45,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-19 09:51:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-19 09:51:45,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-19 09:51:45,873 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-19 09:51:45,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-19 09:51:45,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:45,876 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-19 09:51:45,876 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-19 09:51:45,877 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-19 09:51:45,877 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-19 09:51:45,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:45,877 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:45,878 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:51:45,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:51:45,878 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:45,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash 473662361, now seen corresponding path program 1 times [2024-11-19 09:51:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:45,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903149036] [2024-11-19 09:51:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:45,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:46,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:46,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903149036] [2024-11-19 09:51:46,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903149036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:46,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382718083] [2024-11-19 09:51:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:46,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:46,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:46,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:46,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:51:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:46,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:51:46,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:46,250 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 [2024-11-19 09:51:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:46,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382718083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:46,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:46,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:51:46,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076178784] [2024-11-19 09:51:46,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:46,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:51:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:46,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:51:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:51:46,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:46,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:46,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:46,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:46,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:46,797 INFO L124 PetriNetUnfolderBase]: 1317/1932 cut-off events. [2024-11-19 09:51:46,797 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:46,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1932 events. 1317/1932 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9863 event pairs, 1060 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3850. Up to 1878 conditions per place. [2024-11-19 09:51:46,806 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-19 09:51:46,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-19 09:51:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:51:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:51:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-19 09:51:46,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-19 09:51:46,809 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-19 09:51:46,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-19 09:51:46,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:46,810 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-19 09:51:46,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-19 09:51:46,810 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-19 09:51:46,811 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-19 09:51:46,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:46,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:46,811 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:51:46,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:51:47,011 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 [2024-11-19 09:51:47,012 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:47,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1800714578, now seen corresponding path program 1 times [2024-11-19 09:51:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:47,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828648323] [2024-11-19 09:51:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828648323] [2024-11-19 09:51:47,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828648323] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:47,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:47,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:47,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579359085] [2024-11-19 09:51:47,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:47,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:47,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:51:47,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:47,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:47,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:51:47,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:47,191 INFO L124 PetriNetUnfolderBase]: 1316/1931 cut-off events. [2024-11-19 09:51:47,191 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:47,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1931 events. 1316/1931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9800 event pairs, 1060 based on Foata normal form. 1/1378 useless extension candidates. Maximal degree in co-relation 3851. Up to 1880 conditions per place. [2024-11-19 09:51:47,199 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-19 09:51:47,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 176 flow [2024-11-19 09:51:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-19 09:51:47,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-19 09:51:47,201 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 3 states and 65 transitions. [2024-11-19 09:51:47,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 176 flow [2024-11-19 09:51:47,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 150 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-19 09:51:47,203 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-19 09:51:47,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-19 09:51:47,205 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-19 09:51:47,205 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-19 09:51:47,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:47,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:47,206 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:47,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:51:47,206 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:47,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1910385278, now seen corresponding path program 1 times [2024-11-19 09:51:47,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:47,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486682767] [2024-11-19 09:51:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:47,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486682767] [2024-11-19 09:51:47,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486682767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:47,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107151303] [2024-11-19 09:51:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:47,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:47,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:47,354 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:47,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:51:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:47,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:51:47,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:47,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:47,522 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 [2024-11-19 09:51:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:47,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107151303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:47,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:47,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 09:51:47,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117249079] [2024-11-19 09:51:47,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:47,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:51:47,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:47,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:51:47,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:51:47,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:51:47,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:47,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:47,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:51:47,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:47,879 INFO L124 PetriNetUnfolderBase]: 2020/2971 cut-off events. [2024-11-19 09:51:47,879 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:47,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5883 conditions, 2971 events. 2020/2971 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 16225 event pairs, 880 based on Foata normal form. 0/2182 useless extension candidates. Maximal degree in co-relation 5872. Up to 1670 conditions per place. [2024-11-19 09:51:47,891 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 64 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-11-19 09:51:47,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 76 transitions, 310 flow [2024-11-19 09:51:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-11-19 09:51:47,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4085714285714286 [2024-11-19 09:51:47,892 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 7 states and 143 transitions. [2024-11-19 09:51:47,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 76 transitions, 310 flow [2024-11-19 09:51:47,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 76 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:47,894 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 119 flow [2024-11-19 09:51:47,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=119, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-19 09:51:47,895 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-19 09:51:47,895 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 119 flow [2024-11-19 09:51:47,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:47,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:47,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:47,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:51:48,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:48,104 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:48,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1910385277, now seen corresponding path program 1 times [2024-11-19 09:51:48,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:48,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228978344] [2024-11-19 09:51:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:48,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:48,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228978344] [2024-11-19 09:51:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228978344] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446449067] [2024-11-19 09:51:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:48,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:48,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:48,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:48,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:48,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:48,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:48,244 INFO L124 PetriNetUnfolderBase]: 1148/1674 cut-off events. [2024-11-19 09:51:48,244 INFO L125 PetriNetUnfolderBase]: For 949/949 co-relation queries the response was YES. [2024-11-19 09:51:48,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4088 conditions, 1674 events. 1148/1674 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7755 event pairs, 858 based on Foata normal form. 123/1590 useless extension candidates. Maximal degree in co-relation 801. Up to 1614 conditions per place. [2024-11-19 09:51:48,251 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-19 09:51:48,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 181 flow [2024-11-19 09:51:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-19 09:51:48,252 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-19 09:51:48,252 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 119 flow. Second operand 4 states and 68 transitions. [2024-11-19 09:51:48,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 181 flow [2024-11-19 09:51:48,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:48,254 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 112 flow [2024-11-19 09:51:48,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-11-19 09:51:48,254 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -9 predicate places. [2024-11-19 09:51:48,254 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 112 flow [2024-11-19 09:51:48,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:48,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:48,255 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:48,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:51:48,255 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:48,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1899684390, now seen corresponding path program 1 times [2024-11-19 09:51:48,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:48,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006028823] [2024-11-19 09:51:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:48,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:48,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:48,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006028823] [2024-11-19 09:51:48,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006028823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:48,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560284950] [2024-11-19 09:51:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:48,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:48,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:48,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:48,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:51:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:48,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:51:48,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:48,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:48,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560284950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:48,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:48,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:51:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110905980] [2024-11-19 09:51:48,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:48,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:51:48,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:48,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:51:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:51:48,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:48,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:48,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:48,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:48,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:48,782 INFO L124 PetriNetUnfolderBase]: 1981/2890 cut-off events. [2024-11-19 09:51:48,782 INFO L125 PetriNetUnfolderBase]: For 1751/1751 co-relation queries the response was YES. [2024-11-19 09:51:48,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7155 conditions, 2890 events. 1981/2890 cut-off events. For 1751/1751 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14193 event pairs, 1312 based on Foata normal form. 0/2560 useless extension candidates. Maximal degree in co-relation 4828. Up to 1931 conditions per place. [2024-11-19 09:51:48,800 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 72 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-11-19 09:51:48,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 83 transitions, 422 flow [2024-11-19 09:51:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-19 09:51:48,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-19 09:51:48,803 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 112 flow. Second operand 7 states and 135 transitions. [2024-11-19 09:51:48,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 83 transitions, 422 flow [2024-11-19 09:51:48,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 83 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:48,807 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 160 flow [2024-11-19 09:51:48,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-19 09:51:48,809 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-11-19 09:51:48,809 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 160 flow [2024-11-19 09:51:48,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:48,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:48,809 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:48,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:51:49,010 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 [2024-11-19 09:51:49,011 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:49,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash -323254620, now seen corresponding path program 1 times [2024-11-19 09:51:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:49,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496615806] [2024-11-19 09:51:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:49,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:49,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496615806] [2024-11-19 09:51:49,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496615806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104000994] [2024-11-19 09:51:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:49,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:49,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:49,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:51:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:49,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:51:49,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:49,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:49,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104000994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:49,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:49,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:51:49,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712992200] [2024-11-19 09:51:49,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:49,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:51:49,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:51:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:51:49,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:49,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 160 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:49,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:49,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:49,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:49,579 INFO L124 PetriNetUnfolderBase]: 1935/2831 cut-off events. [2024-11-19 09:51:49,579 INFO L125 PetriNetUnfolderBase]: For 1659/1761 co-relation queries the response was YES. [2024-11-19 09:51:49,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7305 conditions, 2831 events. 1935/2831 cut-off events. For 1659/1761 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13686 event pairs, 1243 based on Foata normal form. 38/2608 useless extension candidates. Maximal degree in co-relation 5138. Up to 2035 conditions per place. [2024-11-19 09:51:49,590 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-19 09:51:49,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 462 flow [2024-11-19 09:51:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-11-19 09:51:49,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-19 09:51:49,592 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 160 flow. Second operand 8 states and 155 transitions. [2024-11-19 09:51:49,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 462 flow [2024-11-19 09:51:49,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 88 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:49,595 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 219 flow [2024-11-19 09:51:49,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=219, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-11-19 09:51:49,595 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-19 09:51:49,595 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 219 flow [2024-11-19 09:51:49,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:49,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:49,596 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:49,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:51:49,796 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 [2024-11-19 09:51:49,797 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:49,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 200137493, now seen corresponding path program 1 times [2024-11-19 09:51:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726372887] [2024-11-19 09:51:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:49,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:49,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726372887] [2024-11-19 09:51:49,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726372887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:49,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198588411] [2024-11-19 09:51:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:49,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:49,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:49,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:49,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:51:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:49,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:51:49,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:50,004 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 [2024-11-19 09:51:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:50,086 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:51:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198588411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:50,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:51:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-19 09:51:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799956746] [2024-11-19 09:51:50,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:50,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:51:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:51:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:51:50,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:51:50,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:50,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:50,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:51:50,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:50,373 INFO L124 PetriNetUnfolderBase]: 2208/3335 cut-off events. [2024-11-19 09:51:50,374 INFO L125 PetriNetUnfolderBase]: For 4364/4483 co-relation queries the response was YES. [2024-11-19 09:51:50,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9322 conditions, 3335 events. 2208/3335 cut-off events. For 4364/4483 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17526 event pairs, 1202 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 6311. Up to 2353 conditions per place. [2024-11-19 09:51:50,386 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 62 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2024-11-19 09:51:50,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 481 flow [2024-11-19 09:51:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-19 09:51:50,387 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-19 09:51:50,387 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 219 flow. Second operand 5 states and 96 transitions. [2024-11-19 09:51:50,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 481 flow [2024-11-19 09:51:50,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 466 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-19 09:51:50,392 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 231 flow [2024-11-19 09:51:50,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-11-19 09:51:50,393 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-11-19 09:51:50,393 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 231 flow [2024-11-19 09:51:50,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:50,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:50,394 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:50,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:50,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:50,598 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:50,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:50,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1175444818, now seen corresponding path program 2 times [2024-11-19 09:51:50,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:50,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538850813] [2024-11-19 09:51:50,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:50,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:50,616 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:51:50,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:51:50,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:50,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538850813] [2024-11-19 09:51:50,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538850813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:50,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:50,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:51:50,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718142756] [2024-11-19 09:51:50,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:50,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:51:50,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:50,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:51:50,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:51:50,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:50,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:50,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:50,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:50,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:51,153 INFO L124 PetriNetUnfolderBase]: 3599/5101 cut-off events. [2024-11-19 09:51:51,153 INFO L125 PetriNetUnfolderBase]: For 7196/7310 co-relation queries the response was YES. [2024-11-19 09:51:51,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15632 conditions, 5101 events. 3599/5101 cut-off events. For 7196/7310 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24768 event pairs, 1728 based on Foata normal form. 0/4729 useless extension candidates. Maximal degree in co-relation 12418. Up to 3356 conditions per place. [2024-11-19 09:51:51,174 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 83 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2024-11-19 09:51:51,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 637 flow [2024-11-19 09:51:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:51:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:51:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-19 09:51:51,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-11-19 09:51:51,175 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 231 flow. Second operand 6 states and 117 transitions. [2024-11-19 09:51:51,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 637 flow [2024-11-19 09:51:51,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 622 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:51,180 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 265 flow [2024-11-19 09:51:51,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-11-19 09:51:51,181 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-11-19 09:51:51,181 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 265 flow [2024-11-19 09:51:51,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:51,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:51,181 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:51,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:51:51,181 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:51,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1299844872, now seen corresponding path program 2 times [2024-11-19 09:51:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:51,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266806971] [2024-11-19 09:51:51,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:51,193 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:51,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:51:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266806971] [2024-11-19 09:51:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266806971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720902812] [2024-11-19 09:51:51,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:51,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:51,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:51,332 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) [2024-11-19 09:51:51,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:51:51,384 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:51,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:51,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:51:51,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:51,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:51,565 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 [2024-11-19 09:51:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:51,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720902812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:51,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:51,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-19 09:51:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079441260] [2024-11-19 09:51:51,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:51,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:51:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:51:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:51:51,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:51,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 265 flow. Second operand has 19 states, 19 states have (on average 10.947368421052632) internal successors, (208), 19 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:51,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:51,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:51,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:52,782 INFO L124 PetriNetUnfolderBase]: 4501/6355 cut-off events. [2024-11-19 09:51:52,782 INFO L125 PetriNetUnfolderBase]: For 8695/9665 co-relation queries the response was YES. [2024-11-19 09:51:52,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20386 conditions, 6355 events. 4501/6355 cut-off events. For 8695/9665 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 31519 event pairs, 770 based on Foata normal form. 584/6929 useless extension candidates. Maximal degree in co-relation 15964. Up to 1257 conditions per place. [2024-11-19 09:51:52,867 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 171 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-11-19 09:51:52,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 195 transitions, 1201 flow [2024-11-19 09:51:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:51:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:51:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-11-19 09:51:52,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-11-19 09:51:52,869 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 265 flow. Second operand 14 states and 290 transitions. [2024-11-19 09:51:52,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 195 transitions, 1201 flow [2024-11-19 09:51:52,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 195 transitions, 1160 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:52,879 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 331 flow [2024-11-19 09:51:52,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=331, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2024-11-19 09:51:52,879 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 24 predicate places. [2024-11-19 09:51:52,879 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 331 flow [2024-11-19 09:51:52,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.947368421052632) internal successors, (208), 19 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:52,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:52,880 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:52,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:51:53,084 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 [2024-11-19 09:51:53,085 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:53,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash 882032767, now seen corresponding path program 1 times [2024-11-19 09:51:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:53,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060607966] [2024-11-19 09:51:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:53,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:53,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:53,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060607966] [2024-11-19 09:51:53,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060607966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:53,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823336355] [2024-11-19 09:51:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:53,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:53,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:53,180 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) [2024-11-19 09:51:53,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:51:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:53,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:51:53,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:53,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:53,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823336355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:53,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:53,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:51:53,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023593496] [2024-11-19 09:51:53,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:53,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:51:53,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:51:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:51:53,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:53,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 331 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:53,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:53,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:53,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:53,925 INFO L124 PetriNetUnfolderBase]: 4085/5779 cut-off events. [2024-11-19 09:51:53,925 INFO L125 PetriNetUnfolderBase]: For 13915/14704 co-relation queries the response was YES. [2024-11-19 09:51:53,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20070 conditions, 5779 events. 4085/5779 cut-off events. For 13915/14704 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 28048 event pairs, 2684 based on Foata normal form. 410/6066 useless extension candidates. Maximal degree in co-relation 16578. Up to 4739 conditions per place. [2024-11-19 09:51:53,954 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 80 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-11-19 09:51:53,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 96 transitions, 735 flow [2024-11-19 09:51:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-11-19 09:51:53,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3675 [2024-11-19 09:51:53,955 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 331 flow. Second operand 8 states and 147 transitions. [2024-11-19 09:51:53,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 96 transitions, 735 flow [2024-11-19 09:51:53,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 96 transitions, 624 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-11-19 09:51:53,963 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 327 flow [2024-11-19 09:51:53,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-11-19 09:51:53,964 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 24 predicate places. [2024-11-19 09:51:53,964 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 327 flow [2024-11-19 09:51:53,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:53,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:53,965 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:53,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:54,165 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 [2024-11-19 09:51:54,165 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:54,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash 808785465, now seen corresponding path program 1 times [2024-11-19 09:51:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:54,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193024842] [2024-11-19 09:51:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:54,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:54,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193024842] [2024-11-19 09:51:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193024842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610793893] [2024-11-19 09:51:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:54,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:54,245 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) [2024-11-19 09:51:54,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:51:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:54,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:51:54,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:54,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:54,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610793893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:54,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:54,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-19 09:51:54,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190841835] [2024-11-19 09:51:54,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:54,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:51:54,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:54,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:51:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:51:54,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:54,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 327 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:54,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:54,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:55,234 INFO L124 PetriNetUnfolderBase]: 6931/9907 cut-off events. [2024-11-19 09:51:55,234 INFO L125 PetriNetUnfolderBase]: For 16332/16658 co-relation queries the response was YES. [2024-11-19 09:51:55,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33225 conditions, 9907 events. 6931/9907 cut-off events. For 16332/16658 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 52453 event pairs, 3567 based on Foata normal form. 43/9661 useless extension candidates. Maximal degree in co-relation 18105. Up to 5243 conditions per place. [2024-11-19 09:51:55,275 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 127 selfloop transitions, 14 changer transitions 0/146 dead transitions. [2024-11-19 09:51:55,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 146 transitions, 1045 flow [2024-11-19 09:51:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:51:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:51:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-11-19 09:51:55,276 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-11-19 09:51:55,276 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 327 flow. Second operand 9 states and 170 transitions. [2024-11-19 09:51:55,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 146 transitions, 1045 flow [2024-11-19 09:51:55,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 146 transitions, 1026 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-19 09:51:55,296 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 414 flow [2024-11-19 09:51:55,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=414, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-11-19 09:51:55,297 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-11-19 09:51:55,297 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 414 flow [2024-11-19 09:51:55,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:55,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:55,298 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:55,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:51:55,498 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 [2024-11-19 09:51:55,498 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:55,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash -541597485, now seen corresponding path program 2 times [2024-11-19 09:51:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:55,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601210254] [2024-11-19 09:51:55,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:55,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:55,513 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:55,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:51:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601210254] [2024-11-19 09:51:55,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601210254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758900639] [2024-11-19 09:51:55,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:55,658 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) [2024-11-19 09:51:55,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:51:55,710 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:55,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:55,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:51:55,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:51:55,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:56,131 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 [2024-11-19 09:51:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:51:56,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758900639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:56,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:56,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2024-11-19 09:51:56,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122761232] [2024-11-19 09:51:56,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:56,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:51:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:51:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:51:56,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:56,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 414 flow. Second operand has 18 states, 18 states have (on average 11.61111111111111) internal successors, (209), 18 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:56,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:56,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:56,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:57,096 INFO L124 PetriNetUnfolderBase]: 5920/8382 cut-off events. [2024-11-19 09:51:57,097 INFO L125 PetriNetUnfolderBase]: For 19432/20583 co-relation queries the response was YES. [2024-11-19 09:51:57,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30224 conditions, 8382 events. 5920/8382 cut-off events. For 19432/20583 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 43007 event pairs, 1307 based on Foata normal form. 787/9064 useless extension candidates. Maximal degree in co-relation 22284. Up to 2720 conditions per place. [2024-11-19 09:51:57,133 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 132 selfloop transitions, 14 changer transitions 0/152 dead transitions. [2024-11-19 09:51:57,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 152 transitions, 1230 flow [2024-11-19 09:51:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-11-19 09:51:57,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2024-11-19 09:51:57,134 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 414 flow. Second operand 7 states and 132 transitions. [2024-11-19 09:51:57,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 152 transitions, 1230 flow [2024-11-19 09:51:57,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 152 transitions, 1207 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:57,152 INFO L231 Difference]: Finished difference. Result has 89 places, 68 transitions, 439 flow [2024-11-19 09:51:57,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=89, PETRI_TRANSITIONS=68} [2024-11-19 09:51:57,152 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-11-19 09:51:57,152 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 68 transitions, 439 flow [2024-11-19 09:51:57,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.61111111111111) internal successors, (209), 18 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:57,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:57,153 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:57,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 09:51:57,353 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 [2024-11-19 09:51:57,353 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:57,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash -614844787, now seen corresponding path program 2 times [2024-11-19 09:51:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261699081] [2024-11-19 09:51:57,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:57,364 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:57,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:51:57,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:57,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261699081] [2024-11-19 09:51:57,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261699081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:57,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47972271] [2024-11-19 09:51:57,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:57,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:57,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:57,493 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) [2024-11-19 09:51:57,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:51:57,550 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:57,551 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:57,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:51:57,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:57,557 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 [2024-11-19 09:51:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:57,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:57,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47972271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:57,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:57,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2024-11-19 09:51:57,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122533446] [2024-11-19 09:51:57,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:57,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 09:51:57,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 09:51:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-19 09:51:57,937 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-19 09:51:57,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 68 transitions, 439 flow. Second operand has 21 states, 21 states have (on average 10.238095238095237) internal successors, (215), 21 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:57,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:57,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-19 09:51:57,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:59,229 INFO L124 PetriNetUnfolderBase]: 7138/9900 cut-off events. [2024-11-19 09:51:59,229 INFO L125 PetriNetUnfolderBase]: For 25660/26130 co-relation queries the response was YES. [2024-11-19 09:51:59,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37658 conditions, 9900 events. 7138/9900 cut-off events. For 25660/26130 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 50366 event pairs, 1176 based on Foata normal form. 299/9781 useless extension candidates. Maximal degree in co-relation 24611. Up to 1533 conditions per place. [2024-11-19 09:51:59,272 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 213 selfloop transitions, 22 changer transitions 0/241 dead transitions. [2024-11-19 09:51:59,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 241 transitions, 1843 flow [2024-11-19 09:51:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 09:51:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 09:51:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 308 transitions. [2024-11-19 09:51:59,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3623529411764706 [2024-11-19 09:51:59,274 INFO L175 Difference]: Start difference. First operand has 89 places, 68 transitions, 439 flow. Second operand 17 states and 308 transitions. [2024-11-19 09:51:59,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 241 transitions, 1843 flow [2024-11-19 09:51:59,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 241 transitions, 1711 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-11-19 09:51:59,322 INFO L231 Difference]: Finished difference. Result has 100 places, 70 transitions, 469 flow [2024-11-19 09:51:59,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=469, PETRI_PLACES=100, PETRI_TRANSITIONS=70} [2024-11-19 09:51:59,323 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 48 predicate places. [2024-11-19 09:51:59,323 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 70 transitions, 469 flow [2024-11-19 09:51:59,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.238095238095237) internal successors, (215), 21 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:59,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:59,323 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] [2024-11-19 09:51:59,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:59,527 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 [2024-11-19 09:51:59,528 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:59,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1371332543, now seen corresponding path program 1 times [2024-11-19 09:51:59,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:59,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285443159] [2024-11-19 09:51:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:59,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:59,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:59,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285443159] [2024-11-19 09:51:59,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285443159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:59,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:59,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:59,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634820604] [2024-11-19 09:51:59,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:59,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:59,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:59,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:51:59,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 70 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:59,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:59,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:51:59,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:00,172 INFO L124 PetriNetUnfolderBase]: 5729/8554 cut-off events. [2024-11-19 09:52:00,172 INFO L125 PetriNetUnfolderBase]: For 24090/24532 co-relation queries the response was YES. [2024-11-19 09:52:00,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32306 conditions, 8554 events. 5729/8554 cut-off events. For 24090/24532 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 46257 event pairs, 1405 based on Foata normal form. 62/8519 useless extension candidates. Maximal degree in co-relation 25025. Up to 7165 conditions per place. [2024-11-19 09:52:00,224 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 80 selfloop transitions, 5 changer transitions 1/95 dead transitions. [2024-11-19 09:52:00,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 792 flow [2024-11-19 09:52:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:52:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:52:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-19 09:52:00,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-11-19 09:52:00,226 INFO L175 Difference]: Start difference. First operand has 100 places, 70 transitions, 469 flow. Second operand 3 states and 74 transitions. [2024-11-19 09:52:00,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 792 flow [2024-11-19 09:52:00,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 672 flow, removed 15 selfloop flow, removed 18 redundant places. [2024-11-19 09:52:00,269 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 410 flow [2024-11-19 09:52:00,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=410, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2024-11-19 09:52:00,269 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-11-19 09:52:00,270 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 410 flow [2024-11-19 09:52:00,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:00,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:00,270 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] [2024-11-19 09:52:00,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 09:52:00,270 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:00,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash 570927113, now seen corresponding path program 1 times [2024-11-19 09:52:00,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:00,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900192845] [2024-11-19 09:52:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:00,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:00,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900192845] [2024-11-19 09:52:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900192845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632321730] [2024-11-19 09:52:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:00,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:00,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:00,342 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) [2024-11-19 09:52:00,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:52:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:00,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:52:00,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:00,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632321730] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:00,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:52:00,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-19 09:52:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683450696] [2024-11-19 09:52:00,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:00,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:52:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:52:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:52:00,460 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:52:00,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:00,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:00,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:52:00,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:01,080 INFO L124 PetriNetUnfolderBase]: 6507/9405 cut-off events. [2024-11-19 09:52:01,080 INFO L125 PetriNetUnfolderBase]: For 19788/20361 co-relation queries the response was YES. [2024-11-19 09:52:01,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34007 conditions, 9405 events. 6507/9405 cut-off events. For 19788/20361 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 48959 event pairs, 1838 based on Foata normal form. 284/9474 useless extension candidates. Maximal degree in co-relation 26126. Up to 5378 conditions per place. [2024-11-19 09:52:01,117 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 86 selfloop transitions, 10 changer transitions 0/102 dead transitions. [2024-11-19 09:52:01,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 102 transitions, 765 flow [2024-11-19 09:52:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:52:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:52:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-19 09:52:01,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-11-19 09:52:01,118 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 410 flow. Second operand 5 states and 88 transitions. [2024-11-19 09:52:01,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 102 transitions, 765 flow [2024-11-19 09:52:01,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 102 transitions, 756 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:52:01,138 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 423 flow [2024-11-19 09:52:01,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-11-19 09:52:01,139 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-11-19 09:52:01,139 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 423 flow [2024-11-19 09:52:01,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:01,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:01,139 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] [2024-11-19 09:52:01,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:52:01,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 09:52:01,340 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:01,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash -396542449, now seen corresponding path program 1 times [2024-11-19 09:52:01,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:01,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983013494] [2024-11-19 09:52:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:01,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:01,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:01,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983013494] [2024-11-19 09:52:01,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983013494] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:01,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352674730] [2024-11-19 09:52:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:01,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:01,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:01,375 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) [2024-11-19 09:52:01,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:52:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:01,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 09:52:01,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:01,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:01,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352674730] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:01,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:01,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-19 09:52:01,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356429948] [2024-11-19 09:52:01,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:01,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:52:01,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:01,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:52:01,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:52:01,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:52:01,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 423 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:01,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:01,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:52:01,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:02,039 INFO L124 PetriNetUnfolderBase]: 6166/8932 cut-off events. [2024-11-19 09:52:02,039 INFO L125 PetriNetUnfolderBase]: For 26457/27157 co-relation queries the response was YES. [2024-11-19 09:52:02,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33734 conditions, 8932 events. 6166/8932 cut-off events. For 26457/27157 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 47860 event pairs, 1903 based on Foata normal form. 369/8937 useless extension candidates. Maximal degree in co-relation 25947. Up to 4748 conditions per place. [2024-11-19 09:52:02,090 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 82 selfloop transitions, 9 changer transitions 0/99 dead transitions. [2024-11-19 09:52:02,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 783 flow [2024-11-19 09:52:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:52:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:52:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-19 09:52:02,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-19 09:52:02,091 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 423 flow. Second operand 4 states and 76 transitions. [2024-11-19 09:52:02,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 783 flow [2024-11-19 09:52:02,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 99 transitions, 762 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:02,128 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 414 flow [2024-11-19 09:52:02,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=414, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2024-11-19 09:52:02,129 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-11-19 09:52:02,129 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 414 flow [2024-11-19 09:52:02,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:02,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:02,129 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] [2024-11-19 09:52:02,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:02,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 09:52:02,333 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:02,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:02,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1065110911, now seen corresponding path program 1 times [2024-11-19 09:52:02,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:02,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617431985] [2024-11-19 09:52:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:02,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:02,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617431985] [2024-11-19 09:52:02,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617431985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668973208] [2024-11-19 09:52:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:02,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:02,668 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) [2024-11-19 09:52:02,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:52:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:02,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-19 09:52:02,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:02,765 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 [2024-11-19 09:52:03,085 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 85 treesize of output 61 [2024-11-19 09:52:03,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-19 09:52:03,092 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 57 treesize of output 53 [2024-11-19 09:52:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:03,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:03,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-19 09:52:03,400 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 131 treesize of output 127 [2024-11-19 09:52:03,785 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 53 treesize of output 47 [2024-11-19 09:52:03,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:03,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2024-11-19 09:52:03,848 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 72 treesize of output 64 [2024-11-19 09:52:03,857 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:52:03,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2024-11-19 09:52:03,953 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 66 treesize of output 58 [2024-11-19 09:52:03,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:52:03,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2024-11-19 09:52:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:04,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668973208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:04,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:04,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-19 09:52:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951174704] [2024-11-19 09:52:04,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:04,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 09:52:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 09:52:04,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:52:04,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:52:04,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 414 flow. Second operand has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 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) [2024-11-19 09:52:04,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:04,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:52:04,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:05,733 INFO L124 PetriNetUnfolderBase]: 5071/7745 cut-off events. [2024-11-19 09:52:05,734 INFO L125 PetriNetUnfolderBase]: For 21399/21979 co-relation queries the response was YES. [2024-11-19 09:52:05,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29720 conditions, 7745 events. 5071/7745 cut-off events. For 21399/21979 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 43299 event pairs, 1521 based on Foata normal form. 95/7749 useless extension candidates. Maximal degree in co-relation 23071. Up to 6432 conditions per place. [2024-11-19 09:52:05,773 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 83 selfloop transitions, 19 changer transitions 47/159 dead transitions. [2024-11-19 09:52:05,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 159 transitions, 1169 flow [2024-11-19 09:52:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 09:52:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 09:52:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-11-19 09:52:05,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-19 09:52:05,775 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 414 flow. Second operand 16 states and 284 transitions. [2024-11-19 09:52:05,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 159 transitions, 1169 flow [2024-11-19 09:52:05,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1139 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:05,812 INFO L231 Difference]: Finished difference. Result has 109 places, 76 transitions, 512 flow [2024-11-19 09:52:05,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=512, PETRI_PLACES=109, PETRI_TRANSITIONS=76} [2024-11-19 09:52:05,812 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-11-19 09:52:05,812 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 76 transitions, 512 flow [2024-11-19 09:52:05,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 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) [2024-11-19 09:52:05,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:05,813 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] [2024-11-19 09:52:05,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:06,013 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 [2024-11-19 09:52:06,013 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:06,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:06,014 INFO L85 PathProgramCache]: Analyzing trace with hash 613400421, now seen corresponding path program 2 times [2024-11-19 09:52:06,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:06,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571116649] [2024-11-19 09:52:06,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:06,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:06,030 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:06,034 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:06,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:06,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571116649] [2024-11-19 09:52:06,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571116649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:06,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199180143] [2024-11-19 09:52:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:06,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:06,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:06,405 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) [2024-11-19 09:52:06,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:52:06,462 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:06,462 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:06,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 09:52:06,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:06,495 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 [2024-11-19 09:52:06,691 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 75 treesize of output 51 [2024-11-19 09:52:06,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:06,695 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 47 treesize of output 43 [2024-11-19 09:52:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:06,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:06,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-19 09:52:06,849 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 131 treesize of output 127 [2024-11-19 09:52:07,491 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 117 treesize of output 105 [2024-11-19 09:52:07,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:07,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-11-19 09:52:08,021 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 100 treesize of output 92 [2024-11-19 09:52:08,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:08,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2024-11-19 09:52:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199180143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:08,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:08,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-19 09:52:08,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965568686] [2024-11-19 09:52:08,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:08,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:52:08,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:52:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:52:08,924 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:52:08,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 76 transitions, 512 flow. Second operand has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:52:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:10,873 INFO L124 PetriNetUnfolderBase]: 5353/8248 cut-off events. [2024-11-19 09:52:10,873 INFO L125 PetriNetUnfolderBase]: For 24957/25491 co-relation queries the response was YES. [2024-11-19 09:52:10,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31967 conditions, 8248 events. 5353/8248 cut-off events. For 24957/25491 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 47651 event pairs, 1704 based on Foata normal form. 91/8242 useless extension candidates. Maximal degree in co-relation 31928. Up to 6532 conditions per place. [2024-11-19 09:52:10,916 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 118 selfloop transitions, 76 changer transitions 38/242 dead transitions. [2024-11-19 09:52:10,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 242 transitions, 1990 flow [2024-11-19 09:52:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 09:52:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 09:52:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 512 transitions. [2024-11-19 09:52:10,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-11-19 09:52:10,918 INFO L175 Difference]: Start difference. First operand has 109 places, 76 transitions, 512 flow. Second operand 32 states and 512 transitions. [2024-11-19 09:52:10,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 242 transitions, 1990 flow [2024-11-19 09:52:10,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 242 transitions, 1889 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-11-19 09:52:10,965 INFO L231 Difference]: Finished difference. Result has 143 places, 135 transitions, 1214 flow [2024-11-19 09:52:10,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1214, PETRI_PLACES=143, PETRI_TRANSITIONS=135} [2024-11-19 09:52:10,965 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 91 predicate places. [2024-11-19 09:52:10,965 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 135 transitions, 1214 flow [2024-11-19 09:52:10,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:10,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:10,966 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] [2024-11-19 09:52:10,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:11,166 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 [2024-11-19 09:52:11,166 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:11,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1566684683, now seen corresponding path program 3 times [2024-11-19 09:52:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:11,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610895670] [2024-11-19 09:52:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:11,188 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:52:11,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:11,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:11,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610895670] [2024-11-19 09:52:11,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610895670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:11,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111631279] [2024-11-19 09:52:11,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:11,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:11,544 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) [2024-11-19 09:52:11,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:52:11,607 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:52:11,608 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:11,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 09:52:11,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:11,654 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 [2024-11-19 09:52:11,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 51 [2024-11-19 09:52:11,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:11,875 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 47 treesize of output 43 [2024-11-19 09:52:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:11,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:12,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-19 09:52:12,011 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 131 treesize of output 127 [2024-11-19 09:52:12,607 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 66 treesize of output 58 [2024-11-19 09:52:12,616 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:52:12,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 79 [2024-11-19 09:52:12,652 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 53 treesize of output 47 [2024-11-19 09:52:12,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:12,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2024-11-19 09:52:12,714 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 72 treesize of output 64 [2024-11-19 09:52:12,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:12,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 82 [2024-11-19 09:52:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111631279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:12,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:12,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-19 09:52:12,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625313063] [2024-11-19 09:52:12,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:12,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:52:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:52:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:52:13,076 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:52:13,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 135 transitions, 1214 flow. Second operand has 25 states, 25 states have (on average 12.64) internal successors, (316), 25 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:13,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:13,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:52:13,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:15,047 INFO L124 PetriNetUnfolderBase]: 5732/8946 cut-off events. [2024-11-19 09:52:15,047 INFO L125 PetriNetUnfolderBase]: For 37858/38448 co-relation queries the response was YES. [2024-11-19 09:52:15,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39202 conditions, 8946 events. 5732/8946 cut-off events. For 37858/38448 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 53727 event pairs, 1615 based on Foata normal form. 75/8928 useless extension candidates. Maximal degree in co-relation 39131. Up to 7034 conditions per place. [2024-11-19 09:52:15,107 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 170 selfloop transitions, 92 changer transitions 41/313 dead transitions. [2024-11-19 09:52:15,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 313 transitions, 3125 flow [2024-11-19 09:52:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 09:52:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 09:52:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 527 transitions. [2024-11-19 09:52:15,108 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.329375 [2024-11-19 09:52:15,108 INFO L175 Difference]: Start difference. First operand has 143 places, 135 transitions, 1214 flow. Second operand 32 states and 527 transitions. [2024-11-19 09:52:15,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 313 transitions, 3125 flow [2024-11-19 09:52:15,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 313 transitions, 2963 flow, removed 51 selfloop flow, removed 11 redundant places. [2024-11-19 09:52:15,195 INFO L231 Difference]: Finished difference. Result has 170 places, 186 transitions, 1940 flow [2024-11-19 09:52:15,195 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1940, PETRI_PLACES=170, PETRI_TRANSITIONS=186} [2024-11-19 09:52:15,195 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-11-19 09:52:15,195 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 186 transitions, 1940 flow [2024-11-19 09:52:15,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.64) internal successors, (316), 25 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:15,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:15,196 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] [2024-11-19 09:52:15,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:15,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:15,396 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:15,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1031207271, now seen corresponding path program 4 times [2024-11-19 09:52:15,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:15,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004891543] [2024-11-19 09:52:15,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:15,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:15,408 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:15,409 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:15,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:15,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004891543] [2024-11-19 09:52:15,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004891543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:15,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169201512] [2024-11-19 09:52:15,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:15,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:15,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:15,741 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:15,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:52:15,803 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:15,803 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:15,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 09:52:15,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:15,842 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 [2024-11-19 09:52:16,039 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 75 treesize of output 51 [2024-11-19 09:52:16,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:16,042 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 47 treesize of output 43 [2024-11-19 09:52:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:16,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:16,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-19 09:52:16,162 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 131 treesize of output 127 [2024-11-19 09:52:16,971 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 100 treesize of output 92 [2024-11-19 09:52:16,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:16,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2024-11-19 09:52:17,657 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 117 treesize of output 105 [2024-11-19 09:52:17,665 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-19 09:52:17,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2024-11-19 09:52:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:17,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169201512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:17,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:17,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-19 09:52:17,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140395029] [2024-11-19 09:52:17,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:17,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:52:17,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:52:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:52:17,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:52:17,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 186 transitions, 1940 flow. Second operand has 25 states, 25 states have (on average 11.64) internal successors, (291), 25 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:17,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:17,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:52:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:20,225 INFO L124 PetriNetUnfolderBase]: 7026/10555 cut-off events. [2024-11-19 09:52:20,225 INFO L125 PetriNetUnfolderBase]: For 52864/53249 co-relation queries the response was YES. [2024-11-19 09:52:20,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49395 conditions, 10555 events. 7026/10555 cut-off events. For 52864/53249 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 61210 event pairs, 2505 based on Foata normal form. 113/10390 useless extension candidates. Maximal degree in co-relation 49316. Up to 9024 conditions per place. [2024-11-19 09:52:20,303 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 153 selfloop transitions, 90 changer transitions 55/305 dead transitions. [2024-11-19 09:52:20,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 305 transitions, 3288 flow [2024-11-19 09:52:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 09:52:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 09:52:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 472 transitions. [2024-11-19 09:52:20,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.295 [2024-11-19 09:52:20,305 INFO L175 Difference]: Start difference. First operand has 170 places, 186 transitions, 1940 flow. Second operand 32 states and 472 transitions. [2024-11-19 09:52:20,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 305 transitions, 3288 flow [2024-11-19 09:52:20,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 305 transitions, 3071 flow, removed 68 selfloop flow, removed 10 redundant places. [2024-11-19 09:52:20,434 INFO L231 Difference]: Finished difference. Result has 194 places, 194 transitions, 2025 flow [2024-11-19 09:52:20,434 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2025, PETRI_PLACES=194, PETRI_TRANSITIONS=194} [2024-11-19 09:52:20,434 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 142 predicate places. [2024-11-19 09:52:20,435 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 194 transitions, 2025 flow [2024-11-19 09:52:20,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.64) internal successors, (291), 25 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:20,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:20,435 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] [2024-11-19 09:52:20,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 09:52:20,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-19 09:52:20,635 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:20,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:20,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1686320081, now seen corresponding path program 5 times [2024-11-19 09:52:20,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:20,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555428526] [2024-11-19 09:52:20,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:52:20,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:20,646 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:20,647 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:21,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:21,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555428526] [2024-11-19 09:52:21,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555428526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:21,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606045732] [2024-11-19 09:52:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:52:21,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:21,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:21,100 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:21,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 09:52:21,161 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:21,162 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:21,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 09:52:21,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:21,196 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 [2024-11-19 09:52:21,375 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 75 treesize of output 51 [2024-11-19 09:52:21,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:21,378 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 47 treesize of output 43 [2024-11-19 09:52:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:21,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:21,502 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 128 treesize of output 124 [2024-11-19 09:52:21,505 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 124 treesize of output 120 [2024-11-19 09:52:22,240 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 66 treesize of output 58 [2024-11-19 09:52:22,249 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:52:22,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 79 [2024-11-19 09:52:22,276 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 53 treesize of output 47 [2024-11-19 09:52:22,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:22,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2024-11-19 09:52:22,339 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 72 treesize of output 64 [2024-11-19 09:52:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:52:22,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2024-11-19 09:52:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606045732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:22,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:22,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-19 09:52:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416145382] [2024-11-19 09:52:22,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:22,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 09:52:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 09:52:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2024-11-19 09:52:22,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:52:22,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 194 transitions, 2025 flow. Second operand has 24 states, 24 states have (on average 11.875) internal successors, (285), 24 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:22,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:22,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:52:22,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:24,418 INFO L124 PetriNetUnfolderBase]: 7169/10866 cut-off events. [2024-11-19 09:52:24,418 INFO L125 PetriNetUnfolderBase]: For 54581/55220 co-relation queries the response was YES. [2024-11-19 09:52:24,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51062 conditions, 10866 events. 7169/10866 cut-off events. For 54581/55220 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 63723 event pairs, 2575 based on Foata normal form. 105/10496 useless extension candidates. Maximal degree in co-relation 50973. Up to 9537 conditions per place. [2024-11-19 09:52:24,489 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 156 selfloop transitions, 45 changer transitions 40/249 dead transitions. [2024-11-19 09:52:24,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 249 transitions, 2938 flow [2024-11-19 09:52:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:52:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:52:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 222 transitions. [2024-11-19 09:52:24,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3171428571428571 [2024-11-19 09:52:24,490 INFO L175 Difference]: Start difference. First operand has 194 places, 194 transitions, 2025 flow. Second operand 14 states and 222 transitions. [2024-11-19 09:52:24,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 249 transitions, 2938 flow [2024-11-19 09:52:24,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 249 transitions, 2721 flow, removed 59 selfloop flow, removed 17 redundant places. [2024-11-19 09:52:24,613 INFO L231 Difference]: Finished difference. Result has 187 places, 194 transitions, 1942 flow [2024-11-19 09:52:24,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1942, PETRI_PLACES=187, PETRI_TRANSITIONS=194} [2024-11-19 09:52:24,613 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 135 predicate places. [2024-11-19 09:52:24,613 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 194 transitions, 1942 flow [2024-11-19 09:52:24,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.875) internal successors, (285), 24 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:24,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:24,614 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] [2024-11-19 09:52:24,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:24,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:24,814 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:24,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1844277771, now seen corresponding path program 6 times [2024-11-19 09:52:24,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:24,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76590459] [2024-11-19 09:52:24,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:52:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:24,825 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 09:52:24,825 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:25,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:25,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76590459] [2024-11-19 09:52:25,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76590459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:25,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272190532] [2024-11-19 09:52:25,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:52:25,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:25,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:25,040 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 09:52:25,096 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 09:52:25,096 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:25,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 09:52:25,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:25,122 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 [2024-11-19 09:52:25,294 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 75 treesize of output 51 [2024-11-19 09:52:25,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:25,298 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 47 treesize of output 43 [2024-11-19 09:52:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:25,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:25,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-19 09:52:25,426 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 131 treesize of output 127 [2024-11-19 09:52:25,994 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 100 treesize of output 92 [2024-11-19 09:52:26,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:26,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2024-11-19 09:52:26,552 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 117 treesize of output 105 [2024-11-19 09:52:26,559 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-19 09:52:26,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2024-11-19 09:52:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:26,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272190532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:26,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:26,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-19 09:52:26,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507142104] [2024-11-19 09:52:26,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:26,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 09:52:26,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 09:52:26,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-11-19 09:52:26,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:52:26,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 194 transitions, 1942 flow. Second operand has 24 states, 24 states have (on average 12.75) internal successors, (306), 24 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:26,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:26,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:52:26,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:28,815 INFO L124 PetriNetUnfolderBase]: 5641/8886 cut-off events. [2024-11-19 09:52:28,815 INFO L125 PetriNetUnfolderBase]: For 46821/47448 co-relation queries the response was YES. [2024-11-19 09:52:28,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42342 conditions, 8886 events. 5641/8886 cut-off events. For 46821/47448 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 54800 event pairs, 1863 based on Foata normal form. 103/8861 useless extension candidates. Maximal degree in co-relation 42249. Up to 7119 conditions per place. [2024-11-19 09:52:28,869 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 156 selfloop transitions, 93 changer transitions 40/299 dead transitions. [2024-11-19 09:52:28,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 299 transitions, 3252 flow [2024-11-19 09:52:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-19 09:52:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-19 09:52:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 469 transitions. [2024-11-19 09:52:28,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31266666666666665 [2024-11-19 09:52:28,871 INFO L175 Difference]: Start difference. First operand has 187 places, 194 transitions, 1942 flow. Second operand 30 states and 469 transitions. [2024-11-19 09:52:28,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 299 transitions, 3252 flow [2024-11-19 09:52:28,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 299 transitions, 3130 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-11-19 09:52:28,969 INFO L231 Difference]: Finished difference. Result has 200 places, 195 transitions, 2008 flow [2024-11-19 09:52:28,969 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2008, PETRI_PLACES=200, PETRI_TRANSITIONS=195} [2024-11-19 09:52:28,970 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 148 predicate places. [2024-11-19 09:52:28,970 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 195 transitions, 2008 flow [2024-11-19 09:52:28,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.75) internal successors, (306), 24 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:28,970 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:28,970 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] [2024-11-19 09:52:28,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:29,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:29,171 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:29,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash 668091957, now seen corresponding path program 7 times [2024-11-19 09:52:29,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:29,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387473684] [2024-11-19 09:52:29,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:52:29,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:29,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387473684] [2024-11-19 09:52:29,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387473684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045674424] [2024-11-19 09:52:29,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:52:29,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:29,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:29,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 09:52:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:29,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 09:52:29,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:29,569 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 [2024-11-19 09:52:29,756 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 75 treesize of output 51 [2024-11-19 09:52:29,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:29,759 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 47 treesize of output 43 [2024-11-19 09:52:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:29,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:29,936 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 116 treesize of output 112 [2024-11-19 09:52:29,938 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 112 treesize of output 108 [2024-11-19 09:52:30,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-11-19 09:52:30,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:30,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-11-19 09:52:30,934 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 100 treesize of output 92 [2024-11-19 09:52:30,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:30,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2024-11-19 09:52:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:31,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045674424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:31,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:31,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-19 09:52:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193293563] [2024-11-19 09:52:31,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:31,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 09:52:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 09:52:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-19 09:52:31,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:52:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 195 transitions, 2008 flow. Second operand has 22 states, 22 states have (on average 12.954545454545455) internal successors, (285), 22 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:31,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:31,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:52:31,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:32,990 INFO L124 PetriNetUnfolderBase]: 5613/8793 cut-off events. [2024-11-19 09:52:32,990 INFO L125 PetriNetUnfolderBase]: For 50241/50912 co-relation queries the response was YES. [2024-11-19 09:52:33,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42712 conditions, 8793 events. 5613/8793 cut-off events. For 50241/50912 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 53828 event pairs, 1912 based on Foata normal form. 125/8799 useless extension candidates. Maximal degree in co-relation 42657. Up to 7415 conditions per place. [2024-11-19 09:52:33,055 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 142 selfloop transitions, 37 changer transitions 62/250 dead transitions. [2024-11-19 09:52:33,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 250 transitions, 2852 flow [2024-11-19 09:52:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 09:52:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 09:52:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 282 transitions. [2024-11-19 09:52:33,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33176470588235296 [2024-11-19 09:52:33,056 INFO L175 Difference]: Start difference. First operand has 200 places, 195 transitions, 2008 flow. Second operand 17 states and 282 transitions. [2024-11-19 09:52:33,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 250 transitions, 2852 flow [2024-11-19 09:52:33,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 250 transitions, 2624 flow, removed 41 selfloop flow, removed 21 redundant places. [2024-11-19 09:52:33,261 INFO L231 Difference]: Finished difference. Result has 190 places, 173 transitions, 1667 flow [2024-11-19 09:52:33,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1667, PETRI_PLACES=190, PETRI_TRANSITIONS=173} [2024-11-19 09:52:33,262 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 138 predicate places. [2024-11-19 09:52:33,262 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 173 transitions, 1667 flow [2024-11-19 09:52:33,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.954545454545455) internal successors, (285), 22 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:33,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:33,262 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:33,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-19 09:52:33,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:33,462 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:33,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:33,463 INFO L85 PathProgramCache]: Analyzing trace with hash -108882627, now seen corresponding path program 8 times [2024-11-19 09:52:33,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:33,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459300712] [2024-11-19 09:52:33,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:33,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:33,472 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:33,472 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:33,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:33,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459300712] [2024-11-19 09:52:33,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459300712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:33,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707987056] [2024-11-19 09:52:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:33,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:33,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:33,524 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:33,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 09:52:33,589 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:33,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:33,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:33,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:33,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:33,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707987056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:33,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:33,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:52:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923755169] [2024-11-19 09:52:33,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:33,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:52:33,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:52:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:52:33,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:52:33,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 173 transitions, 1667 flow. Second operand has 14 states, 14 states have (on average 12.142857142857142) internal successors, (170), 14 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:33,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:33,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:52:33,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:34,556 INFO L124 PetriNetUnfolderBase]: 6213/9270 cut-off events. [2024-11-19 09:52:34,557 INFO L125 PetriNetUnfolderBase]: For 46340/47201 co-relation queries the response was YES. [2024-11-19 09:52:34,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44972 conditions, 9270 events. 6213/9270 cut-off events. For 46340/47201 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 52926 event pairs, 1092 based on Foata normal form. 308/9541 useless extension candidates. Maximal degree in co-relation 44916. Up to 2768 conditions per place. [2024-11-19 09:52:34,623 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 209 selfloop transitions, 31 changer transitions 0/246 dead transitions. [2024-11-19 09:52:34,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 246 transitions, 2650 flow [2024-11-19 09:52:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:52:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:52:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-11-19 09:52:34,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3488888888888889 [2024-11-19 09:52:34,624 INFO L175 Difference]: Start difference. First operand has 190 places, 173 transitions, 1667 flow. Second operand 9 states and 157 transitions. [2024-11-19 09:52:34,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 246 transitions, 2650 flow [2024-11-19 09:52:34,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 246 transitions, 2474 flow, removed 37 selfloop flow, removed 19 redundant places. [2024-11-19 09:52:34,735 INFO L231 Difference]: Finished difference. Result has 157 places, 172 transitions, 1579 flow [2024-11-19 09:52:34,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1579, PETRI_PLACES=157, PETRI_TRANSITIONS=172} [2024-11-19 09:52:34,735 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 105 predicate places. [2024-11-19 09:52:34,735 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 172 transitions, 1579 flow [2024-11-19 09:52:34,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.142857142857142) internal successors, (170), 14 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:34,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:34,736 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:34,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:34,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 09:52:34,936 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:34,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -212542563, now seen corresponding path program 9 times [2024-11-19 09:52:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:34,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658487826] [2024-11-19 09:52:34,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:34,946 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 09:52:34,946 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:52:35,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:35,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658487826] [2024-11-19 09:52:35,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658487826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:35,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266069823] [2024-11-19 09:52:35,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:35,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:35,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:35,017 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:35,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 09:52:35,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 09:52:35,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:35,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:52:35,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:52:35,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:52:35,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266069823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:35,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:35,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-19 09:52:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484816777] [2024-11-19 09:52:35,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:35,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:52:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:52:35,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:52:35,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-19 09:52:35,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 172 transitions, 1579 flow. Second operand has 19 states, 19 states have (on average 10.842105263157896) internal successors, (206), 19 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:35,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:35,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-19 09:52:35,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:37,264 INFO L124 PetriNetUnfolderBase]: 12513/18015 cut-off events. [2024-11-19 09:52:37,264 INFO L125 PetriNetUnfolderBase]: For 112776/112988 co-relation queries the response was YES. [2024-11-19 09:52:37,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87730 conditions, 18015 events. 12513/18015 cut-off events. For 112776/112988 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 105852 event pairs, 1748 based on Foata normal form. 212/17146 useless extension candidates. Maximal degree in co-relation 87686. Up to 4918 conditions per place. [2024-11-19 09:52:37,412 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 356 selfloop transitions, 109 changer transitions 0/469 dead transitions. [2024-11-19 09:52:37,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 469 transitions, 5388 flow [2024-11-19 09:52:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 09:52:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-19 09:52:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 314 transitions. [2024-11-19 09:52:37,413 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3488888888888889 [2024-11-19 09:52:37,413 INFO L175 Difference]: Start difference. First operand has 157 places, 172 transitions, 1579 flow. Second operand 18 states and 314 transitions. [2024-11-19 09:52:37,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 469 transitions, 5388 flow [2024-11-19 09:52:37,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 469 transitions, 5186 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 09:52:37,685 INFO L231 Difference]: Finished difference. Result has 172 places, 241 transitions, 2404 flow [2024-11-19 09:52:37,685 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2404, PETRI_PLACES=172, PETRI_TRANSITIONS=241} [2024-11-19 09:52:37,686 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-11-19 09:52:37,686 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 241 transitions, 2404 flow [2024-11-19 09:52:37,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.842105263157896) internal successors, (206), 19 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:37,686 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:37,686 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:37,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:37,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 09:52:37,886 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:37,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:37,887 INFO L85 PathProgramCache]: Analyzing trace with hash 398512437, now seen corresponding path program 10 times [2024-11-19 09:52:37,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:37,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675728160] [2024-11-19 09:52:37,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:37,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:37,895 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:37,895 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:37,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:37,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675728160] [2024-11-19 09:52:37,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675728160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:37,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850862529] [2024-11-19 09:52:37,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:37,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:37,949 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:37,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 09:52:38,009 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:38,009 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:38,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:38,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:38,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:38,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850862529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:38,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:38,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-19 09:52:38,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385058642] [2024-11-19 09:52:38,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:38,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:52:38,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:52:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:52:38,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-11-19 09:52:38,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 241 transitions, 2404 flow. Second operand has 16 states, 16 states have (on average 9.8125) internal successors, (157), 16 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:38,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:38,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-11-19 09:52:38,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:42,358 INFO L124 PetriNetUnfolderBase]: 25131/35631 cut-off events. [2024-11-19 09:52:42,358 INFO L125 PetriNetUnfolderBase]: For 211763/211763 co-relation queries the response was YES. [2024-11-19 09:52:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180653 conditions, 35631 events. 25131/35631 cut-off events. For 211763/211763 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 209858 event pairs, 830 based on Foata normal form. 72/35703 useless extension candidates. Maximal degree in co-relation 180603. Up to 8352 conditions per place. [2024-11-19 09:52:42,678 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 490 selfloop transitions, 330 changer transitions 0/821 dead transitions. [2024-11-19 09:52:42,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 821 transitions, 9105 flow [2024-11-19 09:52:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-19 09:52:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-19 09:52:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 474 transitions. [2024-11-19 09:52:42,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3385714285714286 [2024-11-19 09:52:42,680 INFO L175 Difference]: Start difference. First operand has 172 places, 241 transitions, 2404 flow. Second operand 28 states and 474 transitions. [2024-11-19 09:52:42,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 821 transitions, 9105 flow [2024-11-19 09:52:44,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 821 transitions, 8865 flow, removed 116 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:44,837 INFO L231 Difference]: Finished difference. Result has 219 places, 526 transitions, 6222 flow [2024-11-19 09:52:44,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6222, PETRI_PLACES=219, PETRI_TRANSITIONS=526} [2024-11-19 09:52:44,837 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 167 predicate places. [2024-11-19 09:52:44,837 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 526 transitions, 6222 flow [2024-11-19 09:52:44,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.8125) internal successors, (157), 16 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:44,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:44,837 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:44,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:45,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 09:52:45,038 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:45,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:45,038 INFO L85 PathProgramCache]: Analyzing trace with hash 840012351, now seen corresponding path program 11 times [2024-11-19 09:52:45,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:45,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194036713] [2024-11-19 09:52:45,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:52:45,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:45,050 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 09:52:45,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:45,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:45,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194036713] [2024-11-19 09:52:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194036713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:45,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182510819] [2024-11-19 09:52:45,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:52:45,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:45,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:45,125 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:45,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-19 09:52:45,189 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 09:52:45,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:45,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:45,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:45,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:45,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182510819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:45,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:45,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-19 09:52:45,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060255079] [2024-11-19 09:52:45,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:45,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:52:45,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:52:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:52:45,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-11-19 09:52:45,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 526 transitions, 6222 flow. Second operand has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:45,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:45,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-11-19 09:52:45,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:53,229 INFO L124 PetriNetUnfolderBase]: 34303/48769 cut-off events. [2024-11-19 09:52:53,229 INFO L125 PetriNetUnfolderBase]: For 487718/487718 co-relation queries the response was YES. [2024-11-19 09:52:53,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294496 conditions, 48769 events. 34303/48769 cut-off events. For 487718/487718 co-relation queries the response was YES. Maximal size of possible extension queue 1392. Compared 303956 event pairs, 4490 based on Foata normal form. 28/48797 useless extension candidates. Maximal degree in co-relation 294423. Up to 11736 conditions per place. [2024-11-19 09:52:53,908 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 471 selfloop transitions, 447 changer transitions 0/919 dead transitions. [2024-11-19 09:52:53,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 919 transitions, 12333 flow [2024-11-19 09:52:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 09:52:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 09:52:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 321 transitions. [2024-11-19 09:52:53,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33789473684210525 [2024-11-19 09:52:53,910 INFO L175 Difference]: Start difference. First operand has 219 places, 526 transitions, 6222 flow. Second operand 19 states and 321 transitions. [2024-11-19 09:52:53,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 919 transitions, 12333 flow [2024-11-19 09:53:01,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 919 transitions, 12061 flow, removed 106 selfloop flow, removed 1 redundant places. [2024-11-19 09:53:01,265 INFO L231 Difference]: Finished difference. Result has 248 places, 717 transitions, 9789 flow [2024-11-19 09:53:01,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6066, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9789, PETRI_PLACES=248, PETRI_TRANSITIONS=717} [2024-11-19 09:53:01,266 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 196 predicate places. [2024-11-19 09:53:01,266 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 717 transitions, 9789 flow [2024-11-19 09:53:01,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:01,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:01,267 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:01,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-19 09:53:01,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:01,467 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:53:01,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2071558105, now seen corresponding path program 12 times [2024-11-19 09:53:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020917379] [2024-11-19 09:53:01,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:53:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:01,477 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 09:53:01,477 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:01,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:01,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020917379] [2024-11-19 09:53:01,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020917379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:01,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811520104] [2024-11-19 09:53:01,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:53:01,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:01,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:01,550 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:53:01,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-19 09:53:01,623 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 09:53:01,624 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:01,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:53:01,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:01,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:01,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811520104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:01,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:01,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-19 09:53:01,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131677871] [2024-11-19 09:53:01,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:01,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:53:01,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:53:01,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:53:01,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-19 09:53:01,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 717 transitions, 9789 flow. Second operand has 18 states, 18 states have (on average 10.722222222222221) internal successors, (193), 18 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:01,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:01,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-19 09:53:01,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:09,384 INFO L124 PetriNetUnfolderBase]: 27517/40497 cut-off events. [2024-11-19 09:53:09,384 INFO L125 PetriNetUnfolderBase]: For 565745/567397 co-relation queries the response was YES. [2024-11-19 09:53:09,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273105 conditions, 40497 events. 27517/40497 cut-off events. For 565745/567397 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 281937 event pairs, 3819 based on Foata normal form. 792/40539 useless extension candidates. Maximal degree in co-relation 273019. Up to 11844 conditions per place. [2024-11-19 09:53:09,913 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 451 selfloop transitions, 441 changer transitions 0/905 dead transitions. [2024-11-19 09:53:09,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 905 transitions, 13829 flow [2024-11-19 09:53:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 09:53:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 09:53:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-11-19 09:53:09,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3353846153846154 [2024-11-19 09:53:09,914 INFO L175 Difference]: Start difference. First operand has 248 places, 717 transitions, 9789 flow. Second operand 13 states and 218 transitions. [2024-11-19 09:53:09,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 905 transitions, 13829 flow