./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe019_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe019_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:52:19,891 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:52:19,946 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:52:19,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:52:19,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:52:19,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:52:19,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:52:19,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:52:19,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:52:19,974 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:52:19,975 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:52:19,975 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:52:19,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:52:19,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:52:19,976 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:52:19,976 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:52:19,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:52:19,988 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:52:19,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:52:19,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:52:19,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:52:19,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:52:19,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:52:19,990 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:52:19,990 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:52:19,991 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:52:19,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:52:19,991 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:52:19,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:52:19,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:52:19,992 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:52:19,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:52:19,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:52:19,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:52:19,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:52:19,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:52:19,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:52:19,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:52:19,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:52:19,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:52:19,994 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:52:19,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:52:19,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:52:19,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:52:20,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:52:20,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:52:20,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:52:20,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:52:20,257 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:52:20,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-02-07 14:52:21,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:52:21,519 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:52:21,523 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-02-07 14:52:21,545 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d29c1943/4c1ff69bcdde4670ae9e3a79a211f1a3/FLAGf2ad95f48 [2024-02-07 14:52:21,563 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d29c1943/4c1ff69bcdde4670ae9e3a79a211f1a3 [2024-02-07 14:52:21,566 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:52:21,567 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:52:21,568 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe019_power.opt.yml/witness.yml [2024-02-07 14:52:21,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:52:21,738 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:52:21,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:52:21,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:52:21,743 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:52:21,744 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:52:21" (1/2) ... [2024-02-07 14:52:21,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110365cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:52:21, skipping insertion in model container [2024-02-07 14:52:21,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:52:21" (1/2) ... [2024-02-07 14:52:21,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cf67388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:52:21, skipping insertion in model container [2024-02-07 14:52:21,747 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:52:21" (2/2) ... [2024-02-07 14:52:21,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110365cd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:21, skipping insertion in model container [2024-02-07 14:52:21,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:52:21" (2/2) ... [2024-02-07 14:52:21,748 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:52:21,947 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:52:21,949 INFO L76 edCorrectnessWitness]: Location invariant before [L860-L860] (x$r_buff1_thd4 == (_Bool)0 && x$w_buff1_used == (_Bool)1) || (x$r_buff0_thd4 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,950 INFO L76 edCorrectnessWitness]: Location invariant before [L766-L766] (((0 <= y) && (y <= 2)) && (y <= 127)) && ((y == 0 || y == 1) || y == 2) [2024-02-07 14:52:21,950 INFO L76 edCorrectnessWitness]: Location invariant before [L899-L899] (x$r_buff1_thd0 == (_Bool)0 && (x$w_buff1_used == (_Bool)1 || (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd0 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,950 INFO L76 edCorrectnessWitness]: Location invariant before [L867-L867] 0 <= __unbuffered_cnt [2024-02-07 14:52:21,950 INFO L76 edCorrectnessWitness]: Location invariant before [L802-L802] (x$r_buff0_thd3 == (_Bool)0) && (x$r_buff1_thd2 == (_Bool)0 || x$r_buff1_thd2 == (_Bool)1) [2024-02-07 14:52:21,951 INFO L76 edCorrectnessWitness]: Location invariant before [L845-L845] (x$r_buff1_thd3 == (_Bool)0 && (x$w_buff1_used == (_Bool)1 || (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd3 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,951 INFO L76 edCorrectnessWitness]: Location invariant before [L893-L893] main$tmp_guard0 == (_Bool)0 || main$tmp_guard0 == (_Bool)1 [2024-02-07 14:52:21,952 INFO L76 edCorrectnessWitness]: Location invariant before [L850-L850] 0 <= __unbuffered_cnt [2024-02-07 14:52:21,952 INFO L76 edCorrectnessWitness]: Location invariant before [L904-L904] ((((0 <= __unbuffered_p2_EAX) && (__unbuffered_p2_EAX <= 1)) && (y == 2)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && ((__unbuffered_p0_EAX == 2 && (__unbuffered_p0_EBX == 0 || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) || (((((0 <= __unbuffered_p0_EAX && 0 <= __unbuffered_p0_EBX) && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-02-07 14:52:21,952 INFO L76 edCorrectnessWitness]: Location invariant before [L832-L832] (x$w_buff0_used == (_Bool)1) && (x$r_buff1_thd3 == (_Bool)0 || x$r_buff0_thd3 == (_Bool)0) [2024-02-07 14:52:21,952 INFO L76 edCorrectnessWitness]: Location invariant before [L826-L826] (x$w_buff0_used == (_Bool)1) && (x$r_buff1_thd3 == (_Bool)0 || x$r_buff0_thd3 == (_Bool)0) [2024-02-07 14:52:21,952 INFO L76 edCorrectnessWitness]: Location invariant before [L892-L892] main$tmp_guard0 == (_Bool)0 || main$tmp_guard0 == (_Bool)1 [2024-02-07 14:52:21,952 INFO L76 edCorrectnessWitness]: Location invariant before [L825-L825] ((0 <= x$mem_tmp) && (x$mem_tmp <= 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1) [2024-02-07 14:52:21,953 INFO L76 edCorrectnessWitness]: Location invariant before [L798-L798] (x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)1) [2024-02-07 14:52:21,953 INFO L76 edCorrectnessWitness]: Location invariant before [L803-L803] (x$r_buff0_thd4 == (_Bool)0) && (x$r_buff1_thd3 == (_Bool)0) [2024-02-07 14:52:21,953 INFO L76 edCorrectnessWitness]: Location invariant before [L905-L905] main$tmp_guard1 == (_Bool)0 || main$tmp_guard1 == (_Bool)1 [2024-02-07 14:52:21,953 INFO L76 edCorrectnessWitness]: Location invariant before [L805-L805] x$r_buff0_thd2 == (_Bool)1 [2024-02-07 14:52:21,953 INFO L76 edCorrectnessWitness]: Location invariant before [L811-L811] (x$r_buff1_thd2 == (_Bool)0 || x$r_buff1_thd2 == (_Bool)1) && (((x$w_buff1_used == (_Bool)1 && (x$r_buff0_thd2 == (_Bool)0 || x$r_buff0_thd2 == (_Bool)1)) || (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) || (x$w_buff0_used == (_Bool)1 && (x$r_buff0_thd2 == (_Bool)0 || x$r_buff0_thd2 == (_Bool)1))) [2024-02-07 14:52:21,954 INFO L76 edCorrectnessWitness]: Location invariant before [L778-L778] ((((x$r_buff1_thd1 == (_Bool)0 && x$w_buff0_used == (_Bool)1) && x$w_buff1_used == (_Bool)1) || x$r_buff0_thd1 == (_Bool)0) || (((x$r_buff0_thd1 == (_Bool)0 && x$r_buff1_thd1 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd1 == (_Bool)0 && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) [2024-02-07 14:52:21,954 INFO L76 edCorrectnessWitness]: Location invariant before [L823-L823] weak$$choice2 == (_Bool)0 || weak$$choice2 == (_Bool)1 [2024-02-07 14:52:21,954 INFO L76 edCorrectnessWitness]: Location invariant before [L810-L810] (x$w_buff0_used == (_Bool)1) && (x$r_buff0_thd2 == (_Bool)0 || x$r_buff0_thd2 == (_Bool)1) [2024-02-07 14:52:21,954 INFO L76 edCorrectnessWitness]: Location invariant before [L775-L775] ((((x$r_buff1_thd1 == (_Bool)0 && x$w_buff0_used == (_Bool)1) && x$w_buff1_used == (_Bool)1) || x$r_buff0_thd1 == (_Bool)0) || (((x$r_buff0_thd1 == (_Bool)0 && x$r_buff1_thd1 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd1 == (_Bool)0 && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) [2024-02-07 14:52:21,955 INFO L76 edCorrectnessWitness]: Location invariant before [L858-L858] y == 2 [2024-02-07 14:52:21,955 INFO L76 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((0 <= x) && (0 <= *__unbuffered_p2_EAX$read_delayed_var)) && (x <= 1)) && (*__unbuffered_p2_EAX$read_delayed_var <= 1)) && (__unbuffered_p2_EAX$read_delayed_var == & x)) && (x == 0 || x == 1)) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) [2024-02-07 14:52:21,955 INFO L76 edCorrectnessWitness]: Location invariant before [L861-L861] (x$r_buff0_thd4 == (_Bool)0) && (x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,955 INFO L76 edCorrectnessWitness]: Location invariant before [L831-L831] (x$w_buff0_used == (_Bool)1) && (x$r_buff1_thd3 == (_Bool)0 || x$r_buff0_thd3 == (_Bool)0) [2024-02-07 14:52:21,955 INFO L76 edCorrectnessWitness]: Location invariant before [L891-L891] 0 <= __unbuffered_cnt [2024-02-07 14:52:21,956 INFO L76 edCorrectnessWitness]: Location invariant before [L895-L895] (x$r_buff1_thd0 == (_Bool)0 && x$w_buff1_used == (_Bool)1) || (x$r_buff0_thd0 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,956 INFO L76 edCorrectnessWitness]: Location invariant before [L896-L896] (x$r_buff0_thd0 == (_Bool)0) && (x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,956 INFO L76 edCorrectnessWitness]: Location invariant before [L801-L801] (x$r_buff1_thd1 == (_Bool)0) && (x$r_buff0_thd2 == (_Bool)0 || x$r_buff0_thd2 == (_Bool)1) [2024-02-07 14:52:21,956 INFO L76 edCorrectnessWitness]: Location invariant before [L848-L848] x$r_buff1_thd3 == (_Bool)0 [2024-02-07 14:52:21,956 INFO L76 edCorrectnessWitness]: Location invariant before [L777-L777] ((((x$r_buff1_thd1 == (_Bool)0 && x$w_buff0_used == (_Bool)1) && x$w_buff1_used == (_Bool)1) || x$r_buff0_thd1 == (_Bool)0) || (((x$r_buff0_thd1 == (_Bool)0 && x$r_buff1_thd1 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd1 == (_Bool)0 && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) [2024-02-07 14:52:21,956 INFO L76 edCorrectnessWitness]: Location invariant before [L788-L788] 1 <= __unbuffered_cnt [2024-02-07 14:52:21,957 INFO L76 edCorrectnessWitness]: Location invariant before [L906-L906] main$tmp_guard1 == (_Bool)0 || main$tmp_guard1 == (_Bool)1 [2024-02-07 14:52:21,957 INFO L76 edCorrectnessWitness]: Location invariant before [L862-L862] (x$r_buff1_thd4 == (_Bool)0 && (x$w_buff1_used == (_Bool)1 || (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd4 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,957 INFO L76 edCorrectnessWitness]: Location invariant before [L837-L837] ((0 <= x) && (x <= 1)) && (x == 0 || x == 1) [2024-02-07 14:52:21,957 INFO L76 edCorrectnessWitness]: Location invariant before [L851-L851] 1 <= __unbuffered_cnt [2024-02-07 14:52:21,958 INFO L76 edCorrectnessWitness]: Location invariant before [L779-L779] ((((x$r_buff1_thd1 == (_Bool)0 && x$w_buff0_used == (_Bool)1) && x$w_buff1_used == (_Bool)1) || x$r_buff0_thd1 == (_Bool)0) || (((x$r_buff0_thd1 == (_Bool)0 && x$r_buff1_thd1 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd1 == (_Bool)0 && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) [2024-02-07 14:52:21,959 INFO L76 edCorrectnessWitness]: Location invariant before [L808-L808] (x$w_buff0_used == (_Bool)1) && (x$r_buff0_thd2 == (_Bool)0 || x$r_buff0_thd2 == (_Bool)1) [2024-02-07 14:52:21,959 INFO L76 edCorrectnessWitness]: Location invariant before [L828-L828] (x$w_buff0_used == (_Bool)1) && (x$r_buff1_thd3 == (_Bool)0 || x$r_buff0_thd3 == (_Bool)0) [2024-02-07 14:52:21,959 INFO L76 edCorrectnessWitness]: Location invariant before [L847-L847] (x$r_buff1_thd3 == (_Bool)0 && (x$w_buff1_used == (_Bool)1 || (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd3 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,960 INFO L76 edCorrectnessWitness]: Location invariant before [L19-L19] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 14:52:21,960 INFO L76 edCorrectnessWitness]: Location invariant before [L807-L807] (x$w_buff1_used == (_Bool)1 && (x$r_buff1_thd2 == (_Bool)0 || x$r_buff1_thd2 == (_Bool)1)) || (x$w_buff0_used == (_Bool)1 && (x$r_buff0_thd2 == (_Bool)0 || x$r_buff0_thd2 == (_Bool)1)) [2024-02-07 14:52:21,960 INFO L76 edCorrectnessWitness]: Location invariant before [L830-L830] (x$w_buff0_used == (_Bool)1) && (x$r_buff1_thd3 == (_Bool)0 || x$r_buff0_thd3 == (_Bool)0) [2024-02-07 14:52:21,960 INFO L76 edCorrectnessWitness]: Location invariant before [L780-L780] (((0 <= x) && (x <= 1)) && (x$r_buff1_thd1 == (_Bool)0)) && (x == 0 || x == 1) [2024-02-07 14:52:21,960 INFO L76 edCorrectnessWitness]: Location invariant before [L800-L800] (x$r_buff0_thd1 == (_Bool)0) && (x$r_buff1_thd0 == (_Bool)0) [2024-02-07 14:52:21,960 INFO L76 edCorrectnessWitness]: Location invariant before [L783-L783] x$flush_delayed == (_Bool)0 [2024-02-07 14:52:21,961 INFO L76 edCorrectnessWitness]: Location invariant before [L782-L782] ((0 <= x) && (x <= 1)) && (x == 0 || x == 1) [2024-02-07 14:52:21,961 INFO L76 edCorrectnessWitness]: Location invariant before [L824-L824] (((0 <= x) && (x <= 1)) && (x == 0 || x == 1)) && (x$flush_delayed == (_Bool)0 || x$flush_delayed == (_Bool)1) [2024-02-07 14:52:21,961 INFO L76 edCorrectnessWitness]: Location invariant before [L797-L797] x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1 [2024-02-07 14:52:21,961 INFO L76 edCorrectnessWitness]: Location invariant before [L771-L771] weak$$choice2 == (_Bool)0 || weak$$choice2 == (_Bool)1 [2024-02-07 14:52:21,962 INFO L76 edCorrectnessWitness]: Location invariant before [L865-L865] x$r_buff1_thd4 == (_Bool)0 [2024-02-07 14:52:21,962 INFO L76 edCorrectnessWitness]: Location invariant before [L809-L809] (x$r_buff1_thd2 == (_Bool)0 || x$r_buff1_thd2 == (_Bool)1) && (((x$w_buff1_used == (_Bool)1 && (x$r_buff0_thd2 == (_Bool)0 || x$r_buff0_thd2 == (_Bool)1)) || (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) || (x$w_buff0_used == (_Bool)1 && (x$r_buff0_thd2 == (_Bool)0 || x$r_buff0_thd2 == (_Bool)1))) [2024-02-07 14:52:21,962 INFO L76 edCorrectnessWitness]: Location invariant before [L799-L799] x$r_buff0_thd0 == (_Bool)0 [2024-02-07 14:52:21,962 INFO L76 edCorrectnessWitness]: Location invariant before [L863-L863] (x$r_buff0_thd4 == (_Bool)0) && (x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,963 INFO L76 edCorrectnessWitness]: Location invariant before [L772-L772] (((0 <= x) && (x <= 1)) && (x == 0 || x == 1)) && (x$flush_delayed == (_Bool)0 || x$flush_delayed == (_Bool)1) [2024-02-07 14:52:21,963 INFO L76 edCorrectnessWitness]: Location invariant before [L864-L864] (x$r_buff1_thd4 == (_Bool)0 && (x$w_buff1_used == (_Bool)1 || (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd4 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,963 INFO L76 edCorrectnessWitness]: Location invariant before [L814-L814] 0 <= __unbuffered_cnt [2024-02-07 14:52:21,964 INFO L76 edCorrectnessWitness]: Location invariant before [L838-L838] x$flush_delayed == (_Bool)0 [2024-02-07 14:52:21,964 INFO L76 edCorrectnessWitness]: Location invariant before [L804-L804] x$r_buff1_thd4 == (_Bool)0 [2024-02-07 14:52:21,964 INFO L76 edCorrectnessWitness]: Location invariant before [L868-L868] 1 <= __unbuffered_cnt [2024-02-07 14:52:21,964 INFO L76 edCorrectnessWitness]: Location invariant before [L897-L897] (x$r_buff1_thd0 == (_Bool)0 && (x$w_buff1_used == (_Bool)1 || (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd0 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,964 INFO L76 edCorrectnessWitness]: Location invariant before [L773-L773] ((((x$r_buff1_thd1 == (_Bool)0 && x$w_buff0_used == (_Bool)1) && x$w_buff1_used == (_Bool)1) || x$r_buff0_thd1 == (_Bool)0) || (((x$r_buff0_thd1 == (_Bool)0 && x$r_buff1_thd1 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd1 == (_Bool)0 && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) [2024-02-07 14:52:21,964 INFO L76 edCorrectnessWitness]: Location invariant before [L829-L829] (((((x$r_buff1_thd3 == (_Bool)0 && x$w_buff0_used == (_Bool)1) || (weak$$choice0 == (_Bool)0 && (weak$$choice1 == (_Bool)0 || weak$$choice1 == (_Bool)1))) || (((x$r_buff0_thd3 == (_Bool)0 && x$r_buff1_thd3 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && x$w_buff1_used == (_Bool)1)) || (((x$r_buff0_thd3 == (_Bool)0 && x$r_buff1_thd3 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (((x$r_buff0_thd3 == (_Bool)0 && x$r_buff1_thd3 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd3 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,964 INFO L76 edCorrectnessWitness]: Location invariant before [L796-L796] (x$w_buff0 == 1) && (x$w_buff0_used == (_Bool)0 || x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,965 INFO L76 edCorrectnessWitness]: Location invariant before [L834-L834] __unbuffered_p2_EAX$read_delayed == (_Bool)1 [2024-02-07 14:52:21,965 INFO L76 edCorrectnessWitness]: Location invariant before [L844-L844] (x$r_buff0_thd3 == (_Bool)0) && (x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,965 INFO L76 edCorrectnessWitness]: Location invariant before [L795-L795] ((0 <= x$w_buff1) && (x$w_buff1 <= 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1) [2024-02-07 14:52:21,965 INFO L76 edCorrectnessWitness]: Location invariant before [L841-L841] y == 1 [2024-02-07 14:52:21,965 INFO L76 edCorrectnessWitness]: Location invariant before [L770-L770] weak$$choice0 == (_Bool)0 || weak$$choice0 == (_Bool)1 [2024-02-07 14:52:21,965 INFO L76 edCorrectnessWitness]: Location invariant before [L787-L787] 0 <= __unbuffered_cnt [2024-02-07 14:52:21,965 INFO L76 edCorrectnessWitness]: Location invariant before [L776-L776] ((((x$r_buff1_thd1 == (_Bool)0 && x$w_buff0_used == (_Bool)1) && x$w_buff1_used == (_Bool)1) || x$r_buff0_thd1 == (_Bool)0) || (((x$r_buff0_thd1 == (_Bool)0 && x$r_buff1_thd1 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd1 == (_Bool)0 && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) [2024-02-07 14:52:21,965 INFO L76 edCorrectnessWitness]: Location invariant before [L898-L898] (x$r_buff0_thd0 == (_Bool)0) && (x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,966 INFO L76 edCorrectnessWitness]: Location invariant before [L822-L822] weak$$choice0 == (_Bool)0 || weak$$choice0 == (_Bool)1 [2024-02-07 14:52:21,966 INFO L76 edCorrectnessWitness]: Location invariant before [L815-L815] 1 <= __unbuffered_cnt [2024-02-07 14:52:21,966 INFO L76 edCorrectnessWitness]: Location invariant before [L827-L827] (x$w_buff0_used == (_Bool)1) && (x$r_buff1_thd3 == (_Bool)0 || x$r_buff0_thd3 == (_Bool)0) [2024-02-07 14:52:21,966 INFO L76 edCorrectnessWitness]: Location invariant before [L846-L846] (x$r_buff0_thd3 == (_Bool)0) && (x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,966 INFO L76 edCorrectnessWitness]: Location invariant before [L767-L767] (((0 <= __unbuffered_p0_EAX) && (__unbuffered_p0_EAX <= 2)) && (__unbuffered_p0_EAX <= 127)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2) [2024-02-07 14:52:21,967 INFO L76 edCorrectnessWitness]: Location invariant before [L883-L883] ((((0LL - (long long )x$w_buff0_used) + (long long )x$w_buff1_used >= 0LL) && ((long long )x$w_buff0_used + (long long )x$w_buff1_used >= 0LL)) && ((0LL - (long long )x$w_buff0_used) - (long long )x$w_buff1_used >= 0LL)) && ((long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) [2024-02-07 14:52:21,967 INFO L76 edCorrectnessWitness]: Location invariant before [L843-L843] (x$r_buff1_thd3 == (_Bool)0 && x$w_buff1_used == (_Bool)1) || (x$r_buff0_thd3 == (_Bool)0 && x$w_buff0_used == (_Bool)1) [2024-02-07 14:52:21,967 INFO L76 edCorrectnessWitness]: Location invariant before [L833-L833] x$r_buff1_thd3 == (_Bool)0 [2024-02-07 14:52:21,967 INFO L76 edCorrectnessWitness]: Location invariant before [L774-L774] ((((x$r_buff1_thd1 == (_Bool)0 && x$w_buff0_used == (_Bool)1) && x$w_buff1_used == (_Bool)1) || x$r_buff0_thd1 == (_Bool)0) || (((x$r_buff0_thd1 == (_Bool)0 && x$r_buff1_thd1 == (_Bool)0) && x$w_buff0_used == (_Bool)1) && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1))) || (x$r_buff0_thd1 == (_Bool)0 && (x$w_buff1_used == (_Bool)0 || x$w_buff1_used == (_Bool)1)) [2024-02-07 14:52:21,967 INFO L76 edCorrectnessWitness]: Location invariant before [L900-L900] x$r_buff1_thd0 == (_Bool)0 [2024-02-07 14:52:21,967 INFO L76 edCorrectnessWitness]: Location invariant before [L794-L794] ((0 <= x$w_buff0) && (x$w_buff0 <= 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1) [2024-02-07 14:52:21,967 INFO L76 edCorrectnessWitness]: Location invariant before [L812-L812] x$r_buff1_thd2 == (_Bool)0 || x$r_buff1_thd2 == (_Bool)1 [2024-02-07 14:52:22,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:52:22,176 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i[994,1007] [2024-02-07 14:52:22,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:52:22,387 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:52:22,425 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i[994,1007] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:52:22,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:52:22,607 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:52:22,609 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22 WrapperNode [2024-02-07 14:52:22,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:52:22,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:52:22,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:52:22,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:52:22,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,692 INFO L138 Inliner]: procedures = 177, calls = 116, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 228 [2024-02-07 14:52:22,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:52:22,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:52:22,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:52:22,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:52:22,702 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,709 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,744 INFO L175 MemorySlicer]: Split 58 memory accesses to 6 slices as follows [2, 1, 52, 1, 1, 1]. 90 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1, 0, 0, 0]. The 12 writes are split as follows [0, 1, 8, 1, 1, 1]. [2024-02-07 14:52:22,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,780 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,783 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,797 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:52:22,799 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:52:22,799 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:52:22,799 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:52:22,800 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (1/1) ... [2024-02-07 14:52:22,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:52:22,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:52:22,827 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) [2024-02-07 14:52:22,847 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 [2024-02-07 14:52:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:52:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:52:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:52:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:52:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:52:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-02-07 14:52:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:52:22,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:52:22,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:52:22,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:52:22,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:52:22,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-02-07 14:52:22,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:52:22,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:52:22,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:52:22,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:52:22,862 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-02-07 14:52:22,862 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-02-07 14:52:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-02-07 14:52:22,863 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-02-07 14:52:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-02-07 14:52:22,863 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-02-07 14:52:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-02-07 14:52:22,863 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-02-07 14:52:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:52:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:52:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:52:22,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:52:22,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:52:22,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-02-07 14:52:22,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:52:22,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:52:22,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:52:22,866 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:52:22,997 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:52:23,000 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:52:23,731 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:52:23,731 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:52:24,807 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:52:24,807 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-07 14:52:24,807 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:52:24 BoogieIcfgContainer [2024-02-07 14:52:24,808 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:52:24,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:52:24,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:52:24,815 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:52:24,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:52:21" (1/4) ... [2024-02-07 14:52:24,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26347280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:52:24, skipping insertion in model container [2024-02-07 14:52:24,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:52:21" (2/4) ... [2024-02-07 14:52:24,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26347280 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:52:24, skipping insertion in model container [2024-02-07 14:52:24,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:52:22" (3/4) ... [2024-02-07 14:52:24,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26347280 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:52:24, skipping insertion in model container [2024-02-07 14:52:24,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:52:24" (4/4) ... [2024-02-07 14:52:24,819 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2024-02-07 14:52:24,836 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:52:24,836 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 88 error locations. [2024-02-07 14:52:24,836 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:52:25,073 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:52:25,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 134 transitions, 284 flow [2024-02-07 14:52:25,146 INFO L124 PetriNetUnfolderBase]: 1/130 cut-off events. [2024-02-07 14:52:25,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:52:25,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 130 events. 1/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 678 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 132. Up to 2 conditions per place. [2024-02-07 14:52:25,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 134 transitions, 284 flow [2024-02-07 14:52:25,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 130 transitions, 272 flow [2024-02-07 14:52:25,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:52:25,216 INFO L357 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, mHoare=false, 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;@4f7f0ba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:52:25,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 165 error locations. [2024-02-07 14:52:25,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:52:25,219 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:52:25,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:52:25,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:52:25,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:52:25,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 162 more)] === [2024-02-07 14:52:25,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:52:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash 48552, now seen corresponding path program 1 times [2024-02-07 14:52:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:52:25,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675392629] [2024-02-07 14:52:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:52:25,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:52:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:52:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:52:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:52:25,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675392629] [2024-02-07 14:52:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675392629] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:52:25,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:52:25,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:52:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868021580] [2024-02-07 14:52:25,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:52:25,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:52:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:52:25,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:52:25,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:52:25,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 134 [2024-02-07 14:52:25,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 130 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:52:25,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:52:25,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 134 [2024-02-07 14:52:25,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:52:41,515 INFO L124 PetriNetUnfolderBase]: 77762/118885 cut-off events. [2024-02-07 14:52:41,516 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-02-07 14:52:41,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226234 conditions, 118885 events. 77762/118885 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 5960. Compared 1051743 event pairs, 33140 based on Foata normal form. 1989/57746 useless extension candidates. Maximal degree in co-relation 226220. Up to 97597 conditions per place. [2024-02-07 14:52:42,496 INFO L140 encePairwiseOnDemand]: 73/134 looper letters, 83 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2024-02-07 14:52:42,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 97 transitions, 382 flow [2024-02-07 14:52:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:52:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:52:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-02-07 14:52:42,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422885572139303 [2024-02-07 14:52:42,508 INFO L175 Difference]: Start difference. First operand has 142 places, 130 transitions, 272 flow. Second operand 3 states and 218 transitions. [2024-02-07 14:52:42,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 97 transitions, 382 flow [2024-02-07 14:52:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 97 transitions, 376 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:52:42,527 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 178 flow [2024-02-07 14:52:42,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2024-02-07 14:52:42,531 INFO L281 CegarLoopForPetriNet]: 142 programPoint places, -59 predicate places. [2024-02-07 14:52:42,531 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 178 flow [2024-02-07 14:52:42,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:52:42,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:52:42,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:52:42,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:52:42,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 162 more)] === [2024-02-07 14:52:42,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:52:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1448118451, now seen corresponding path program 1 times [2024-02-07 14:52:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:52:42,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559559964] [2024-02-07 14:52:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:52:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:52:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:52:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:52:42,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:52:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559559964] [2024-02-07 14:52:42,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559559964] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:52:42,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:52:42,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:52:42,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696310481] [2024-02-07 14:52:42,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:52:42,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:52:42,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:52:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:52:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:52:42,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 134 [2024-02-07 14:52:42,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-02-07 14:52:42,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:52:42,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 134 [2024-02-07 14:52:42,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand