./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8f99c9b906e0ce9dfb5a1fdac7e796a2c68c541e986f60427db8a196999b6c01 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:22,498 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:22,576 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:12:22,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:22,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:22,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:22,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:22,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:22,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:22,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:22,613 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:22,613 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:22,614 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:22,614 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:12:22,615 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:22,616 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:22,616 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:12:22,617 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:12:22,617 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:22,618 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:12:22,619 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:12:22,620 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:12:22,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:22,621 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:12:22,622 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:12:22,622 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:22,623 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:12:22,623 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:22,624 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:12:22,624 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:12:22,625 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:22,625 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:22,626 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:22,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:22,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:22,627 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:22,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:22,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:12:22,644 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:12:22,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:12:22,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:22,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:12:22,646 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:22,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:22,646 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f99c9b906e0ce9dfb5a1fdac7e796a2c68c541e986f60427db8a196999b6c01 [2023-11-23 21:12:22,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:22,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:22,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:22,952 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:22,953 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:22,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c [2023-11-23 21:12:26,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:26,437 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:26,437 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c [2023-11-23 21:12:26,463 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/data/84634828f/9e443afdebee43548db48c2f3053af7c/FLAG52d3d06d1 [2023-11-23 21:12:26,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/data/84634828f/9e443afdebee43548db48c2f3053af7c [2023-11-23 21:12:26,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:26,484 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:26,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:26,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:26,507 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:26,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:26" (1/1) ... [2023-11-23 21:12:26,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d08795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:26, skipping insertion in model container [2023-11-23 21:12:26,513 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:26" (1/1) ... [2023-11-23 21:12:26,587 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:26,814 WARN L240 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_e95e5d67-a604-404a-bd64-1c1fbeee2474/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c[1173,1186] [2023-11-23 21:12:27,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:27,291 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:27,305 WARN L240 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_e95e5d67-a604-404a-bd64-1c1fbeee2474/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c[1173,1186] [2023-11-23 21:12:27,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:27,646 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:27,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27 WrapperNode [2023-11-23 21:12:27,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:27,648 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:27,648 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:27,648 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:27,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:27,736 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:28,531 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 6069 [2023-11-23 21:12:28,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:28,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:28,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:28,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:28,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:28,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:28,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:28,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:29,061 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:29,110 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:29,225 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:29,252 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:29,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:29,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:29,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:29,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:29,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (1/1) ... [2023-11-23 21:12:29,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:29,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:29,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:29,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:12:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:30,088 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:30,091 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:35,592 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:12:46,771 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:12:46,771 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:12:46,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:46 BoogieIcfgContainer [2023-11-23 21:12:46,773 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:12:46,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:12:46,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:12:46,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:12:46,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:26" (1/3) ... [2023-11-23 21:12:46,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bf6d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:46, skipping insertion in model container [2023-11-23 21:12:46,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:27" (2/3) ... [2023-11-23 21:12:46,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bf6d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:46, skipping insertion in model container [2023-11-23 21:12:46,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:46" (3/3) ... [2023-11-23 21:12:46,784 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.4.prop1-func-interl.c [2023-11-23 21:12:46,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:12:46,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:12:46,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:12:46,997 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@226b3707, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:12:46,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:12:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-11-23 21:12:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:12:47,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:47,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:12:47,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:47,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash 234588570, now seen corresponding path program 1 times [2023-11-23 21:12:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:47,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709757976] [2023-11-23 21:12:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:12:48,045 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:12:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:12:48,624 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:12:48,627 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:12:48,628 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 21:12:48,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:48,638 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 21:12:48,648 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:12:48,719 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-11-23 21:12:48,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:12:48 BoogieIcfgContainer [2023-11-23 21:12:48,750 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:12:48,753 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:12:48,754 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:12:48,754 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:12:48,755 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:46" (3/4) ... [2023-11-23 21:12:48,757 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:12:48,759 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:12:48,761 INFO L158 Benchmark]: Toolchain (without parser) took 22276.38ms. Allocated memory was 169.9MB in the beginning and 4.1GB in the end (delta: 3.9GB). Free memory was 138.2MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 368.3MB. Max. memory is 16.1GB. [2023-11-23 21:12:48,762 INFO L158 Benchmark]: CDTParser took 1.05ms. Allocated memory is still 127.9MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:12:48,763 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1161.73ms. Allocated memory is still 169.9MB. Free memory was 138.0MB in the beginning and 109.7MB in the end (delta: 28.3MB). Peak memory consumption was 71.3MB. Max. memory is 16.1GB. [2023-11-23 21:12:48,764 INFO L158 Benchmark]: Boogie Procedure Inliner took 883.17ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 109.7MB in the beginning and 135.2MB in the end (delta: -25.5MB). Peak memory consumption was 138.1MB. Max. memory is 16.1GB. [2023-11-23 21:12:48,770 INFO L158 Benchmark]: Boogie Preprocessor took 900.13ms. Allocated memory is still 260.0MB. Free memory was 135.2MB in the beginning and 98.4MB in the end (delta: 36.7MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. [2023-11-23 21:12:48,772 INFO L158 Benchmark]: RCFGBuilder took 17339.95ms. Allocated memory was 260.0MB in the beginning and 2.3GB in the end (delta: 2.0GB). Free memory was 98.4MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 736.1MB. Max. memory is 16.1GB. [2023-11-23 21:12:48,774 INFO L158 Benchmark]: TraceAbstraction took 1973.93ms. Allocated memory was 2.3GB in the beginning and 4.1GB in the end (delta: 1.8GB). Free memory was 1.7GB in the beginning and 3.7GB in the end (delta: -2.0GB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:12:48,775 INFO L158 Benchmark]: Witness Printer took 5.60ms. Allocated memory is still 4.1GB. Free memory is still 3.7GB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:12:48,784 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.05ms. Allocated memory is still 127.9MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1161.73ms. Allocated memory is still 169.9MB. Free memory was 138.0MB in the beginning and 109.7MB in the end (delta: 28.3MB). Peak memory consumption was 71.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 883.17ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 109.7MB in the beginning and 135.2MB in the end (delta: -25.5MB). Peak memory consumption was 138.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 900.13ms. Allocated memory is still 260.0MB. Free memory was 135.2MB in the beginning and 98.4MB in the end (delta: 36.7MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. * RCFGBuilder took 17339.95ms. Allocated memory was 260.0MB in the beginning and 2.3GB in the end (delta: 2.0GB). Free memory was 98.4MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 736.1MB. Max. memory is 16.1GB. * TraceAbstraction took 1973.93ms. Allocated memory was 2.3GB in the beginning and 4.1GB in the end (delta: 1.8GB). Free memory was 1.7GB in the beginning and 3.7GB in the end (delta: -2.0GB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.60ms. Allocated memory is still 4.1GB. Free memory is still 3.7GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 163. Possible FailurePath: [L26] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L27] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L29] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L30] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L32] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L33] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L35] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L36] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L38] const SORT_2 var_5 = 0; [L39] const SORT_1 var_30 = 0; [L40] const SORT_4 var_63 = 1; [L41] const SORT_4 var_64 = 0; [L42] const SORT_2 var_74 = 0; [L43] const SORT_2 var_76 = 1; [L44] const SORT_3 var_91 = 0; [L45] const SORT_4 var_227 = 3; [L46] const SORT_2 var_239 = 3; [L47] const SORT_4 var_241 = 6; [L48] const SORT_4 var_343 = 2; [L50] SORT_1 input_73; [L51] SORT_1 input_75; [L52] SORT_1 input_80; [L53] SORT_1 input_81; [L54] SORT_1 input_85; [L55] SORT_1 input_86; [L56] SORT_1 input_90; [L57] SORT_1 input_98; [L58] SORT_1 input_105; [L59] SORT_1 input_112; [L60] SORT_1 input_116; [L61] SORT_1 input_117; [L62] SORT_1 input_131; [L63] SORT_1 input_135; [L64] SORT_1 input_136; [L65] SORT_1 input_150; [L66] SORT_1 input_154; [L67] SORT_1 input_155; [L68] SORT_1 input_176; [L69] SORT_1 input_179; [L70] SORT_1 input_195; [L71] SORT_1 input_198; [L72] SORT_1 input_214; [L73] SORT_1 input_217; [L75] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L75] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L76] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L76] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L77] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L77] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L78] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L78] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L79] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L79] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L80] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L80] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L81] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L81] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L82] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L82] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L83] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L83] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L84] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L84] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L85] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L85] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L86] EXPR __VERIFIER_nondet_uchar() & mask_SORT_2 [L86] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L87] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L87] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L88] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L88] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L89] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L89] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L90] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L91] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L91] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L92] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L92] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L93] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L93] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L94] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L95] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L96] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L97] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L98] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L99] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L100] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L100] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L101] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L102] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_2 init_7_arg_1 = var_5; [L105] state_6 = init_7_arg_1 [L106] SORT_2 init_9_arg_1 = var_5; [L107] state_8 = init_9_arg_1 [L108] SORT_2 init_11_arg_1 = var_5; [L109] state_10 = init_11_arg_1 [L110] SORT_2 init_13_arg_1 = var_5; [L111] state_12 = init_13_arg_1 [L112] SORT_2 init_15_arg_1 = var_5; [L113] state_14 = init_15_arg_1 [L114] SORT_2 init_17_arg_1 = var_5; [L115] state_16 = init_17_arg_1 [L116] SORT_2 init_19_arg_1 = var_5; [L117] state_18 = init_19_arg_1 [L118] SORT_2 init_21_arg_1 = var_5; [L119] state_20 = init_21_arg_1 [L120] SORT_2 init_23_arg_1 = var_5; [L121] state_22 = init_23_arg_1 [L122] SORT_2 init_25_arg_1 = var_5; [L123] state_24 = init_25_arg_1 [L124] SORT_2 init_27_arg_1 = var_5; [L125] state_26 = init_27_arg_1 [L126] SORT_2 init_29_arg_1 = var_5; [L127] state_28 = init_29_arg_1 [L128] SORT_1 init_32_arg_1 = var_30; [L129] state_31 = init_32_arg_1 [L130] SORT_1 init_34_arg_1 = var_30; [L131] state_33 = init_34_arg_1 [L132] SORT_1 init_36_arg_1 = var_30; [L133] state_35 = init_36_arg_1 [L134] SORT_1 init_38_arg_1 = var_30; [L135] state_37 = init_38_arg_1 [L136] SORT_1 init_40_arg_1 = var_30; [L137] state_39 = init_40_arg_1 [L138] SORT_1 init_42_arg_1 = var_30; [L139] state_41 = init_42_arg_1 [L140] SORT_1 init_44_arg_1 = var_30; [L141] state_43 = init_44_arg_1 [L142] SORT_1 init_46_arg_1 = var_30; [L143] state_45 = init_46_arg_1 [L144] SORT_1 init_48_arg_1 = var_30; [L145] state_47 = init_48_arg_1 [L146] SORT_1 init_50_arg_1 = var_30; [L147] state_49 = init_50_arg_1 [L148] SORT_1 init_52_arg_1 = var_30; [L149] state_51 = init_52_arg_1 [L150] SORT_1 init_54_arg_1 = var_30; [L151] state_53 = init_54_arg_1 [L152] SORT_1 init_56_arg_1 = var_30; [L153] state_55 = init_56_arg_1 [L154] SORT_1 init_58_arg_1 = var_30; [L155] state_57 = init_58_arg_1 [L156] SORT_1 init_60_arg_1 = var_30; [L157] state_59 = init_60_arg_1 [L158] SORT_1 init_62_arg_1 = var_30; [L159] state_61 = init_62_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=16777215, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_61=0, state_6=0, state_8=0, var_227=3, var_239=3, var_241=6, var_30=0, var_343=2, var_5=0, var_63=1, var_64=0, var_74=0, var_76=1, var_91=0] [L162] input_73 = __VERIFIER_nondet_uchar() [L163] EXPR input_73 & mask_SORT_1 [L163] input_73 = input_73 & mask_SORT_1 [L164] input_75 = __VERIFIER_nondet_uchar() [L165] EXPR input_75 & mask_SORT_1 [L165] input_75 = input_75 & mask_SORT_1 [L166] input_80 = __VERIFIER_nondet_uchar() [L167] EXPR input_80 & mask_SORT_1 [L167] input_80 = input_80 & mask_SORT_1 [L168] input_81 = __VERIFIER_nondet_uchar() [L169] EXPR input_81 & mask_SORT_1 [L169] input_81 = input_81 & mask_SORT_1 [L170] input_85 = __VERIFIER_nondet_uchar() [L171] EXPR input_85 & mask_SORT_1 [L171] input_85 = input_85 & mask_SORT_1 [L172] input_86 = __VERIFIER_nondet_uchar() [L173] EXPR input_86 & mask_SORT_1 [L173] input_86 = input_86 & mask_SORT_1 [L174] input_90 = __VERIFIER_nondet_uchar() [L175] EXPR input_90 & mask_SORT_1 [L175] input_90 = input_90 & mask_SORT_1 [L176] input_98 = __VERIFIER_nondet_uchar() [L177] EXPR input_98 & mask_SORT_1 [L177] input_98 = input_98 & mask_SORT_1 [L178] input_105 = __VERIFIER_nondet_uchar() [L179] EXPR input_105 & mask_SORT_1 [L179] input_105 = input_105 & mask_SORT_1 [L180] input_112 = __VERIFIER_nondet_uchar() [L181] EXPR input_112 & mask_SORT_1 [L181] input_112 = input_112 & mask_SORT_1 [L182] input_116 = __VERIFIER_nondet_uchar() [L183] EXPR input_116 & mask_SORT_1 [L183] input_116 = input_116 & mask_SORT_1 [L184] input_117 = __VERIFIER_nondet_uchar() [L185] EXPR input_117 & mask_SORT_1 [L185] input_117 = input_117 & mask_SORT_1 [L186] input_131 = __VERIFIER_nondet_uchar() [L187] EXPR input_131 & mask_SORT_1 [L187] input_131 = input_131 & mask_SORT_1 [L188] input_135 = __VERIFIER_nondet_uchar() [L189] EXPR input_135 & mask_SORT_1 [L189] input_135 = input_135 & mask_SORT_1 [L190] input_136 = __VERIFIER_nondet_uchar() [L191] EXPR input_136 & mask_SORT_1 [L191] input_136 = input_136 & mask_SORT_1 [L192] input_150 = __VERIFIER_nondet_uchar() [L193] EXPR input_150 & mask_SORT_1 [L193] input_150 = input_150 & mask_SORT_1 [L194] input_154 = __VERIFIER_nondet_uchar() [L195] EXPR input_154 & mask_SORT_1 [L195] input_154 = input_154 & mask_SORT_1 [L196] input_155 = __VERIFIER_nondet_uchar() [L197] EXPR input_155 & mask_SORT_1 [L197] input_155 = input_155 & mask_SORT_1 [L198] input_176 = __VERIFIER_nondet_uchar() [L199] input_179 = __VERIFIER_nondet_uchar() [L200] input_195 = __VERIFIER_nondet_uchar() [L201] input_198 = __VERIFIER_nondet_uchar() [L202] input_214 = __VERIFIER_nondet_uchar() [L203] input_217 = __VERIFIER_nondet_uchar() [L206] SORT_1 var_65_arg_0 = state_39; [L207] SORT_4 var_65_arg_1 = var_63; [L208] SORT_4 var_65_arg_2 = var_64; [L209] SORT_4 var_65 = var_65_arg_0 ? var_65_arg_1 : var_65_arg_2; [L210] SORT_1 var_66_arg_0 = state_49; [L211] SORT_4 var_66_arg_1 = var_63; [L212] SORT_4 var_66_arg_2 = var_64; [L213] SORT_4 var_66 = var_66_arg_0 ? var_66_arg_1 : var_66_arg_2; [L214] SORT_4 var_67_arg_0 = var_65; [L215] SORT_4 var_67_arg_1 = var_66; [L216] SORT_4 var_67 = var_67_arg_0 + var_67_arg_1; [L217] SORT_1 var_68_arg_0 = state_59; [L218] SORT_4 var_68_arg_1 = var_63; [L219] SORT_4 var_68_arg_2 = var_64; [L220] SORT_4 var_68 = var_68_arg_0 ? var_68_arg_1 : var_68_arg_2; [L221] SORT_4 var_69_arg_0 = var_67; [L222] SORT_4 var_69_arg_1 = var_68; [L223] SORT_4 var_69 = var_69_arg_0 + var_69_arg_1; [L224] EXPR var_69 & mask_SORT_4 [L224] var_69 = var_69 & mask_SORT_4 [L225] SORT_4 var_70_arg_0 = var_69; [L226] SORT_4 var_70_arg_1 = var_63; [L227] SORT_1 var_70 = var_70_arg_0 <= var_70_arg_1; [L228] SORT_1 var_71_arg_0 = ~state_61; [L229] EXPR var_71_arg_0 & mask_SORT_1 [L229] var_71_arg_0 = var_71_arg_0 & mask_SORT_1 [L230] SORT_1 var_71_arg_1 = ~var_70; [L231] EXPR var_71_arg_1 & mask_SORT_1 [L231] var_71_arg_1 = var_71_arg_1 & mask_SORT_1 [L232] EXPR var_71_arg_0 & var_71_arg_1 [L232] SORT_1 var_71 = var_71_arg_0 & var_71_arg_1; [L233] EXPR var_71 & mask_SORT_1 [L233] var_71 = var_71 & mask_SORT_1 [L234] SORT_1 bad_72_arg_0 = var_71; [L235] CALL __VERIFIER_assert(!(bad_72_arg_0)) [L21] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L21] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-23 21:12:48,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8f99c9b906e0ce9dfb5a1fdac7e796a2c68c541e986f60427db8a196999b6c01 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:51,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:51,861 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2023-11-23 21:12:51,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:51,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:51,915 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:51,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:51,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:51,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:51,923 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:51,923 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:51,924 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:51,924 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:51,926 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:51,926 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:51,926 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:51,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:51,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:12:51,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:51,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:12:51,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:51,929 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:12:51,929 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:12:51,930 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:12:51,930 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:12:51,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:12:51,931 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:51,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:51,932 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:12:51,932 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:51,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:51,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:51,935 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:51,935 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:51,935 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:12:51,936 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:12:51,936 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:12:51,936 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:51,936 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:12:51,938 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:51,938 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:51,938 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f99c9b906e0ce9dfb5a1fdac7e796a2c68c541e986f60427db8a196999b6c01 [2023-11-23 21:12:52,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:52,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:52,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:52,405 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:52,405 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:52,407 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c [2023-11-23 21:12:55,660 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:56,176 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:56,177 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c [2023-11-23 21:12:56,196 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/data/af83f455c/a18ae5265d0b4e009073f67257eba469/FLAG0ffad52b8 [2023-11-23 21:12:56,215 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/data/af83f455c/a18ae5265d0b4e009073f67257eba469 [2023-11-23 21:12:56,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:56,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:56,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:56,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:56,228 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:56,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:56" (1/1) ... [2023-11-23 21:12:56,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2805770b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:56, skipping insertion in model container [2023-11-23 21:12:56,231 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:56" (1/1) ... [2023-11-23 21:12:56,346 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:56,630 WARN L240 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_e95e5d67-a604-404a-bd64-1c1fbeee2474/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c[1173,1186] [2023-11-23 21:12:57,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:57,178 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:57,193 WARN L240 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_e95e5d67-a604-404a-bd64-1c1fbeee2474/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c[1173,1186] [2023-11-23 21:12:57,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:57,367 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:57,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57 WrapperNode [2023-11-23 21:12:57,368 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:57,369 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:57,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:57,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:57,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,603 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1652 [2023-11-23 21:12:57,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:57,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:57,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:57,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:57,616 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,631 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,631 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,698 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,704 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:57,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:57,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:57,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:57,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (1/1) ... [2023-11-23 21:12:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:57,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:57,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:12:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:57,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:58,281 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:58,285 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:13:01,703 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:01,828 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:01,828 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:13:01,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:01 BoogieIcfgContainer [2023-11-23 21:13:01,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:01,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:01,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:01,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:01,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:56" (1/3) ... [2023-11-23 21:13:01,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aca0746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:01, skipping insertion in model container [2023-11-23 21:13:01,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:57" (2/3) ... [2023-11-23 21:13:01,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aca0746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:01, skipping insertion in model container [2023-11-23 21:13:01,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:01" (3/3) ... [2023-11-23 21:13:01,841 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.4.prop1-func-interl.c [2023-11-23 21:13:01,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:01,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:13:01,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:01,935 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@2f7eb5b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:01,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:13:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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) [2023-11-23 21:13:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:13:01,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:01,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:13:01,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:01,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1827279, now seen corresponding path program 1 times [2023-11-23 21:13:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:13:01,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622498967] [2023-11-23 21:13:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:01,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:13:01,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:13:01,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:13:02,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-23 21:13:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:02,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 21:13:02,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:03,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:03,106 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:13:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622498967] [2023-11-23 21:13:03,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622498967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:03,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:03,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50774630] [2023-11-23 21:13:03,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:03,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:13:03,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:03,154 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-23 21:13:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:03,554 INFO L93 Difference]: Finished difference Result 16 states and 24 transitions. [2023-11-23 21:13:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2023-11-23 21:13:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:03,566 INFO L225 Difference]: With dead ends: 16 [2023-11-23 21:13:03,567 INFO L226 Difference]: Without dead ends: 9 [2023-11-23 21:13:03,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:13:03,575 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:03,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:13:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-23 21:13:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-11-23 21:13:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2023-11-23 21:13:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-11-23 21:13:03,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-11-23 21:13:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:03,613 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-11-23 21:13:03,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-23 21:13:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-11-23 21:13:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:13:03,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:03,615 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-23 21:13:03,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:03,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:13:03,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:03,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1393329571, now seen corresponding path program 1 times [2023-11-23 21:13:03,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:13:03,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354668475] [2023-11-23 21:13:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:03,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:13:03,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:13:03,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:13:03,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95e5d67-a604-404a-bd64-1c1fbeee2474/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-23 21:13:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:05,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-23 21:13:05,817 INFO L285 TraceCheckSpWp]: Computing forward predicates...