./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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/chl-array-int-trans.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 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:31:47,075 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:31:47,133 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:31:47,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:31:47,154 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:31:47,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:31:47,176 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:31:47,176 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:31:47,177 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:31:47,179 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:31:47,180 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:31:47,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:31:47,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:31:47,180 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:31:47,181 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:31:47,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:31:47,181 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:31:47,182 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:31:47,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:31:47,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:31:47,183 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:31:47,185 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:31:47,185 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:31:47,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:31:47,186 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:31:47,186 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:31:47,186 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:31:47,186 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:31:47,186 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:31:47,187 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:31:47,187 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:31:47,187 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:31:47,187 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:31:47,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:31:47,187 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:31:47,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:31:47,188 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:31:47,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:31:47,188 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:31:47,188 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:31:47,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:31:47,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:31:47,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2024-11-17 03:31:47,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:31:47,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:31:47,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:31:47,427 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:31:47,427 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:31:47,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2024-11-17 03:31:48,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:31:48,860 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:31:48,861 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2024-11-17 03:31:48,870 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d31b1d19c/fbbd3798b3564b1bb7946d8fba95d994/FLAGcdd953fb6 [2024-11-17 03:31:48,888 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d31b1d19c/fbbd3798b3564b1bb7946d8fba95d994 [2024-11-17 03:31:48,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:31:48,893 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:31:48,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:31:48,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:31:48,902 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:31:48,903 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:48" (1/1) ... [2024-11-17 03:31:48,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7f43c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:48, skipping insertion in model container [2024-11-17 03:31:48,904 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:48" (1/1) ... [2024-11-17 03:31:48,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:31:49,180 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:31:49,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:31:49,195 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:31:49,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:31:49,233 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:31:49,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49 WrapperNode [2024-11-17 03:31:49,234 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:31:49,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:31:49,235 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:31:49,235 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:31:49,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,253 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,275 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 266 [2024-11-17 03:31:49,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:31:49,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:31:49,276 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:31:49,276 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:31:49,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,289 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,301 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-17 03:31:49,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,310 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,313 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:31:49,321 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:31:49,321 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:31:49,321 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:31:49,322 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (1/1) ... [2024-11-17 03:31:49,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:31:49,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:49,364 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) [2024-11-17 03:31:49,367 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 [2024-11-17 03:31:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:31:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:31:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:31:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:31:49,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:31:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:31:49,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:31:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:31:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:31:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:31:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:31:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:31:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:31:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:31:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:31:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:31:49,411 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:31:49,528 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:31:49,530 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:31:49,955 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:31:49,955 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:31:50,210 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:31:50,210 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:31:50,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:31:50 BoogieIcfgContainer [2024-11-17 03:31:50,211 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:31:50,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:31:50,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:31:50,216 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:31:50,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:31:48" (1/3) ... [2024-11-17 03:31:50,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cac31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:31:50, skipping insertion in model container [2024-11-17 03:31:50,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:49" (2/3) ... [2024-11-17 03:31:50,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cac31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:31:50, skipping insertion in model container [2024-11-17 03:31:50,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:31:50" (3/3) ... [2024-11-17 03:31:50,219 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2024-11-17 03:31:50,238 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:31:50,238 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-17 03:31:50,239 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:31:50,305 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:31:50,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 102 transitions, 225 flow [2024-11-17 03:31:50,370 INFO L124 PetriNetUnfolderBase]: 15/99 cut-off events. [2024-11-17 03:31:50,370 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:31:50,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 99 events. 15/99 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 286 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 73. Up to 3 conditions per place. [2024-11-17 03:31:50,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 102 transitions, 225 flow [2024-11-17 03:31:50,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 98 transitions, 214 flow [2024-11-17 03:31:50,393 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:31:50,398 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;@3c9d5d23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:31:50,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-17 03:31:50,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:31:50,401 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:31:50,401 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:31:50,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:50,402 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:31:50,402 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:50,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash 24106727, now seen corresponding path program 1 times [2024-11-17 03:31:50,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:50,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392208924] [2024-11-17 03:31:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:50,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:50,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392208924] [2024-11-17 03:31:50,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392208924] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:50,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:50,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:31:50,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716342758] [2024-11-17 03:31:50,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:50,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:31:50,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:31:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:31:50,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-17 03:31:50,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2024-11-17 03:31:50,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:50,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-17 03:31:50,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:51,062 INFO L124 PetriNetUnfolderBase]: 911/1543 cut-off events. [2024-11-17 03:31:51,062 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-17 03:31:51,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2880 conditions, 1543 events. 911/1543 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8484 event pairs, 551 based on Foata normal form. 178/1260 useless extension candidates. Maximal degree in co-relation 2614. Up to 1231 conditions per place. [2024-11-17 03:31:51,079 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 33 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-17 03:31:51,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 262 flow [2024-11-17 03:31:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:31:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:31:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2024-11-17 03:31:51,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.696078431372549 [2024-11-17 03:31:51,093 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 214 flow. Second operand 3 states and 213 transitions. [2024-11-17 03:31:51,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 262 flow [2024-11-17 03:31:51,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 87 transitions, 250 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:51,104 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 184 flow [2024-11-17 03:31:51,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-11-17 03:31:51,110 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2024-11-17 03:31:51,111 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 184 flow [2024-11-17 03:31:51,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2024-11-17 03:31:51,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:51,112 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:31:51,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:31:51,112 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:51,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:51,113 INFO L85 PathProgramCache]: Analyzing trace with hash 24106728, now seen corresponding path program 1 times [2024-11-17 03:31:51,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:51,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472213034] [2024-11-17 03:31:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:51,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:51,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:51,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472213034] [2024-11-17 03:31:51,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472213034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:51,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:51,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:31:51,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487904181] [2024-11-17 03:31:51,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:51,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:31:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:31:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:31:51,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-17 03:31:51,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 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) [2024-11-17 03:31:51,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:51,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-17 03:31:51,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:51,706 INFO L124 PetriNetUnfolderBase]: 911/1542 cut-off events. [2024-11-17 03:31:51,706 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-17 03:31:51,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 1542 events. 911/1542 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8478 event pairs, 551 based on Foata normal form. 0/1079 useless extension candidates. Maximal degree in co-relation 2784. Up to 1239 conditions per place. [2024-11-17 03:31:51,713 INFO L140 encePairwiseOnDemand]: 97/102 looper letters, 33 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2024-11-17 03:31:51,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 256 flow [2024-11-17 03:31:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:31:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:31:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 262 transitions. [2024-11-17 03:31:51,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2024-11-17 03:31:51,717 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 184 flow. Second operand 4 states and 262 transitions. [2024-11-17 03:31:51,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 256 flow [2024-11-17 03:31:51,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:51,720 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 186 flow [2024-11-17 03:31:51,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-11-17 03:31:51,721 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2024-11-17 03:31:51,721 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 186 flow [2024-11-17 03:31:51,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 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) [2024-11-17 03:31:51,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:51,722 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:51,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:31:51,723 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:51,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash 902922654, now seen corresponding path program 1 times [2024-11-17 03:31:51,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:51,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801207873] [2024-11-17 03:31:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:51,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801207873] [2024-11-17 03:31:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801207873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:51,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:51,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:31:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281604820] [2024-11-17 03:31:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:51,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:51,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:51,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:52,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-17 03:31:52,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 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) [2024-11-17 03:31:52,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:52,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-17 03:31:52,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:52,248 INFO L124 PetriNetUnfolderBase]: 913/1552 cut-off events. [2024-11-17 03:31:52,248 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-17 03:31:52,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 1552 events. 913/1552 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8491 event pairs, 551 based on Foata normal form. 0/1089 useless extension candidates. Maximal degree in co-relation 2812. Up to 1242 conditions per place. [2024-11-17 03:31:52,256 INFO L140 encePairwiseOnDemand]: 94/102 looper letters, 36 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2024-11-17 03:31:52,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 92 transitions, 290 flow [2024-11-17 03:31:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:31:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:31:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 324 transitions. [2024-11-17 03:31:52,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6352941176470588 [2024-11-17 03:31:52,258 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 186 flow. Second operand 5 states and 324 transitions. [2024-11-17 03:31:52,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 92 transitions, 290 flow [2024-11-17 03:31:52,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 92 transitions, 276 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:31:52,264 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 231 flow [2024-11-17 03:31:52,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-11-17 03:31:52,266 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -5 predicate places. [2024-11-17 03:31:52,266 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 231 flow [2024-11-17 03:31:52,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 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) [2024-11-17 03:31:52,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:52,267 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:52,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:31:52,267 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:52,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -410674836, now seen corresponding path program 1 times [2024-11-17 03:31:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:52,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664469870] [2024-11-17 03:31:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:52,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:52,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664469870] [2024-11-17 03:31:52,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664469870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:52,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344774923] [2024-11-17 03:31:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:52,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:52,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:52,461 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) [2024-11-17 03:31:52,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:31:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:52,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:31:52,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:52,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:31:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:52,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:53,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344774923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:53,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:53,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:31:53,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779843310] [2024-11-17 03:31:53,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:53,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:31:53,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:53,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:31:53,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:31:53,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-17 03:31:53,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 231 flow. Second operand has 13 states, 13 states have (on average 54.46153846153846) internal successors, (708), 13 states have internal predecessors, (708), 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) [2024-11-17 03:31:53,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:53,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-17 03:31:53,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:54,298 INFO L124 PetriNetUnfolderBase]: 913/1551 cut-off events. [2024-11-17 03:31:54,298 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-17 03:31:54,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 1551 events. 913/1551 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8529 event pairs, 551 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 2811. Up to 1235 conditions per place. [2024-11-17 03:31:54,309 INFO L140 encePairwiseOnDemand]: 92/102 looper letters, 33 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-11-17 03:31:54,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 93 transitions, 325 flow [2024-11-17 03:31:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:31:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:31:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 472 transitions. [2024-11-17 03:31:54,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-11-17 03:31:54,311 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 231 flow. Second operand 8 states and 472 transitions. [2024-11-17 03:31:54,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 93 transitions, 325 flow [2024-11-17 03:31:54,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:54,312 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 254 flow [2024-11-17 03:31:54,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2024-11-17 03:31:54,314 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 0 predicate places. [2024-11-17 03:31:54,314 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 254 flow [2024-11-17 03:31:54,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.46153846153846) internal successors, (708), 13 states have internal predecessors, (708), 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) [2024-11-17 03:31:54,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:54,315 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:54,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:54,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:54,522 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:54,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -411260693, now seen corresponding path program 1 times [2024-11-17 03:31:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286185107] [2024-11-17 03:31:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:54,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286185107] [2024-11-17 03:31:54,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286185107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:54,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:54,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:31:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823169413] [2024-11-17 03:31:54,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:54,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:54,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:54,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-17 03:31:54,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 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) [2024-11-17 03:31:54,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:54,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-17 03:31:54,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:55,019 INFO L124 PetriNetUnfolderBase]: 914/1556 cut-off events. [2024-11-17 03:31:55,019 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-17 03:31:55,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 1556 events. 914/1556 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8543 event pairs, 551 based on Foata normal form. 0/1094 useless extension candidates. Maximal degree in co-relation 2822. Up to 1244 conditions per place. [2024-11-17 03:31:55,029 INFO L140 encePairwiseOnDemand]: 93/102 looper letters, 36 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2024-11-17 03:31:55,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 352 flow [2024-11-17 03:31:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:31:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:31:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 323 transitions. [2024-11-17 03:31:55,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-17 03:31:55,032 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 254 flow. Second operand 5 states and 323 transitions. [2024-11-17 03:31:55,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 352 flow [2024-11-17 03:31:55,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 311 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-17 03:31:55,036 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 258 flow [2024-11-17 03:31:55,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2024-11-17 03:31:55,039 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2024-11-17 03:31:55,040 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 258 flow [2024-11-17 03:31:55,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 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) [2024-11-17 03:31:55,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:55,040 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:55,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:31:55,040 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:55,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1675174568, now seen corresponding path program 1 times [2024-11-17 03:31:55,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:55,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414178156] [2024-11-17 03:31:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:55,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:55,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:55,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414178156] [2024-11-17 03:31:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414178156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:55,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064813944] [2024-11-17 03:31:55,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:55,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:55,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:55,187 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) [2024-11-17 03:31:55,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:31:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:55,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:31:55,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:55,287 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 [2024-11-17 03:31:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:55,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:55,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064813944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:55,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:55,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:31:55,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335998742] [2024-11-17 03:31:55,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:55,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:31:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:31:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:31:56,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-17 03:31:56,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 258 flow. Second operand has 13 states, 13 states have (on average 54.76923076923077) internal successors, (712), 13 states have internal predecessors, (712), 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) [2024-11-17 03:31:56,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:56,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-17 03:31:56,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:56,581 INFO L124 PetriNetUnfolderBase]: 914/1555 cut-off events. [2024-11-17 03:31:56,581 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-17 03:31:56,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2876 conditions, 1555 events. 914/1555 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8518 event pairs, 551 based on Foata normal form. 0/1094 useless extension candidates. Maximal degree in co-relation 2827. Up to 1237 conditions per place. [2024-11-17 03:31:56,591 INFO L140 encePairwiseOnDemand]: 92/102 looper letters, 33 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-11-17 03:31:56,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 95 transitions, 356 flow [2024-11-17 03:31:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:31:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:31:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 471 transitions. [2024-11-17 03:31:56,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5772058823529411 [2024-11-17 03:31:56,593 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 258 flow. Second operand 8 states and 471 transitions. [2024-11-17 03:31:56,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 95 transitions, 356 flow [2024-11-17 03:31:56,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 95 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:56,595 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 279 flow [2024-11-17 03:31:56,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=279, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-11-17 03:31:56,596 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 2 predicate places. [2024-11-17 03:31:56,596 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 279 flow [2024-11-17 03:31:56,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.76923076923077) internal successors, (712), 13 states have internal predecessors, (712), 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) [2024-11-17 03:31:56,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:56,597 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:56,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:56,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-17 03:31:56,801 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:56,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1691682647, now seen corresponding path program 1 times [2024-11-17 03:31:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:56,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098391282] [2024-11-17 03:31:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:56,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098391282] [2024-11-17 03:31:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098391282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:56,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:56,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:31:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979037894] [2024-11-17 03:31:56,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:56,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:56,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:56,920 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-17 03:31:56,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 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) [2024-11-17 03:31:56,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:56,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-17 03:31:56,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:57,182 INFO L124 PetriNetUnfolderBase]: 1568/2824 cut-off events. [2024-11-17 03:31:57,182 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-17 03:31:57,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5143 conditions, 2824 events. 1568/2824 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18044 event pairs, 834 based on Foata normal form. 62/2118 useless extension candidates. Maximal degree in co-relation 3332. Up to 1462 conditions per place. [2024-11-17 03:31:57,199 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 95 selfloop transitions, 5 changer transitions 0/145 dead transitions. [2024-11-17 03:31:57,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 145 transitions, 639 flow [2024-11-17 03:31:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 419 transitions. [2024-11-17 03:31:57,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.684640522875817 [2024-11-17 03:31:57,201 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 279 flow. Second operand 6 states and 419 transitions. [2024-11-17 03:31:57,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 145 transitions, 639 flow [2024-11-17 03:31:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 145 transitions, 578 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:31:57,203 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 268 flow [2024-11-17 03:31:57,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2024-11-17 03:31:57,204 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 3 predicate places. [2024-11-17 03:31:57,204 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 268 flow [2024-11-17 03:31:57,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 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) [2024-11-17 03:31:57,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:57,204 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:57,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:31:57,204 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:57,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash -347380544, now seen corresponding path program 1 times [2024-11-17 03:31:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:57,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972989902] [2024-11-17 03:31:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:57,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:57,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:57,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972989902] [2024-11-17 03:31:57,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972989902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:57,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:57,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:31:57,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169972184] [2024-11-17 03:31:57,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:57,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:57,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:57,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-17 03:31:57,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 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) [2024-11-17 03:31:57,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:57,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-17 03:31:57,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:57,632 INFO L124 PetriNetUnfolderBase]: 2331/4413 cut-off events. [2024-11-17 03:31:57,633 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2024-11-17 03:31:57,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8212 conditions, 4413 events. 2331/4413 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 32137 event pairs, 1157 based on Foata normal form. 106/3416 useless extension candidates. Maximal degree in co-relation 5155. Up to 2262 conditions per place. [2024-11-17 03:31:57,652 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 90 selfloop transitions, 7 changer transitions 0/142 dead transitions. [2024-11-17 03:31:57,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 142 transitions, 586 flow [2024-11-17 03:31:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 418 transitions. [2024-11-17 03:31:57,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6830065359477124 [2024-11-17 03:31:57,653 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 268 flow. Second operand 6 states and 418 transitions. [2024-11-17 03:31:57,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 142 transitions, 586 flow [2024-11-17 03:31:57,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 582 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:57,656 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 310 flow [2024-11-17 03:31:57,657 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-11-17 03:31:57,659 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 11 predicate places. [2024-11-17 03:31:57,659 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 310 flow [2024-11-17 03:31:57,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 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) [2024-11-17 03:31:57,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:57,660 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:57,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:31:57,660 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:57,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1743834495, now seen corresponding path program 1 times [2024-11-17 03:31:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:57,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472295560] [2024-11-17 03:31:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:57,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:57,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472295560] [2024-11-17 03:31:57,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472295560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:57,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:57,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:31:57,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508859469] [2024-11-17 03:31:57,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:57,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:57,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:57,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-17 03:31:57,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 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) [2024-11-17 03:31:57,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:57,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-17 03:31:57,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:58,112 INFO L124 PetriNetUnfolderBase]: 2011/3803 cut-off events. [2024-11-17 03:31:58,112 INFO L125 PetriNetUnfolderBase]: For 899/899 co-relation queries the response was YES. [2024-11-17 03:31:58,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7466 conditions, 3803 events. 2011/3803 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26552 event pairs, 1138 based on Foata normal form. 38/2844 useless extension candidates. Maximal degree in co-relation 4572. Up to 2134 conditions per place. [2024-11-17 03:31:58,132 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 83 selfloop transitions, 8 changer transitions 0/136 dead transitions. [2024-11-17 03:31:58,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 136 transitions, 591 flow [2024-11-17 03:31:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 413 transitions. [2024-11-17 03:31:58,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6748366013071896 [2024-11-17 03:31:58,134 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 310 flow. Second operand 6 states and 413 transitions. [2024-11-17 03:31:58,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 136 transitions, 591 flow [2024-11-17 03:31:58,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 136 transitions, 584 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:58,137 INFO L231 Difference]: Finished difference. Result has 109 places, 101 transitions, 341 flow [2024-11-17 03:31:58,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=109, PETRI_TRANSITIONS=101} [2024-11-17 03:31:58,138 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 16 predicate places. [2024-11-17 03:31:58,138 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 341 flow [2024-11-17 03:31:58,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 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) [2024-11-17 03:31:58,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:58,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:58,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:31:58,139 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:58,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1450308347, now seen corresponding path program 1 times [2024-11-17 03:31:58,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:58,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71510986] [2024-11-17 03:31:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:58,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:58,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71510986] [2024-11-17 03:31:58,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71510986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:58,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:58,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:31:58,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364504739] [2024-11-17 03:31:58,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:58,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:58,226 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-17 03:31:58,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 101 transitions, 341 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2024-11-17 03:31:58,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:58,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-17 03:31:58,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:58,517 INFO L124 PetriNetUnfolderBase]: 1620/3610 cut-off events. [2024-11-17 03:31:58,518 INFO L125 PetriNetUnfolderBase]: For 1332/1332 co-relation queries the response was YES. [2024-11-17 03:31:58,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6917 conditions, 3610 events. 1620/3610 cut-off events. For 1332/1332 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 28355 event pairs, 920 based on Foata normal form. 58/2772 useless extension candidates. Maximal degree in co-relation 4949. Up to 1756 conditions per place. [2024-11-17 03:31:58,539 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 99 selfloop transitions, 5 changer transitions 0/149 dead transitions. [2024-11-17 03:31:58,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 149 transitions, 734 flow [2024-11-17 03:31:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 411 transitions. [2024-11-17 03:31:58,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6715686274509803 [2024-11-17 03:31:58,541 INFO L175 Difference]: Start difference. First operand has 109 places, 101 transitions, 341 flow. Second operand 6 states and 411 transitions. [2024-11-17 03:31:58,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 149 transitions, 734 flow [2024-11-17 03:31:58,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 149 transitions, 718 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:31:58,544 INFO L231 Difference]: Finished difference. Result has 113 places, 102 transitions, 350 flow [2024-11-17 03:31:58,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=113, PETRI_TRANSITIONS=102} [2024-11-17 03:31:58,544 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 20 predicate places. [2024-11-17 03:31:58,545 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 350 flow [2024-11-17 03:31:58,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2024-11-17 03:31:58,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:58,545 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:58,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:31:58,545 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:58,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:58,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1746309901, now seen corresponding path program 1 times [2024-11-17 03:31:58,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:58,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839406090] [2024-11-17 03:31:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:58,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:58,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839406090] [2024-11-17 03:31:58,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839406090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:58,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:58,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:31:58,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17483004] [2024-11-17 03:31:58,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:58,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:58,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:58,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:58,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:58,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-17 03:31:58,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 102 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2024-11-17 03:31:58,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:58,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-17 03:31:58,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:59,050 INFO L124 PetriNetUnfolderBase]: 2520/5952 cut-off events. [2024-11-17 03:31:59,050 INFO L125 PetriNetUnfolderBase]: For 2843/2843 co-relation queries the response was YES. [2024-11-17 03:31:59,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11716 conditions, 5952 events. 2520/5952 cut-off events. For 2843/2843 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 53144 event pairs, 1251 based on Foata normal form. 92/4631 useless extension candidates. Maximal degree in co-relation 8088. Up to 2321 conditions per place. [2024-11-17 03:31:59,079 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 94 selfloop transitions, 9 changer transitions 0/148 dead transitions. [2024-11-17 03:31:59,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 148 transitions, 722 flow [2024-11-17 03:31:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 410 transitions. [2024-11-17 03:31:59,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6699346405228758 [2024-11-17 03:31:59,081 INFO L175 Difference]: Start difference. First operand has 113 places, 102 transitions, 350 flow. Second operand 6 states and 410 transitions. [2024-11-17 03:31:59,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 148 transitions, 722 flow [2024-11-17 03:31:59,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 148 transitions, 715 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:31:59,085 INFO L231 Difference]: Finished difference. Result has 118 places, 105 transitions, 392 flow [2024-11-17 03:31:59,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=118, PETRI_TRANSITIONS=105} [2024-11-17 03:31:59,085 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 25 predicate places. [2024-11-17 03:31:59,085 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 105 transitions, 392 flow [2024-11-17 03:31:59,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2024-11-17 03:31:59,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:59,086 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:59,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:31:59,086 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:59,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash 282114463, now seen corresponding path program 1 times [2024-11-17 03:31:59,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:59,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883281969] [2024-11-17 03:31:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:59,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:59,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883281969] [2024-11-17 03:31:59,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883281969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:59,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:59,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:31:59,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803596036] [2024-11-17 03:31:59,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:59,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:31:59,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:31:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:31:59,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 102 [2024-11-17 03:31:59,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 105 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 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) [2024-11-17 03:31:59,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:59,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 102 [2024-11-17 03:31:59,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:59,926 INFO L124 PetriNetUnfolderBase]: 3467/7781 cut-off events. [2024-11-17 03:31:59,926 INFO L125 PetriNetUnfolderBase]: For 4800/4800 co-relation queries the response was YES. [2024-11-17 03:31:59,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15835 conditions, 7781 events. 3467/7781 cut-off events. For 4800/4800 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 69402 event pairs, 2602 based on Foata normal form. 0/6026 useless extension candidates. Maximal degree in co-relation 12185. Up to 5068 conditions per place. [2024-11-17 03:31:59,971 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 51 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2024-11-17 03:31:59,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 101 transitions, 498 flow [2024-11-17 03:31:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:31:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:31:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 283 transitions. [2024-11-17 03:31:59,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5549019607843138 [2024-11-17 03:31:59,973 INFO L175 Difference]: Start difference. First operand has 118 places, 105 transitions, 392 flow. Second operand 5 states and 283 transitions. [2024-11-17 03:31:59,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 101 transitions, 498 flow [2024-11-17 03:31:59,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 101 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:59,978 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 392 flow [2024-11-17 03:31:59,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2024-11-17 03:31:59,980 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 24 predicate places. [2024-11-17 03:31:59,980 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 392 flow [2024-11-17 03:31:59,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 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) [2024-11-17 03:31:59,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:59,980 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:59,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:31:59,981 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:31:59,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:59,981 INFO L85 PathProgramCache]: Analyzing trace with hash 282114464, now seen corresponding path program 1 times [2024-11-17 03:31:59,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:59,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754039372] [2024-11-17 03:31:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:59,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:00,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:00,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754039372] [2024-11-17 03:32:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754039372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:00,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934713522] [2024-11-17 03:32:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:00,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:00,241 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) [2024-11-17 03:32:00,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:32:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:00,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:32:00,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:00,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:32:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:32:00,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:32:00,377 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-17 03:32:00,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-17 03:32:00,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:32:00,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:32:00,448 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:00,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:32:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:00,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:00,756 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 100 treesize of output 96 [2024-11-17 03:32:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934713522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:00,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:00,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-17 03:32:00,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3962949] [2024-11-17 03:32:00,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:00,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:32:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:32:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:32:03,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 102 [2024-11-17 03:32:03,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 392 flow. Second operand has 16 states, 16 states have (on average 45.125) internal successors, (722), 16 states have internal predecessors, (722), 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) [2024-11-17 03:32:03,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:03,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 102 [2024-11-17 03:32:03,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:05,243 INFO L124 PetriNetUnfolderBase]: 7168/13538 cut-off events. [2024-11-17 03:32:05,243 INFO L125 PetriNetUnfolderBase]: For 6733/6733 co-relation queries the response was YES. [2024-11-17 03:32:05,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28019 conditions, 13538 events. 7168/13538 cut-off events. For 6733/6733 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 112888 event pairs, 2244 based on Foata normal form. 0/11059 useless extension candidates. Maximal degree in co-relation 24363. Up to 4214 conditions per place. [2024-11-17 03:32:05,320 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 127 selfloop transitions, 22 changer transitions 0/188 dead transitions. [2024-11-17 03:32:05,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 188 transitions, 1005 flow [2024-11-17 03:32:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:32:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:32:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 523 transitions. [2024-11-17 03:32:05,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5697167755991286 [2024-11-17 03:32:05,322 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 392 flow. Second operand 9 states and 523 transitions. [2024-11-17 03:32:05,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 188 transitions, 1005 flow [2024-11-17 03:32:05,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 188 transitions, 993 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:05,329 INFO L231 Difference]: Finished difference. Result has 123 places, 109 transitions, 502 flow [2024-11-17 03:32:05,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=502, PETRI_PLACES=123, PETRI_TRANSITIONS=109} [2024-11-17 03:32:05,330 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 30 predicate places. [2024-11-17 03:32:05,331 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 109 transitions, 502 flow [2024-11-17 03:32:05,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 45.125) internal successors, (722), 16 states have internal predecessors, (722), 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) [2024-11-17 03:32:05,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:05,331 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] [2024-11-17 03:32:05,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:32:05,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:05,536 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:32:05,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash 155614522, now seen corresponding path program 1 times [2024-11-17 03:32:05,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:05,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453322877] [2024-11-17 03:32:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:05,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:05,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453322877] [2024-11-17 03:32:05,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453322877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406023467] [2024-11-17 03:32:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:05,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:05,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:05,725 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) [2024-11-17 03:32:05,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:32:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:05,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:32:05,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:05,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:32:05,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:32:05,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:32:05,871 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:05,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:32:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:05,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:06,039 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 52 treesize of output 48 [2024-11-17 03:32:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:06,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406023467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:06,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:06,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-17 03:32:06,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763044776] [2024-11-17 03:32:06,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:06,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:32:06,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:32:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:32:06,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-17 03:32:06,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 109 transitions, 502 flow. Second operand has 14 states, 14 states have (on average 54.857142857142854) internal successors, (768), 14 states have internal predecessors, (768), 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) [2024-11-17 03:32:06,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:06,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-17 03:32:06,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:07,876 INFO L124 PetriNetUnfolderBase]: 4462/9096 cut-off events. [2024-11-17 03:32:07,876 INFO L125 PetriNetUnfolderBase]: For 6489/6489 co-relation queries the response was YES. [2024-11-17 03:32:07,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19573 conditions, 9096 events. 4462/9096 cut-off events. For 6489/6489 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 75863 event pairs, 1564 based on Foata normal form. 0/7618 useless extension candidates. Maximal degree in co-relation 16043. Up to 2366 conditions per place. [2024-11-17 03:32:07,939 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 108 selfloop transitions, 24 changer transitions 0/177 dead transitions. [2024-11-17 03:32:07,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 177 transitions, 967 flow [2024-11-17 03:32:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:32:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:32:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 595 transitions. [2024-11-17 03:32:07,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-11-17 03:32:07,944 INFO L175 Difference]: Start difference. First operand has 123 places, 109 transitions, 502 flow. Second operand 9 states and 595 transitions. [2024-11-17 03:32:07,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 177 transitions, 967 flow [2024-11-17 03:32:07,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 177 transitions, 955 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-17 03:32:07,953 INFO L231 Difference]: Finished difference. Result has 130 places, 111 transitions, 567 flow [2024-11-17 03:32:07,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=567, PETRI_PLACES=130, PETRI_TRANSITIONS=111} [2024-11-17 03:32:07,953 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 37 predicate places. [2024-11-17 03:32:07,953 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 111 transitions, 567 flow [2024-11-17 03:32:07,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.857142857142854) internal successors, (768), 14 states have internal predecessors, (768), 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) [2024-11-17 03:32:07,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:07,954 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] [2024-11-17 03:32:07,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:08,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:08,155 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:32:08,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash 155614521, now seen corresponding path program 1 times [2024-11-17 03:32:08,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:08,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44117134] [2024-11-17 03:32:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:08,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:08,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44117134] [2024-11-17 03:32:08,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44117134] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:08,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:08,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:32:08,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536511057] [2024-11-17 03:32:08,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:08,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:08,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:08,293 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 102 [2024-11-17 03:32:08,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 111 transitions, 567 flow. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2024-11-17 03:32:08,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:08,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 102 [2024-11-17 03:32:08,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:08,881 INFO L124 PetriNetUnfolderBase]: 5145/10177 cut-off events. [2024-11-17 03:32:08,881 INFO L125 PetriNetUnfolderBase]: For 9161/9161 co-relation queries the response was YES. [2024-11-17 03:32:08,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22875 conditions, 10177 events. 5145/10177 cut-off events. For 9161/9161 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 84712 event pairs, 3886 based on Foata normal form. 180/8816 useless extension candidates. Maximal degree in co-relation 18888. Up to 7422 conditions per place. [2024-11-17 03:32:09,056 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 55 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2024-11-17 03:32:09,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 107 transitions, 693 flow [2024-11-17 03:32:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:32:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:32:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 287 transitions. [2024-11-17 03:32:09,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5627450980392157 [2024-11-17 03:32:09,059 INFO L175 Difference]: Start difference. First operand has 130 places, 111 transitions, 567 flow. Second operand 5 states and 287 transitions. [2024-11-17 03:32:09,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 107 transitions, 693 flow [2024-11-17 03:32:09,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 107 transitions, 654 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-17 03:32:09,071 INFO L231 Difference]: Finished difference. Result has 125 places, 107 transitions, 544 flow [2024-11-17 03:32:09,071 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=125, PETRI_TRANSITIONS=107} [2024-11-17 03:32:09,071 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 32 predicate places. [2024-11-17 03:32:09,072 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 107 transitions, 544 flow [2024-11-17 03:32:09,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2024-11-17 03:32:09,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:09,072 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:09,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-17 03:32:09,072 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:32:09,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1013867810, now seen corresponding path program 1 times [2024-11-17 03:32:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901157946] [2024-11-17 03:32:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901157946] [2024-11-17 03:32:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901157946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:09,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:09,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:32:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742786940] [2024-11-17 03:32:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:09,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:32:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:09,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:32:09,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:32:09,183 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-17 03:32:09,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 107 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 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) [2024-11-17 03:32:09,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:09,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-17 03:32:09,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:09,868 INFO L124 PetriNetUnfolderBase]: 3472/7388 cut-off events. [2024-11-17 03:32:09,869 INFO L125 PetriNetUnfolderBase]: For 7125/7215 co-relation queries the response was YES. [2024-11-17 03:32:09,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16299 conditions, 7388 events. 3472/7388 cut-off events. For 7125/7215 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 61507 event pairs, 2143 based on Foata normal form. 94/6324 useless extension candidates. Maximal degree in co-relation 12758. Up to 3735 conditions per place. [2024-11-17 03:32:09,923 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 94 selfloop transitions, 14 changer transitions 0/145 dead transitions. [2024-11-17 03:32:09,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 145 transitions, 946 flow [2024-11-17 03:32:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 403 transitions. [2024-11-17 03:32:09,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6584967320261438 [2024-11-17 03:32:09,925 INFO L175 Difference]: Start difference. First operand has 125 places, 107 transitions, 544 flow. Second operand 6 states and 403 transitions. [2024-11-17 03:32:09,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 145 transitions, 946 flow [2024-11-17 03:32:09,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 145 transitions, 930 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:09,933 INFO L231 Difference]: Finished difference. Result has 129 places, 109 transitions, 580 flow [2024-11-17 03:32:09,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=580, PETRI_PLACES=129, PETRI_TRANSITIONS=109} [2024-11-17 03:32:09,934 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 36 predicate places. [2024-11-17 03:32:09,934 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 580 flow [2024-11-17 03:32:09,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 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) [2024-11-17 03:32:09,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:09,934 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] [2024-11-17 03:32:09,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:32:09,935 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:32:09,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1891339435, now seen corresponding path program 1 times [2024-11-17 03:32:09,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:09,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447013735] [2024-11-17 03:32:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:09,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:10,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:10,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447013735] [2024-11-17 03:32:10,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447013735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:10,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128299331] [2024-11-17 03:32:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:10,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:10,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:10,139 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) [2024-11-17 03:32:10,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:32:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:10,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:32:10,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:10,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:32:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:32:10,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:32:10,277 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:10,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:32:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:10,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:10,458 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 52 treesize of output 48 [2024-11-17 03:32:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:10,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128299331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:10,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:10,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-17 03:32:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114603318] [2024-11-17 03:32:10,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:10,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:32:10,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:32:10,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:32:11,352 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 102 [2024-11-17 03:32:11,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 580 flow. Second operand has 14 states, 14 states have (on average 54.285714285714285) internal successors, (760), 14 states have internal predecessors, (760), 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) [2024-11-17 03:32:11,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:11,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 102 [2024-11-17 03:32:11,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:12,563 INFO L124 PetriNetUnfolderBase]: 7014/14001 cut-off events. [2024-11-17 03:32:12,563 INFO L125 PetriNetUnfolderBase]: For 15204/15702 co-relation queries the response was YES. [2024-11-17 03:32:12,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30466 conditions, 14001 events. 7014/14001 cut-off events. For 15204/15702 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 122726 event pairs, 1916 based on Foata normal form. 0/11571 useless extension candidates. Maximal degree in co-relation 24624. Up to 3918 conditions per place. [2024-11-17 03:32:12,674 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 116 selfloop transitions, 24 changer transitions 0/180 dead transitions. [2024-11-17 03:32:12,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 180 transitions, 1136 flow [2024-11-17 03:32:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:32:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:32:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 584 transitions. [2024-11-17 03:32:12,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6361655773420479 [2024-11-17 03:32:12,676 INFO L175 Difference]: Start difference. First operand has 129 places, 109 transitions, 580 flow. Second operand 9 states and 584 transitions. [2024-11-17 03:32:12,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 180 transitions, 1136 flow [2024-11-17 03:32:12,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 180 transitions, 1116 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:12,689 INFO L231 Difference]: Finished difference. Result has 135 places, 110 transitions, 626 flow [2024-11-17 03:32:12,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=626, PETRI_PLACES=135, PETRI_TRANSITIONS=110} [2024-11-17 03:32:12,689 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 42 predicate places. [2024-11-17 03:32:12,689 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 110 transitions, 626 flow [2024-11-17 03:32:12,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.285714285714285) internal successors, (760), 14 states have internal predecessors, (760), 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) [2024-11-17 03:32:12,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:12,690 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] [2024-11-17 03:32:12,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:32:12,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-17 03:32:12,891 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:32:12,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1498020409, now seen corresponding path program 1 times [2024-11-17 03:32:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759202631] [2024-11-17 03:32:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759202631] [2024-11-17 03:32:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759202631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860145274] [2024-11-17 03:32:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:13,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:13,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:13,040 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) [2024-11-17 03:32:13,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:32:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:13,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:32:13,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:13,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:13,234 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 [2024-11-17 03:32:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:13,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860145274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:13,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:13,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-17 03:32:13,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897309701] [2024-11-17 03:32:13,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:13,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:32:13,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:13,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:32:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:32:13,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-17 03:32:13,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 110 transitions, 626 flow. Second operand has 11 states, 11 states have (on average 58.18181818181818) internal successors, (640), 11 states have internal predecessors, (640), 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) [2024-11-17 03:32:13,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:13,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-17 03:32:13,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:14,530 INFO L124 PetriNetUnfolderBase]: 6245/12339 cut-off events. [2024-11-17 03:32:14,530 INFO L125 PetriNetUnfolderBase]: For 15883/16237 co-relation queries the response was YES. [2024-11-17 03:32:14,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28709 conditions, 12339 events. 6245/12339 cut-off events. For 15883/16237 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 103965 event pairs, 2074 based on Foata normal form. 0/11141 useless extension candidates. Maximal degree in co-relation 23007. Up to 3124 conditions per place. [2024-11-17 03:32:14,601 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 112 selfloop transitions, 24 changer transitions 0/177 dead transitions. [2024-11-17 03:32:14,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 177 transitions, 1176 flow [2024-11-17 03:32:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:32:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:32:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 500 transitions. [2024-11-17 03:32:14,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7002801120448179 [2024-11-17 03:32:14,603 INFO L175 Difference]: Start difference. First operand has 135 places, 110 transitions, 626 flow. Second operand 7 states and 500 transitions. [2024-11-17 03:32:14,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 177 transitions, 1176 flow [2024-11-17 03:32:14,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 177 transitions, 1132 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-17 03:32:14,615 INFO L231 Difference]: Finished difference. Result has 136 places, 110 transitions, 646 flow [2024-11-17 03:32:14,615 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=646, PETRI_PLACES=136, PETRI_TRANSITIONS=110} [2024-11-17 03:32:14,616 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 43 predicate places. [2024-11-17 03:32:14,616 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 110 transitions, 646 flow [2024-11-17 03:32:14,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 58.18181818181818) internal successors, (640), 11 states have internal predecessors, (640), 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) [2024-11-17 03:32:14,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:14,616 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] [2024-11-17 03:32:14,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:32:14,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-17 03:32:14,817 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:32:14,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:14,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1498020408, now seen corresponding path program 1 times [2024-11-17 03:32:14,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:14,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462563419] [2024-11-17 03:32:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:14,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:14,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:14,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462563419] [2024-11-17 03:32:14,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462563419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:14,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:14,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:32:14,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997519748] [2024-11-17 03:32:14,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:14,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:14,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:14,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 102 [2024-11-17 03:32:14,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 110 transitions, 646 flow. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 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) [2024-11-17 03:32:14,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:14,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 102 [2024-11-17 03:32:14,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:15,774 INFO L124 PetriNetUnfolderBase]: 6676/13303 cut-off events. [2024-11-17 03:32:15,775 INFO L125 PetriNetUnfolderBase]: For 19551/20001 co-relation queries the response was YES. [2024-11-17 03:32:15,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31925 conditions, 13303 events. 6676/13303 cut-off events. For 19551/20001 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 114392 event pairs, 5305 based on Foata normal form. 295/12474 useless extension candidates. Maximal degree in co-relation 26257. Up to 9653 conditions per place. [2024-11-17 03:32:15,875 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 60 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2024-11-17 03:32:15,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 106 transitions, 776 flow [2024-11-17 03:32:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2024-11-17 03:32:15,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5906862745098039 [2024-11-17 03:32:15,878 INFO L175 Difference]: Start difference. First operand has 136 places, 110 transitions, 646 flow. Second operand 4 states and 241 transitions. [2024-11-17 03:32:15,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 106 transitions, 776 flow [2024-11-17 03:32:15,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 106 transitions, 730 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-17 03:32:15,891 INFO L231 Difference]: Finished difference. Result has 130 places, 106 transitions, 610 flow [2024-11-17 03:32:15,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=130, PETRI_TRANSITIONS=106} [2024-11-17 03:32:15,892 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 37 predicate places. [2024-11-17 03:32:15,892 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 106 transitions, 610 flow [2024-11-17 03:32:15,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 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) [2024-11-17 03:32:15,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:15,892 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] [2024-11-17 03:32:15,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 03:32:15,893 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:32:15,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1460028655, now seen corresponding path program 1 times [2024-11-17 03:32:15,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:15,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820996708] [2024-11-17 03:32:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:15,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:16,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:16,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820996708] [2024-11-17 03:32:16,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820996708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:16,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539383456] [2024-11-17 03:32:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:16,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:16,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:16,187 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) [2024-11-17 03:32:16,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:32:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:16,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:32:16,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:16,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:32:16,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:32:16,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:32:16,313 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:16,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:32:16,330 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:16,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-17 03:32:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:16,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:16,579 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 46 treesize of output 42 [2024-11-17 03:32:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:16,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539383456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:16,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:16,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 14 [2024-11-17 03:32:16,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566689888] [2024-11-17 03:32:16,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:16,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:32:16,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:32:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:32:20,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:24,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:26,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:30,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:34,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:38,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:43,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:47,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:51,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:55,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:32:59,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:33:03,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:33:03,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 102 [2024-11-17 03:33:03,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 106 transitions, 610 flow. Second operand has 16 states, 16 states have (on average 42.375) internal successors, (678), 16 states have internal predecessors, (678), 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) [2024-11-17 03:33:03,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:03,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 102 [2024-11-17 03:33:03,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:05,601 INFO L124 PetriNetUnfolderBase]: 16203/27565 cut-off events. [2024-11-17 03:33:05,601 INFO L125 PetriNetUnfolderBase]: For 35011/36006 co-relation queries the response was YES. [2024-11-17 03:33:05,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66185 conditions, 27565 events. 16203/27565 cut-off events. For 35011/36006 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 227617 event pairs, 4749 based on Foata normal form. 0/25979 useless extension candidates. Maximal degree in co-relation 61052. Up to 7612 conditions per place. [2024-11-17 03:33:05,819 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 136 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2024-11-17 03:33:05,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 192 transitions, 1310 flow [2024-11-17 03:33:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 531 transitions. [2024-11-17 03:33:05,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205882352941177 [2024-11-17 03:33:05,821 INFO L175 Difference]: Start difference. First operand has 130 places, 106 transitions, 610 flow. Second operand 10 states and 531 transitions. [2024-11-17 03:33:05,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 192 transitions, 1310 flow [2024-11-17 03:33:05,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 192 transitions, 1300 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:05,840 INFO L231 Difference]: Finished difference. Result has 139 places, 108 transitions, 673 flow [2024-11-17 03:33:05,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=673, PETRI_PLACES=139, PETRI_TRANSITIONS=108} [2024-11-17 03:33:05,841 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 46 predicate places. [2024-11-17 03:33:05,841 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 108 transitions, 673 flow [2024-11-17 03:33:05,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 42.375) internal successors, (678), 16 states have internal predecessors, (678), 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) [2024-11-17 03:33:05,842 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:05,842 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:05,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:33:06,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:06,046 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:33:06,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash -599135856, now seen corresponding path program 1 times [2024-11-17 03:33:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:06,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199208476] [2024-11-17 03:33:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:06,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:06,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199208476] [2024-11-17 03:33:06,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199208476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581568352] [2024-11-17 03:33:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:06,171 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) [2024-11-17 03:33:06,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:33:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:06,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:33:06,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:06,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581568352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:06,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-17 03:33:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818811592] [2024-11-17 03:33:06,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:06,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:33:06,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:33:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:33:06,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-17 03:33:06,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 108 transitions, 673 flow. Second operand has 16 states, 16 states have (on average 57.5) internal successors, (920), 16 states have internal predecessors, (920), 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) [2024-11-17 03:33:06,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:06,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-17 03:33:06,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:11,824 INFO L124 PetriNetUnfolderBase]: 25367/48101 cut-off events. [2024-11-17 03:33:11,825 INFO L125 PetriNetUnfolderBase]: For 75631/78033 co-relation queries the response was YES. [2024-11-17 03:33:12,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118961 conditions, 48101 events. 25367/48101 cut-off events. For 75631/78033 co-relation queries the response was YES. Maximal size of possible extension queue 1812. Compared 486470 event pairs, 7796 based on Foata normal form. 744/46886 useless extension candidates. Maximal degree in co-relation 62544. Up to 11157 conditions per place. [2024-11-17 03:33:12,264 INFO L140 encePairwiseOnDemand]: 87/102 looper letters, 298 selfloop transitions, 61 changer transitions 0/392 dead transitions. [2024-11-17 03:33:12,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 392 transitions, 2944 flow [2024-11-17 03:33:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-17 03:33:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-17 03:33:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1866 transitions. [2024-11-17 03:33:12,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6308316430020284 [2024-11-17 03:33:12,267 INFO L175 Difference]: Start difference. First operand has 139 places, 108 transitions, 673 flow. Second operand 29 states and 1866 transitions. [2024-11-17 03:33:12,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 392 transitions, 2944 flow [2024-11-17 03:33:12,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 392 transitions, 2830 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:12,339 INFO L231 Difference]: Finished difference. Result has 172 places, 150 transitions, 1181 flow [2024-11-17 03:33:12,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1181, PETRI_PLACES=172, PETRI_TRANSITIONS=150} [2024-11-17 03:33:12,340 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 79 predicate places. [2024-11-17 03:33:12,340 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 150 transitions, 1181 flow [2024-11-17 03:33:12,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.5) internal successors, (920), 16 states have internal predecessors, (920), 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) [2024-11-17 03:33:12,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:12,340 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] [2024-11-17 03:33:12,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:33:12,543 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,SelfDestructingSolverStorable20 [2024-11-17 03:33:12,544 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:33:12,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1983752721, now seen corresponding path program 1 times [2024-11-17 03:33:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:12,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329634021] [2024-11-17 03:33:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:12,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:12,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:12,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329634021] [2024-11-17 03:33:12,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329634021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:12,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514157314] [2024-11-17 03:33:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:12,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:12,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:12,700 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) [2024-11-17 03:33:12,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:33:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:33:12,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:12,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:12,898 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 [2024-11-17 03:33:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:12,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514157314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:12,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:12,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-17 03:33:12,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000866162] [2024-11-17 03:33:12,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:12,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:33:12,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:33:12,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:33:13,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-17 03:33:13,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 150 transitions, 1181 flow. Second operand has 12 states, 12 states have (on average 58.416666666666664) internal successors, (701), 12 states have internal predecessors, (701), 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) [2024-11-17 03:33:13,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:13,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-17 03:33:13,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:18,812 INFO L124 PetriNetUnfolderBase]: 27893/50651 cut-off events. [2024-11-17 03:33:18,812 INFO L125 PetriNetUnfolderBase]: For 116878/121898 co-relation queries the response was YES. [2024-11-17 03:33:19,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129374 conditions, 50651 events. 27893/50651 cut-off events. For 116878/121898 co-relation queries the response was YES. Maximal size of possible extension queue 2035. Compared 495940 event pairs, 9106 based on Foata normal form. 0/49077 useless extension candidates. Maximal degree in co-relation 114853. Up to 12935 conditions per place. [2024-11-17 03:33:19,419 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 160 selfloop transitions, 37 changer transitions 0/238 dead transitions. [2024-11-17 03:33:19,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 238 transitions, 2189 flow [2024-11-17 03:33:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:33:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:33:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2024-11-17 03:33:19,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6946778711484594 [2024-11-17 03:33:19,420 INFO L175 Difference]: Start difference. First operand has 172 places, 150 transitions, 1181 flow. Second operand 7 states and 496 transitions. [2024-11-17 03:33:19,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 238 transitions, 2189 flow [2024-11-17 03:33:19,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 238 transitions, 2170 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:19,491 INFO L231 Difference]: Finished difference. Result has 176 places, 150 transitions, 1252 flow [2024-11-17 03:33:19,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1252, PETRI_PLACES=176, PETRI_TRANSITIONS=150} [2024-11-17 03:33:19,491 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 83 predicate places. [2024-11-17 03:33:19,491 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 150 transitions, 1252 flow [2024-11-17 03:33:19,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 58.416666666666664) internal successors, (701), 12 states have internal predecessors, (701), 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) [2024-11-17 03:33:19,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:19,492 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:19,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:33:19,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:19,697 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:33:19,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:19,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1413624847, now seen corresponding path program 1 times [2024-11-17 03:33:19,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:19,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154801590] [2024-11-17 03:33:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:19,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:19,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:19,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154801590] [2024-11-17 03:33:19,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154801590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:19,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286877548] [2024-11-17 03:33:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:19,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:19,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:19,782 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) [2024-11-17 03:33:19,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:33:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:19,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:33:19,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:19,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286877548] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:20,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:20,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-17 03:33:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002231255] [2024-11-17 03:33:20,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:20,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:33:20,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:20,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:33:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:33:20,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-17 03:33:20,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 150 transitions, 1252 flow. Second operand has 16 states, 16 states have (on average 57.625) internal successors, (922), 16 states have internal predecessors, (922), 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) [2024-11-17 03:33:20,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:20,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-17 03:33:20,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand