./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i -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 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:31:42,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:31:42,792 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:31:42,799 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:31:42,800 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:31:42,820 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:31:42,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:31:42,823 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:31:42,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:31:42,824 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:31:42,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:31:42,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:31:42,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:31:42,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:31:42,827 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:31:42,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:31:42,828 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:31:42,828 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:31:42,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:31:42,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:31:42,829 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:31:42,829 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:31:42,830 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:31:42,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:31:42,830 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:31:42,830 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:31:42,831 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:31:42,831 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:31:42,831 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:31:42,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:31:42,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:31:42,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:31:42,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:31:42,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:31:42,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:31:42,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:31:42,833 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:31:42,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:31:42,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:31:42,834 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:31:42,834 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:31:42,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:31:42,834 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2024-10-13 12:31:43,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:31:43,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:31:43,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:31:43,157 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:31:43,157 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:31:43,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2024-10-13 12:31:44,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:31:44,849 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:31:44,850 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2024-10-13 12:31:44,888 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/078a83899/82057aa298a541aaaea82603718baf97/FLAG0735f1726 [2024-10-13 12:31:44,910 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/078a83899/82057aa298a541aaaea82603718baf97 [2024-10-13 12:31:44,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:31:44,915 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:31:44,919 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:31:44,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:31:44,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:31:44,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:31:44" (1/1) ... [2024-10-13 12:31:44,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d6adf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:44, skipping insertion in model container [2024-10-13 12:31:44,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:31:44" (1/1) ... [2024-10-13 12:31:44,982 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:31:45,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:31:45,310 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:31:45,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:31:45,406 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:31:45,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45 WrapperNode [2024-10-13 12:31:45,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:31:45,408 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:31:45,408 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:31:45,408 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:31:45,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,434 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,464 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2024-10-13 12:31:45,465 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:31:45,466 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:31:45,466 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:31:45,466 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:31:45,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,480 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,495 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 6, 5, 2]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 1]. [2024-10-13 12:31:45,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,503 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,508 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,511 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,512 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:31:45,516 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:31:45,516 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:31:45,516 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:31:45,516 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (1/1) ... [2024-10-13 12:31:45,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:31:45,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:31:45,560 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) [2024-10-13 12:31:45,564 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 [2024-10-13 12:31:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:31:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:31:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:31:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 12:31:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-13 12:31:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:31:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:31:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:31:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 12:31:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-13 12:31:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:31:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:31:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:31:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-13 12:31:45,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-13 12:31:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:31:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:31:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:31:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:31:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 12:31:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-13 12:31:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:31:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:31:45,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:31:45,648 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:31:45,807 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:31:45,809 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:31:46,125 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:31:46,125 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:31:46,292 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:31:46,292 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-13 12:31:46,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:31:46 BoogieIcfgContainer [2024-10-13 12:31:46,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:31:46,294 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:31:46,294 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:31:46,297 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:31:46,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:31:44" (1/3) ... [2024-10-13 12:31:46,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682d9f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:31:46, skipping insertion in model container [2024-10-13 12:31:46,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:31:45" (2/3) ... [2024-10-13 12:31:46,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682d9f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:31:46, skipping insertion in model container [2024-10-13 12:31:46,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:31:46" (3/3) ... [2024-10-13 12:31:46,299 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2024-10-13 12:31:46,311 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:31:46,312 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-13 12:31:46,312 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:31:46,342 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-13 12:31:46,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 75 transitions, 157 flow [2024-10-13 12:31:46,411 INFO L124 PetriNetUnfolderBase]: 15/109 cut-off events. [2024-10-13 12:31:46,411 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 12:31:46,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 109 events. 15/109 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 463 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2024-10-13 12:31:46,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 75 transitions, 157 flow [2024-10-13 12:31:46,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 75 transitions, 157 flow [2024-10-13 12:31:46,428 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:31:46,437 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;@1bc4a16e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:31:46,437 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-10-13 12:31:46,441 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:31:46,441 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:31:46,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:31:46,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:46,442 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:31:46,442 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-13 12:31:46,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 364973, now seen corresponding path program 1 times [2024-10-13 12:31:46,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:46,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813860512] [2024-10-13 12:31:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:46,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:46,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813860512] [2024-10-13 12:31:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813860512] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:46,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:31:46,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248178512] [2024-10-13 12:31:46,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:46,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:31:46,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:31:46,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:31:46,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 75 [2024-10-13 12:31:46,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:31:46,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:46,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 75 [2024-10-13 12:31:46,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:47,163 INFO L124 PetriNetUnfolderBase]: 166/593 cut-off events. [2024-10-13 12:31:47,163 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 12:31:47,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 593 events. 166/593 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3419 event pairs, 143 based on Foata normal form. 101/642 useless extension candidates. Maximal degree in co-relation 914. Up to 326 conditions per place. [2024-10-13 12:31:47,170 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 39 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-10-13 12:31:47,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 235 flow [2024-10-13 12:31:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:31:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:31:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-10-13 12:31:47,183 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-10-13 12:31:47,186 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 157 flow. Second operand 3 states and 155 transitions. [2024-10-13 12:31:47,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 235 flow [2024-10-13 12:31:47,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 235 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:31:47,193 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 135 flow [2024-10-13 12:31:47,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-10-13 12:31:47,201 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-10-13 12:31:47,201 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 135 flow [2024-10-13 12:31:47,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:31:47,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:47,202 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:31:47,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:31:47,203 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-13 12:31:47,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash 364974, now seen corresponding path program 1 times [2024-10-13 12:31:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:47,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340851995] [2024-10-13 12:31:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:47,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:47,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340851995] [2024-10-13 12:31:47,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340851995] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:47,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:47,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:31:47,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209335993] [2024-10-13 12:31:47,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:47,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:31:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:31:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:31:47,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2024-10-13 12:31:47,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-10-13 12:31:47,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:47,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2024-10-13 12:31:47,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:47,526 INFO L124 PetriNetUnfolderBase]: 154/543 cut-off events. [2024-10-13 12:31:47,527 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 12:31:47,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 543 events. 154/543 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3197 event pairs, 0 based on Foata normal form. 1/495 useless extension candidates. Maximal degree in co-relation 864. Up to 327 conditions per place. [2024-10-13 12:31:47,533 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 39 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-10-13 12:31:47,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 241 flow [2024-10-13 12:31:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:31:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:31:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-10-13 12:31:47,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-10-13 12:31:47,538 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 135 flow. Second operand 3 states and 148 transitions. [2024-10-13 12:31:47,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 241 flow [2024-10-13 12:31:47,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:31:47,541 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 141 flow [2024-10-13 12:31:47,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-10-13 12:31:47,544 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-10-13 12:31:47,545 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 141 flow [2024-10-13 12:31:47,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-10-13 12:31:47,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:47,545 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-13 12:31:47,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:31:47,546 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-13 12:31:47,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2064414505, now seen corresponding path program 1 times [2024-10-13 12:31:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:47,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361808546] [2024-10-13 12:31:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:47,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:47,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361808546] [2024-10-13 12:31:47,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361808546] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:47,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:47,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:31:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240640973] [2024-10-13 12:31:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:47,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:31:47,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:31:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:31:47,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2024-10-13 12:31:47,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:31:47,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:47,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2024-10-13 12:31:47,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:47,903 INFO L124 PetriNetUnfolderBase]: 154/564 cut-off events. [2024-10-13 12:31:47,903 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-13 12:31:47,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 564 events. 154/564 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3240 event pairs, 100 based on Foata normal form. 12/527 useless extension candidates. Maximal degree in co-relation 909. Up to 258 conditions per place. [2024-10-13 12:31:47,909 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 60 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2024-10-13 12:31:47,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 335 flow [2024-10-13 12:31:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:31:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:31:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-10-13 12:31:47,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-10-13 12:31:47,913 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 141 flow. Second operand 5 states and 235 transitions. [2024-10-13 12:31:47,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 335 flow [2024-10-13 12:31:47,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:31:47,917 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 148 flow [2024-10-13 12:31:47,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-10-13 12:31:47,919 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2024-10-13 12:31:47,920 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 148 flow [2024-10-13 12:31:47,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:31:47,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:47,920 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-13 12:31:47,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:31:47,921 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-13 12:31:47,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash -427659438, now seen corresponding path program 1 times [2024-10-13 12:31:47,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:47,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118980174] [2024-10-13 12:31:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:31:47,943 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:31:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:31:47,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:31:47,976 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:31:47,977 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-10-13 12:31:47,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2024-10-13 12:31:47,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2024-10-13 12:31:47,980 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2024-10-13 12:31:47,980 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2024-10-13 12:31:47,980 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2024-10-13 12:31:47,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2024-10-13 12:31:47,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2024-10-13 12:31:47,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2024-10-13 12:31:47,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2024-10-13 12:31:47,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2024-10-13 12:31:47,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2024-10-13 12:31:47,983 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2024-10-13 12:31:47,983 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2024-10-13 12:31:47,983 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2024-10-13 12:31:47,983 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2024-10-13 12:31:47,984 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2024-10-13 12:31:47,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:31:47,985 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-13 12:31:47,987 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:31:47,988 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:31:48,015 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 12:31:48,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 112 transitions, 240 flow [2024-10-13 12:31:48,033 INFO L124 PetriNetUnfolderBase]: 27/192 cut-off events. [2024-10-13 12:31:48,033 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 12:31:48,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 192 events. 27/192 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 942 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2024-10-13 12:31:48,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 112 transitions, 240 flow [2024-10-13 12:31:48,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 112 transitions, 240 flow [2024-10-13 12:31:48,039 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:31:48,040 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;@1bc4a16e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:31:48,040 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-10-13 12:31:48,042 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:31:48,042 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:31:48,042 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:31:48,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:48,042 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:31:48,042 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-13 12:31:48,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash 476189, now seen corresponding path program 1 times [2024-10-13 12:31:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:48,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482517999] [2024-10-13 12:31:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:48,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:48,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:48,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482517999] [2024-10-13 12:31:48,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482517999] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:48,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:48,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:31:48,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715009210] [2024-10-13 12:31:48,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:48,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:31:48,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:48,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:31:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:31:48,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 112 [2024-10-13 12:31:48,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-10-13 12:31:48,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:48,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 112 [2024-10-13 12:31:48,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:49,209 INFO L124 PetriNetUnfolderBase]: 4337/9506 cut-off events. [2024-10-13 12:31:49,213 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-10-13 12:31:49,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16495 conditions, 9506 events. 4337/9506 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 81879 event pairs, 3751 based on Foata normal form. 2040/10839 useless extension candidates. Maximal degree in co-relation 11454. Up to 6011 conditions per place. [2024-10-13 12:31:49,298 INFO L140 encePairwiseOnDemand]: 92/112 looper letters, 63 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2024-10-13 12:31:49,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 115 transitions, 376 flow [2024-10-13 12:31:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:31:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:31:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2024-10-13 12:31:49,300 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2024-10-13 12:31:49,300 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 240 flow. Second operand 3 states and 245 transitions. [2024-10-13 12:31:49,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 115 transitions, 376 flow [2024-10-13 12:31:49,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 115 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:31:49,304 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 206 flow [2024-10-13 12:31:49,304 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2024-10-13 12:31:49,305 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2024-10-13 12:31:49,305 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 206 flow [2024-10-13 12:31:49,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-10-13 12:31:49,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:49,306 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:31:49,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:31:49,306 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-13 12:31:49,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash 476190, now seen corresponding path program 1 times [2024-10-13 12:31:49,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:49,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882086678] [2024-10-13 12:31:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:49,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882086678] [2024-10-13 12:31:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882086678] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:49,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:49,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:31:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5919752] [2024-10-13 12:31:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:49,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:31:49,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:31:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:31:49,403 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 112 [2024-10-13 12:31:49,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2024-10-13 12:31:49,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:49,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 112 [2024-10-13 12:31:49,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:50,673 INFO L124 PetriNetUnfolderBase]: 4051/9339 cut-off events. [2024-10-13 12:31:50,674 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2024-10-13 12:31:50,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16043 conditions, 9339 events. 4051/9339 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 83170 event pairs, 1892 based on Foata normal form. 1/8585 useless extension candidates. Maximal degree in co-relation 13733. Up to 6452 conditions per place. [2024-10-13 12:31:50,768 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 53 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-10-13 12:31:50,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 346 flow [2024-10-13 12:31:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:31:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:31:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2024-10-13 12:31:50,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-10-13 12:31:50,770 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 206 flow. Second operand 3 states and 216 transitions. [2024-10-13 12:31:50,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 346 flow [2024-10-13 12:31:50,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 107 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:31:50,780 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 221 flow [2024-10-13 12:31:50,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2024-10-13 12:31:50,784 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2024-10-13 12:31:50,785 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 221 flow [2024-10-13 12:31:50,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2024-10-13 12:31:50,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:50,785 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-13 12:31:50,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:31:50,786 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-13 12:31:50,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:50,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1700001430, now seen corresponding path program 1 times [2024-10-13 12:31:50,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:50,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524262639] [2024-10-13 12:31:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:50,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:50,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524262639] [2024-10-13 12:31:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524262639] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:50,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:31:50,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342625603] [2024-10-13 12:31:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:50,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:31:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:31:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:31:50,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 112 [2024-10-13 12:31:50,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 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) [2024-10-13 12:31:50,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:50,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 112 [2024-10-13 12:31:50,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:51,834 INFO L124 PetriNetUnfolderBase]: 4051/9232 cut-off events. [2024-10-13 12:31:51,835 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2024-10-13 12:31:51,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16095 conditions, 9232 events. 4051/9232 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 82717 event pairs, 418 based on Foata normal form. 156/8872 useless extension candidates. Maximal degree in co-relation 14026. Up to 4883 conditions per place. [2024-10-13 12:31:51,874 INFO L140 encePairwiseOnDemand]: 107/112 looper letters, 95 selfloop transitions, 6 changer transitions 0/151 dead transitions. [2024-10-13 12:31:51,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 533 flow [2024-10-13 12:31:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:31:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:31:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2024-10-13 12:31:51,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-10-13 12:31:51,876 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 221 flow. Second operand 5 states and 362 transitions. [2024-10-13 12:31:51,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 533 flow [2024-10-13 12:31:51,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:31:51,879 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 234 flow [2024-10-13 12:31:51,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2024-10-13 12:31:51,880 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 3 predicate places. [2024-10-13 12:31:51,880 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 234 flow [2024-10-13 12:31:51,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 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) [2024-10-13 12:31:51,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:51,880 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:31:51,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:31:51,881 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-13 12:31:51,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1678539783, now seen corresponding path program 1 times [2024-10-13 12:31:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:51,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864552023] [2024-10-13 12:31:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:51,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:51,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864552023] [2024-10-13 12:31:51,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864552023] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:51,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:51,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:31:51,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187467849] [2024-10-13 12:31:51,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:51,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:31:51,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:51,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:31:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:31:51,906 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 112 [2024-10-13 12:31:51,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:31:51,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:51,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 112 [2024-10-13 12:31:51,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:52,498 INFO L124 PetriNetUnfolderBase]: 3775/8438 cut-off events. [2024-10-13 12:31:52,499 INFO L125 PetriNetUnfolderBase]: For 1556/1556 co-relation queries the response was YES. [2024-10-13 12:31:52,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15629 conditions, 8438 events. 3775/8438 cut-off events. For 1556/1556 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 71704 event pairs, 3570 based on Foata normal form. 1/7912 useless extension candidates. Maximal degree in co-relation 10819. Up to 6012 conditions per place. [2024-10-13 12:31:52,664 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 52 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2024-10-13 12:31:52,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 105 transitions, 358 flow [2024-10-13 12:31:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:31:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:31:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-10-13 12:31:52,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-10-13 12:31:52,668 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 234 flow. Second operand 3 states and 217 transitions. [2024-10-13 12:31:52,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 105 transitions, 358 flow [2024-10-13 12:31:52,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 105 transitions, 348 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-13 12:31:52,673 INFO L231 Difference]: Finished difference. Result has 101 places, 94 transitions, 222 flow [2024-10-13 12:31:52,674 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=101, PETRI_TRANSITIONS=94} [2024-10-13 12:31:52,675 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2024-10-13 12:31:52,676 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 94 transitions, 222 flow [2024-10-13 12:31:52,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:31:52,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:52,677 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:31:52,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:31:52,677 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-13 12:31:52,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:52,678 INFO L85 PathProgramCache]: Analyzing trace with hash 986554813, now seen corresponding path program 1 times [2024-10-13 12:31:52,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:52,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035318948] [2024-10-13 12:31:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:52,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:52,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:52,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035318948] [2024-10-13 12:31:52,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035318948] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:52,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:52,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:31:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455499072] [2024-10-13 12:31:52,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:52,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:31:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:31:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:31:52,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 112 [2024-10-13 12:31:52,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 94 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:31:52,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:52,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 112 [2024-10-13 12:31:52,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:54,379 INFO L124 PetriNetUnfolderBase]: 5091/10974 cut-off events. [2024-10-13 12:31:54,380 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2024-10-13 12:31:54,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20040 conditions, 10974 events. 5091/10974 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 94660 event pairs, 3903 based on Foata normal form. 0/10324 useless extension candidates. Maximal degree in co-relation 14985. Up to 6002 conditions per place. [2024-10-13 12:31:54,459 INFO L140 encePairwiseOnDemand]: 94/112 looper letters, 88 selfloop transitions, 10 changer transitions 0/139 dead transitions. [2024-10-13 12:31:54,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 139 transitions, 508 flow [2024-10-13 12:31:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:31:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:31:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 288 transitions. [2024-10-13 12:31:54,461 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-10-13 12:31:54,461 INFO L175 Difference]: Start difference. First operand has 101 places, 94 transitions, 222 flow. Second operand 4 states and 288 transitions. [2024-10-13 12:31:54,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 139 transitions, 508 flow [2024-10-13 12:31:54,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 139 transitions, 504 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:31:54,467 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 322 flow [2024-10-13 12:31:54,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=322, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-10-13 12:31:54,468 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 6 predicate places. [2024-10-13 12:31:54,468 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 322 flow [2024-10-13 12:31:54,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:31:54,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:54,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:31:54,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 12:31:54,469 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-13 12:31:54,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:54,470 INFO L85 PathProgramCache]: Analyzing trace with hash 986554814, now seen corresponding path program 1 times [2024-10-13 12:31:54,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:54,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396119956] [2024-10-13 12:31:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:54,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:54,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:54,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396119956] [2024-10-13 12:31:54,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396119956] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:54,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:54,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:31:54,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324395274] [2024-10-13 12:31:54,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:54,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:31:54,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:54,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:31:54,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:31:54,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 112 [2024-10-13 12:31:54,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2024-10-13 12:31:54,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:54,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 112 [2024-10-13 12:31:54,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:55,412 INFO L124 PetriNetUnfolderBase]: 4282/9230 cut-off events. [2024-10-13 12:31:55,413 INFO L125 PetriNetUnfolderBase]: For 2732/2816 co-relation queries the response was YES. [2024-10-13 12:31:55,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19454 conditions, 9230 events. 4282/9230 cut-off events. For 2732/2816 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 76953 event pairs, 4029 based on Foata normal form. 1617/10393 useless extension candidates. Maximal degree in co-relation 15752. Up to 6966 conditions per place. [2024-10-13 12:31:55,504 INFO L140 encePairwiseOnDemand]: 103/112 looper letters, 50 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2024-10-13 12:31:55,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 408 flow [2024-10-13 12:31:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:31:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:31:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2024-10-13 12:31:55,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-10-13 12:31:55,510 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 322 flow. Second operand 3 states and 187 transitions. [2024-10-13 12:31:55,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 408 flow [2024-10-13 12:31:55,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 94 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:31:55,520 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 306 flow [2024-10-13 12:31:55,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2024-10-13 12:31:55,522 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2024-10-13 12:31:55,522 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 306 flow [2024-10-13 12:31:55,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2024-10-13 12:31:55,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:55,523 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:31:55,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 12:31:55,523 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-13 12:31:55,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash 374026880, now seen corresponding path program 1 times [2024-10-13 12:31:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:55,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881575145] [2024-10-13 12:31:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:55,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:55,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881575145] [2024-10-13 12:31:55,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881575145] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:31:55,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448910913] [2024-10-13 12:31:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:55,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:31:55,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:31:55,583 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) [2024-10-13 12:31:55,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:31:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:55,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:31:55,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:31:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:55,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:31:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:55,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448910913] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:31:55,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:31:55,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-13 12:31:55,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179587662] [2024-10-13 12:31:55,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:31:55,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:31:55,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:31:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:31:55,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 112 [2024-10-13 12:31:55,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 306 flow. Second operand has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2024-10-13 12:31:55,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:55,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 112 [2024-10-13 12:31:55,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:31:55,999 INFO L124 PetriNetUnfolderBase]: 682/1511 cut-off events. [2024-10-13 12:31:56,000 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2024-10-13 12:31:56,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 1511 events. 682/1511 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 9042 event pairs, 108 based on Foata normal form. 0/1496 useless extension candidates. Maximal degree in co-relation 3473. Up to 816 conditions per place. [2024-10-13 12:31:56,010 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 60 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2024-10-13 12:31:56,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 366 flow [2024-10-13 12:31:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:31:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:31:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 335 transitions. [2024-10-13 12:31:56,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-10-13 12:31:56,013 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 306 flow. Second operand 5 states and 335 transitions. [2024-10-13 12:31:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 366 flow [2024-10-13 12:31:56,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 85 transitions, 363 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:31:56,016 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 148 flow [2024-10-13 12:31:56,017 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2024-10-13 12:31:56,018 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -34 predicate places. [2024-10-13 12:31:56,018 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 148 flow [2024-10-13 12:31:56,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2024-10-13 12:31:56,019 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:56,019 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-10-13 12:31:56,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 12:31:56,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 12:31:56,221 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-13 12:31:56,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash -623833567, now seen corresponding path program 1 times [2024-10-13 12:31:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:56,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483822334] [2024-10-13 12:31:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:56,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:31:56,242 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:31:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:31:56,263 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:31:56,263 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:31:56,264 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2024-10-13 12:31:56,264 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2024-10-13 12:31:56,264 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2024-10-13 12:31:56,264 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2024-10-13 12:31:56,264 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2024-10-13 12:31:56,264 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2024-10-13 12:31:56,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2024-10-13 12:31:56,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2024-10-13 12:31:56,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2024-10-13 12:31:56,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2024-10-13 12:31:56,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2024-10-13 12:31:56,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2024-10-13 12:31:56,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2024-10-13 12:31:56,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2024-10-13 12:31:56,266 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2024-10-13 12:31:56,266 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2024-10-13 12:31:56,266 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2024-10-13 12:31:56,266 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2024-10-13 12:31:56,266 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2024-10-13 12:31:56,266 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2024-10-13 12:31:56,266 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2024-10-13 12:31:56,266 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2024-10-13 12:31:56,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2024-10-13 12:31:56,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2024-10-13 12:31:56,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2024-10-13 12:31:56,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2024-10-13 12:31:56,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2024-10-13 12:31:56,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2024-10-13 12:31:56,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2024-10-13 12:31:56,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2024-10-13 12:31:56,268 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2024-10-13 12:31:56,268 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2024-10-13 12:31:56,268 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2024-10-13 12:31:56,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 12:31:56,268 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:31:56,269 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:31:56,269 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:31:56,330 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-13 12:31:56,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 149 transitions, 325 flow [2024-10-13 12:31:56,373 INFO L124 PetriNetUnfolderBase]: 42/296 cut-off events. [2024-10-13 12:31:56,374 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-13 12:31:56,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 296 events. 42/296 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1524 event pairs, 1 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 203. Up to 12 conditions per place. [2024-10-13 12:31:56,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 149 transitions, 325 flow [2024-10-13 12:31:56,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 149 transitions, 325 flow [2024-10-13 12:31:56,385 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:31:56,385 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;@1bc4a16e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:31:56,385 INFO L334 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-10-13 12:31:56,387 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:31:56,387 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:31:56,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:31:56,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:31:56,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:31:56,388 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-13 12:31:56,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:31:56,389 INFO L85 PathProgramCache]: Analyzing trace with hash 624146, now seen corresponding path program 1 times [2024-10-13 12:31:56,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:31:56,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916595118] [2024-10-13 12:31:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:31:56,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:31:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:31:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:31:56,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:31:56,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916595118] [2024-10-13 12:31:56,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916595118] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:31:56,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:31:56,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:31:56,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652687693] [2024-10-13 12:31:56,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:31:56,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:31:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:31:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:31:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:31:56,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 149 [2024-10-13 12:31:56,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 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) [2024-10-13 12:31:56,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:31:56,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 149 [2024-10-13 12:31:56,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:12,516 INFO L124 PetriNetUnfolderBase]: 81925/144110 cut-off events. [2024-10-13 12:32:12,516 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2024-10-13 12:32:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259037 conditions, 144110 events. 81925/144110 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 3098. Compared 1476527 event pairs, 70588 based on Foata normal form. 34871/170171 useless extension candidates. Maximal degree in co-relation 134248. Up to 98253 conditions per place. [2024-10-13 12:32:13,371 INFO L140 encePairwiseOnDemand]: 123/149 looper letters, 87 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2024-10-13 12:32:13,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 157 transitions, 519 flow [2024-10-13 12:32:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2024-10-13 12:32:13,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7494407158836689 [2024-10-13 12:32:13,374 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 325 flow. Second operand 3 states and 335 transitions. [2024-10-13 12:32:13,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 157 transitions, 519 flow [2024-10-13 12:32:13,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 157 transitions, 519 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:32:13,378 INFO L231 Difference]: Finished difference. Result has 130 places, 124 transitions, 279 flow [2024-10-13 12:32:13,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=130, PETRI_TRANSITIONS=124} [2024-10-13 12:32:13,380 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, -1 predicate places. [2024-10-13 12:32:13,380 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 124 transitions, 279 flow [2024-10-13 12:32:13,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 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) [2024-10-13 12:32:13,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:13,380 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:32:13,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 12:32:13,381 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-13 12:32:13,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash 624147, now seen corresponding path program 1 times [2024-10-13 12:32:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856056005] [2024-10-13 12:32:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:13,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:13,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:13,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856056005] [2024-10-13 12:32:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856056005] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:13,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:13,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:32:13,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924875418] [2024-10-13 12:32:13,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:13,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:13,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:13,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:13,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:13,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 149 [2024-10-13 12:32:13,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 124 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2024-10-13 12:32:13,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:13,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 149 [2024-10-13 12:32:13,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:25,489 INFO L124 PetriNetUnfolderBase]: 76347/138484 cut-off events. [2024-10-13 12:32:25,489 INFO L125 PetriNetUnfolderBase]: For 3814/3814 co-relation queries the response was YES. [2024-10-13 12:32:25,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247826 conditions, 138484 events. 76347/138484 cut-off events. For 3814/3814 co-relation queries the response was YES. Maximal size of possible extension queue 3118. Compared 1460448 event pairs, 49600 based on Foata normal form. 1/129226 useless extension candidates. Maximal degree in co-relation 210935. Up to 106004 conditions per place. [2024-10-13 12:32:26,588 INFO L140 encePairwiseOnDemand]: 145/149 looper letters, 66 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2024-10-13 12:32:26,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 137 transitions, 441 flow [2024-10-13 12:32:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2024-10-13 12:32:26,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6331096196868009 [2024-10-13 12:32:26,591 INFO L175 Difference]: Start difference. First operand has 130 places, 124 transitions, 279 flow. Second operand 3 states and 283 transitions. [2024-10-13 12:32:26,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 137 transitions, 441 flow [2024-10-13 12:32:26,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 137 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:32:26,945 INFO L231 Difference]: Finished difference. Result has 131 places, 125 transitions, 289 flow [2024-10-13 12:32:26,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=131, PETRI_TRANSITIONS=125} [2024-10-13 12:32:26,946 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, 0 predicate places. [2024-10-13 12:32:26,946 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 125 transitions, 289 flow [2024-10-13 12:32:26,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2024-10-13 12:32:26,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:26,947 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-13 12:32:26,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 12:32:26,947 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-13 12:32:26,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash 908074056, now seen corresponding path program 1 times [2024-10-13 12:32:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:26,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138700616] [2024-10-13 12:32:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:27,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:27,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138700616] [2024-10-13 12:32:27,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138700616] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:27,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169746222] [2024-10-13 12:32:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:27,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:27,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:27,027 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) [2024-10-13 12:32:27,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:32:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:27,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:32:27,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:27,164 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 [2024-10-13 12:32:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:27,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:27,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169746222] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:27,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:27,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-13 12:32:27,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605356516] [2024-10-13 12:32:27,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:27,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:32:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:32:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:32:27,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 149 [2024-10-13 12:32:27,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 125 transitions, 289 flow. Second operand has 8 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 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) [2024-10-13 12:32:27,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:27,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 149 [2024-10-13 12:32:27,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:39,262 INFO L124 PetriNetUnfolderBase]: 76247/138404 cut-off events. [2024-10-13 12:32:39,263 INFO L125 PetriNetUnfolderBase]: For 8630/8630 co-relation queries the response was YES. [2024-10-13 12:32:39,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249123 conditions, 138404 events. 76247/138404 cut-off events. For 8630/8630 co-relation queries the response was YES. Maximal size of possible extension queue 3199. Compared 1472386 event pairs, 15553 based on Foata normal form. 1896/132469 useless extension candidates. Maximal degree in co-relation 228256. Up to 79903 conditions per place. [2024-10-13 12:32:40,440 INFO L140 encePairwiseOnDemand]: 145/149 looper letters, 157 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2024-10-13 12:32:40,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 231 transitions, 829 flow [2024-10-13 12:32:40,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:32:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:32:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 587 transitions. [2024-10-13 12:32:40,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.656599552572707 [2024-10-13 12:32:40,442 INFO L175 Difference]: Start difference. First operand has 131 places, 125 transitions, 289 flow. Second operand 6 states and 587 transitions. [2024-10-13 12:32:40,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 231 transitions, 829 flow [2024-10-13 12:32:40,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 231 transitions, 827 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:40,450 INFO L231 Difference]: Finished difference. Result has 134 places, 126 transitions, 303 flow [2024-10-13 12:32:40,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=134, PETRI_TRANSITIONS=126} [2024-10-13 12:32:40,451 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, 3 predicate places. [2024-10-13 12:32:40,451 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 126 transitions, 303 flow [2024-10-13 12:32:40,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 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) [2024-10-13 12:32:40,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:40,451 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:32:40,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 12:32:40,652 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,SelfDestructingSolverStorable14 [2024-10-13 12:32:40,653 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-13 12:32:40,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:40,653 INFO L85 PathProgramCache]: Analyzing trace with hash -881567307, now seen corresponding path program 1 times [2024-10-13 12:32:40,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:40,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010996357] [2024-10-13 12:32:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:40,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:40,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010996357] [2024-10-13 12:32:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010996357] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:40,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:40,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496747427] [2024-10-13 12:32:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:40,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:32:40,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:40,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:32:40,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:32:40,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 149 [2024-10-13 12:32:40,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 126 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 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) [2024-10-13 12:32:40,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:40,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 149 [2024-10-13 12:32:40,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand