./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce37da4bed964b4727d03a98278bc58de76d7006f2d65a8a42fb0f55b5b34a9c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:46:06,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:46:06,991 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 18:46:07,000 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:46:07,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:46:07,046 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:46:07,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:46:07,047 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:46:07,048 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:46:07,048 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:46:07,048 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:46:07,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:46:07,049 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:46:07,050 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:46:07,050 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:46:07,050 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:46:07,051 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 18:46:07,051 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:46:07,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:46:07,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:46:07,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:46:07,053 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 18:46:07,053 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:46:07,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 18:46:07,054 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:46:07,054 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:46:07,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 18:46:07,055 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:46:07,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:46:07,055 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:46:07,056 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:46:07,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:46:07,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:46:07,061 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:46:07,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:46:07,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 18:46:07,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:46:07,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:46:07,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:46:07,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:46:07,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:46:07,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:46:07,078 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce37da4bed964b4727d03a98278bc58de76d7006f2d65a8a42fb0f55b5b34a9c [2024-11-08 18:46:07,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:46:07,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:46:07,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:46:07,435 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:46:07,436 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:46:07,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i Unable to find full path for "g++" [2024-11-08 18:46:09,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:46:09,618 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:46:09,619 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2024-11-08 18:46:09,638 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/data/4088fa782/903d82591b794c77ba2c0f89f62689b3/FLAGf5f014ad0 [2024-11-08 18:46:09,653 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/data/4088fa782/903d82591b794c77ba2c0f89f62689b3 [2024-11-08 18:46:09,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:46:09,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:46:09,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:46:09,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:46:09,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:46:09,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:46:09" (1/1) ... [2024-11-08 18:46:09,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a9b8fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:09, skipping insertion in model container [2024-11-08 18:46:09,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:46:09" (1/1) ... [2024-11-08 18:46:09,742 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:46:10,316 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[39732,39745] [2024-11-08 18:46:10,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:46:10,391 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:46:10,458 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[39732,39745] [2024-11-08 18:46:10,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:46:10,555 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:46:10,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10 WrapperNode [2024-11-08 18:46:10,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:46:10,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:46:10,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:46:10,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:46:10,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,594 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,631 INFO L138 Inliner]: procedures = 252, calls = 52, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 164 [2024-11-08 18:46:10,633 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:46:10,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:46:10,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:46:10,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:46:10,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,656 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,688 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 2, 5, 5]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 0, 5, 5]. The 1 writes are split as follows [0, 0, 1, 0, 0]. [2024-11-08 18:46:10,689 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,689 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,717 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,719 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,720 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,726 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:46:10,731 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:46:10,731 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:46:10,731 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:46:10,732 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (1/1) ... [2024-11-08 18:46:10,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:46:10,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:46:10,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:46:10,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb685bfb-b718-4381-9170-28e0a7d7dbf4/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:46:10,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 18:46:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 18:46:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 18:46:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:46:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:46:10,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 18:46:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 18:46:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 18:46:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:46:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:46:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 18:46:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 18:46:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 18:46:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 18:46:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:46:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-08 18:46:10,816 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-08 18:46:10,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:46:10,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:46:10,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 18:46:10,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 18:46:10,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 18:46:10,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:46:10,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:46:10,821 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:46:11,044 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:46:11,047 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:46:11,420 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:46:11,420 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:46:11,677 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:46:11,678 INFO L316 CfgBuilder]: Removed 14 assume(true) statements. [2024-11-08 18:46:11,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:46:11 BoogieIcfgContainer [2024-11-08 18:46:11,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:46:11,680 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:46:11,680 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:46:11,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:46:11,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:46:09" (1/3) ... [2024-11-08 18:46:11,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e848fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:46:11, skipping insertion in model container [2024-11-08 18:46:11,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:46:10" (2/3) ... [2024-11-08 18:46:11,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e848fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:46:11, skipping insertion in model container [2024-11-08 18:46:11,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:46:11" (3/3) ... [2024-11-08 18:46:11,697 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2024-11-08 18:46:11,719 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:46:11,719 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 18:46:11,719 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:46:11,782 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-08 18:46:11,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 85 transitions, 177 flow [2024-11-08 18:46:11,911 INFO L124 PetriNetUnfolderBase]: 24/115 cut-off events. [2024-11-08 18:46:11,913 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 18:46:11,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 115 events. 24/115 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 386 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2024-11-08 18:46:11,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 85 transitions, 177 flow [2024-11-08 18:46:11,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 83 transitions, 170 flow [2024-11-08 18:46:11,943 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:46:11,951 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=LoopHeads, 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;@2b0b8402, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:46:11,951 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 18:46:11,969 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:46:11,969 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2024-11-08 18:46:11,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:46:11,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:46:11,970 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-08 18:46:11,971 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:46:11,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:46:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash -292392719, now seen corresponding path program 1 times [2024-11-08 18:46:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:46:11,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628031046] [2024-11-08 18:46:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:46:11,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:46:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 18:46:12,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 18:46:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 18:46:12,274 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 18:46:12,276 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 18:46:12,278 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-08 18:46:12,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-08 18:46:12,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:46:12,282 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-08 18:46:12,290 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-08 18:46:12,290 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-08 18:46:12,342 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 18:46:12,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 136 transitions, 288 flow [2024-11-08 18:46:12,416 INFO L124 PetriNetUnfolderBase]: 45/206 cut-off events. [2024-11-08 18:46:12,416 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-08 18:46:12,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 206 events. 45/206 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 859 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2024-11-08 18:46:12,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 136 transitions, 288 flow [2024-11-08 18:46:12,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 136 transitions, 288 flow [2024-11-08 18:46:12,427 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:46:12,429 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=LoopHeads, 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;@2b0b8402, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:46:12,429 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 18:46:12,440 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:46:12,440 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2024-11-08 18:46:12,440 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 18:46:12,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:46:12,440 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-08 18:46:12,441 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:46:12,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:46:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash -423332689, now seen corresponding path program 1 times [2024-11-08 18:46:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:46:12,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633299311] [2024-11-08 18:46:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:46:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:46:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 18:46:12,491 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 18:46:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 18:46:12,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 18:46:12,548 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 18:46:12,548 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-08 18:46:12,549 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-08 18:46:12,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:46:12,549 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-08 18:46:12,550 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-08 18:46:12,550 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-08 18:46:12,631 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 18:46:12,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 187 transitions, 401 flow [2024-11-08 18:46:12,765 INFO L124 PetriNetUnfolderBase]: 71/314 cut-off events. [2024-11-08 18:46:12,766 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-08 18:46:12,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 314 events. 71/314 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1415 event pairs, 1 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2024-11-08 18:46:12,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 187 transitions, 401 flow [2024-11-08 18:46:12,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 187 transitions, 401 flow [2024-11-08 18:46:12,778 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:46:12,779 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=LoopHeads, 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;@2b0b8402, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:46:12,780 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 18:46:12,787 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:46:12,788 INFO L124 PetriNetUnfolderBase]: 5/62 cut-off events. [2024-11-08 18:46:12,788 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-08 18:46:12,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:46:12,788 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:46:12,789 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:46:12,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:46:12,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1343526543, now seen corresponding path program 1 times [2024-11-08 18:46:12,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:46:12,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684348806] [2024-11-08 18:46:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:46:12,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:46:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:46:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:46:12,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:46:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684348806] [2024-11-08 18:46:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684348806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:46:12,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:46:12,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:46:12,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3504220] [2024-11-08 18:46:12,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:46:12,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:46:12,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:46:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:46:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:46:13,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 187 [2024-11-08 18:46:13,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 187 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:46:13,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:46:13,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 187 [2024-11-08 18:46:13,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand