./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --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 7b74b495a5e861e829e40f2b5977babf1bbd6b873265ff46d461edc75bc3a847 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:22:58,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:22:58,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:22:58,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:22:58,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:22:58,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:22:58,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:22:58,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:22:58,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:22:58,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:22:58,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:22:58,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:22:58,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:22:58,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:22:58,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:22:58,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:22:58,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:22:58,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:22:58,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:22:58,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:22:58,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:22:58,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:22:58,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:22:58,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:22:58,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:22:58,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:22:58,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:22:58,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:22:58,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:22:58,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:22:58,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:22:58,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:22:58,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:22:58,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:22:58,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:22:58,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:22:58,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:22:58,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:22:58,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:22:58,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:22:58,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:22:58,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:22:58,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:22:58,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:22:58,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:22:58,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:22:58,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:22:58,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:22:58,775 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:22:58,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:22:58,776 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:22:58,776 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:22:58,777 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:22:58,777 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:22:58,777 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:22:58,778 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:22:58,778 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:22:58,778 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:22:58,778 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:22:58,778 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:22:58,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:22:58,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:22:58,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:22:58,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:22:58,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:22:58,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:22:58,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:22:58,781 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:22:58,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:22:58,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:22:58,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:22:58,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:22:58,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:22:58,783 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:22:58,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:22:58,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:22:58,784 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:22:58,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:22:58,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:22:58,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:22:58,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b74b495a5e861e829e40f2b5977babf1bbd6b873265ff46d461edc75bc3a847 [2022-11-23 14:22:59,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:22:59,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:22:59,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:22:59,110 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:22:59,110 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:22:59,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c [2022-11-23 14:23:02,065 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:23:02,337 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:23:02,337 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c [2022-11-23 14:23:02,348 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/data/c8d25ede2/f1e9bf8183fa4447b873eb9144259700/FLAG5d4473170 [2022-11-23 14:23:02,367 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/data/c8d25ede2/f1e9bf8183fa4447b873eb9144259700 [2022-11-23 14:23:02,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:23:02,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:23:02,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:23:02,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:23:02,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:23:02,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:02" (1/1) ... [2022-11-23 14:23:02,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f5db4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02, skipping insertion in model container [2022-11-23 14:23:02,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:02" (1/1) ... [2022-11-23 14:23:02,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:23:02,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:23:02,620 WARN L237 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_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c[1107,1120] [2022-11-23 14:23:02,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:23:02,916 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:23:02,928 WARN L237 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_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c[1107,1120] [2022-11-23 14:23:03,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:23:03,081 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:23:03,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03 WrapperNode [2022-11-23 14:23:03,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:23:03,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:23:03,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:23:03,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:23:03,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,213 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1274 [2022-11-23 14:23:03,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:23:03,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:23:03,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:23:03,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:23:03,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,270 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:23:03,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:23:03,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:23:03,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:23:03,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (1/1) ... [2022-11-23 14:23:03,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:23:03,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:03,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:23:03,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:23:03,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:23:03,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:23:03,878 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:23:03,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:23:14,254 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:23:14,300 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:23:14,301 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:23:14,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:14 BoogieIcfgContainer [2022-11-23 14:23:14,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:23:14,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:23:14,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:23:14,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:23:14,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:02" (1/3) ... [2022-11-23 14:23:14,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f32215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:14, skipping insertion in model container [2022-11-23 14:23:14,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:03" (2/3) ... [2022-11-23 14:23:14,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f32215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:14, skipping insertion in model container [2022-11-23 14:23:14,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:14" (3/3) ... [2022-11-23 14:23:14,322 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.v_DAIO.c [2022-11-23 14:23:14,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:23:14,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:23:14,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:23:14,414 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=LoopsAndPotentialCycles, 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;@1153596a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:23:14,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:23:14,423 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) [2022-11-23 14:23:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:23:14,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:14,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:23:14,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:14,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1797488, now seen corresponding path program 1 times [2022-11-23 14:23:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056016903] [2022-11-23 14:23:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:23:14,782 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:23:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:23:14,952 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:23:14,955 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:23:14,956 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:23:14,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:23:14,965 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-23 14:23:14,970 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:23:15,022 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-23 14:23:15,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:23:15 BoogieIcfgContainer [2022-11-23 14:23:15,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:23:15,043 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:23:15,043 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:23:15,044 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:23:15,044 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:14" (3/4) ... [2022-11-23 14:23:15,052 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 14:23:15,053 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:23:15,055 INFO L158 Benchmark]: Toolchain (without parser) took 12682.81ms. Allocated memory was 148.9MB in the beginning and 513.8MB in the end (delta: 364.9MB). Free memory was 109.6MB in the beginning and 256.0MB in the end (delta: -146.4MB). Peak memory consumption was 219.1MB. Max. memory is 16.1GB. [2022-11-23 14:23:15,056 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory is still 90.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:23:15,058 INFO L158 Benchmark]: CACSL2BoogieTranslator took 707.00ms. Allocated memory is still 148.9MB. Free memory was 109.6MB in the beginning and 70.4MB in the end (delta: 39.3MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-23 14:23:15,059 INFO L158 Benchmark]: Boogie Procedure Inliner took 130.79ms. Allocated memory is still 148.9MB. Free memory was 70.4MB in the beginning and 60.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:23:15,060 INFO L158 Benchmark]: Boogie Preprocessor took 72.90ms. Allocated memory is still 148.9MB. Free memory was 60.3MB in the beginning and 55.1MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-23 14:23:15,066 INFO L158 Benchmark]: RCFGBuilder took 11017.97ms. Allocated memory was 148.9MB in the beginning and 513.8MB in the end (delta: 364.9MB). Free memory was 54.6MB in the beginning and 295.9MB in the end (delta: -241.3MB). Peak memory consumption was 263.4MB. Max. memory is 16.1GB. [2022-11-23 14:23:15,068 INFO L158 Benchmark]: TraceAbstraction took 733.85ms. Allocated memory is still 513.8MB. Free memory was 294.8MB in the beginning and 257.1MB in the end (delta: 37.8MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-23 14:23:15,069 INFO L158 Benchmark]: Witness Printer took 10.53ms. Allocated memory is still 513.8MB. Free memory was 257.1MB in the beginning and 256.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:23:15,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory is still 90.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 707.00ms. Allocated memory is still 148.9MB. Free memory was 109.6MB in the beginning and 70.4MB in the end (delta: 39.3MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 130.79ms. Allocated memory is still 148.9MB. Free memory was 70.4MB in the beginning and 60.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.90ms. Allocated memory is still 148.9MB. Free memory was 60.3MB in the beginning and 55.1MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 11017.97ms. Allocated memory was 148.9MB in the beginning and 513.8MB in the end (delta: 364.9MB). Free memory was 54.6MB in the beginning and 295.9MB in the end (delta: -241.3MB). Peak memory consumption was 263.4MB. Max. memory is 16.1GB. * TraceAbstraction took 733.85ms. Allocated memory is still 513.8MB. Free memory was 294.8MB in the beginning and 257.1MB in the end (delta: 37.8MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Witness Printer took 10.53ms. Allocated memory is still 513.8MB. Free memory was 257.1MB in the beginning and 256.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 296, overapproximation of bitwiseOr at line 294, overapproximation of bitwiseAnd at line 191. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 4); [L29] const SORT_10 msb_SORT_10 = (SORT_10)1 << (4 - 1); [L31] const SORT_16 mask_SORT_16 = (SORT_16)-1 >> (sizeof(SORT_16) * 8 - 32); [L32] const SORT_16 msb_SORT_16 = (SORT_16)1 << (32 - 1); [L34] const SORT_32 mask_SORT_32 = (SORT_32)-1 >> (sizeof(SORT_32) * 8 - 7); [L35] const SORT_32 msb_SORT_32 = (SORT_32)1 << (7 - 1); [L37] const SORT_40 mask_SORT_40 = (SORT_40)-1 >> (sizeof(SORT_40) * 8 - 9); [L38] const SORT_40 msb_SORT_40 = (SORT_40)1 << (9 - 1); [L40] const SORT_60 mask_SORT_60 = (SORT_60)-1 >> (sizeof(SORT_60) * 8 - 20); [L41] const SORT_60 msb_SORT_60 = (SORT_60)1 << (20 - 1); [L43] const SORT_357 mask_SORT_357 = (SORT_357)-1 >> (sizeof(SORT_357) * 8 - 2); [L44] const SORT_357 msb_SORT_357 = (SORT_357)1 << (2 - 1); [L46] const SORT_359 mask_SORT_359 = (SORT_359)-1 >> (sizeof(SORT_359) * 8 - 3); [L47] const SORT_359 msb_SORT_359 = (SORT_359)1 << (3 - 1); [L49] const SORT_1 var_13 = 0; [L50] const SORT_16 var_18 = 1; [L51] const SORT_16 var_23 = 0; [L52] const SORT_1 var_28 = 1; [L53] const SORT_32 var_33 = 0; [L54] const SORT_40 var_41 = 0; [L55] const SORT_10 var_48 = 0; [L56] const SORT_16 var_67 = 31; [L57] const SORT_16 var_71 = 32; [L58] const SORT_10 var_74 = 3; [L59] const SORT_16 var_90 = 2; [L60] const SORT_10 var_96 = 5; [L61] const SORT_10 var_117 = 7; [L62] const SORT_10 var_136 = 9; [L63] const SORT_32 var_233 = 4; [L64] const SORT_10 var_235 = 2; [L65] const SORT_32 var_254 = 1; [L66] const SORT_16 var_256 = 191; [L67] const SORT_10 var_259 = 6; [L68] const SORT_10 var_282 = 4; [L69] const SORT_10 var_307 = 8; [L70] const SORT_40 var_315 = 1; [L71] const SORT_10 var_321 = 10; [L72] const SORT_10 var_329 = 1; [L74] SORT_1 input_2; [L75] SORT_1 input_3; [L76] SORT_1 input_4; [L77] SORT_1 input_5; [L78] SORT_1 input_6; [L79] SORT_1 input_7; [L80] SORT_1 input_8; [L81] SORT_1 input_9; [L82] SORT_10 input_11; [L83] SORT_10 input_12; [L84] SORT_1 input_38; [L85] SORT_1 input_44; [L86] SORT_1 input_46; [L87] SORT_1 input_52; [L88] SORT_1 input_54; [L89] SORT_1 input_56; [L90] SORT_1 input_58; [L91] SORT_60 input_61; [L92] SORT_1 input_63; [L93] SORT_1 input_64; [L94] SORT_1 input_65; [L95] SORT_1 input_77; [L96] SORT_1 input_82; [L97] SORT_1 input_86; [L98] SORT_1 input_87; [L99] SORT_1 input_88; [L100] SORT_1 input_99; [L101] SORT_1 input_104; [L102] SORT_1 input_108; [L103] SORT_1 input_109; [L104] SORT_1 input_110; [L105] SORT_1 input_120; [L106] SORT_1 input_125; [L107] SORT_1 input_127; [L108] SORT_1 input_128; [L109] SORT_1 input_129; [L110] SORT_1 input_139; [L111] SORT_1 input_144; [L112] SORT_1 input_151; [L113] SORT_1 input_155; [L114] SORT_1 input_156; [L115] SORT_1 input_157; [L116] SORT_1 input_164; [L117] SORT_1 input_169; [L118] SORT_1 input_173; [L119] SORT_1 input_174; [L120] SORT_1 input_175; [L121] SORT_1 input_182; [L122] SORT_1 input_187; [L123] SORT_1 input_191; [L124] SORT_1 input_192; [L125] SORT_1 input_193; [L126] SORT_1 input_200; [L127] SORT_1 input_205; [L128] SORT_1 input_207; [L129] SORT_1 input_208; [L130] SORT_1 input_209; [L131] SORT_1 input_216; [L132] SORT_1 input_221; [L133] SORT_1 input_228; [L134] SORT_32 input_232; [L135] SORT_32 input_238; [L136] SORT_32 input_242; [L137] SORT_32 input_249; [L138] SORT_32 input_253; [L139] SORT_32 input_262; [L140] SORT_32 input_264; [L141] SORT_32 input_271; [L142] SORT_32 input_278; [L143] SORT_32 input_285; [L144] SORT_32 input_292; [L145] SORT_32 input_296; [L146] SORT_32 input_303; [L147] SORT_32 input_311; [L148] SORT_40 input_324; [L149] SORT_10 input_328; [L150] SORT_10 input_334; [L151] SORT_10 input_340; [L152] SORT_10 input_344; [L153] SORT_10 input_346; [L154] SORT_10 input_350; [L155] SORT_10 input_363; [L156] SORT_10 input_367; [L157] SORT_10 input_369; [L158] SORT_10 input_373; [L159] SORT_10 input_377; [L160] SORT_10 input_381; [L161] SORT_10 input_385; [L162] SORT_10 input_389; [L163] SORT_10 input_406; [L165] SORT_1 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L166] SORT_1 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L167] SORT_32 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_32; [L168] SORT_32 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_32; [L169] SORT_40 state_42 = __VERIFIER_nondet_ushort() & mask_SORT_40; [L170] SORT_10 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_10; [L172] SORT_1 init_15_arg_1 = var_13; [L173] state_14 = init_15_arg_1 [L174] SORT_1 init_21_arg_1 = var_13; [L175] state_20 = init_21_arg_1 [L176] SORT_32 init_35_arg_1 = var_33; [L177] state_34 = init_35_arg_1 [L178] SORT_32 init_37_arg_1 = var_33; [L179] state_36 = init_37_arg_1 [L180] SORT_40 init_43_arg_1 = var_41; [L181] state_42 = init_43_arg_1 [L182] SORT_10 init_50_arg_1 = var_48; [L183] state_49 = init_50_arg_1 VAL [init_15_arg_1=0, init_21_arg_1=0, init_35_arg_1=0, init_37_arg_1=0, init_43_arg_1=0, init_50_arg_1=0, mask_SORT_1=1, mask_SORT_10=15, mask_SORT_16=4294967295, mask_SORT_32=127, mask_SORT_357=3, mask_SORT_359=7, mask_SORT_40=511, mask_SORT_60=4294967295, msb_SORT_1=1, msb_SORT_10=8, msb_SORT_16=2147483648, msb_SORT_32=64, msb_SORT_357=2, msb_SORT_359=4, msb_SORT_40=256, msb_SORT_60=524288, state_14=0, state_20=0, state_34=0, state_36=0, state_42=0, state_49=0, var_117=7, var_13=0, var_136=9, var_18=1, var_23=0, var_233=4, var_235=2, var_254=1, var_256=191, var_259=6, var_28=1, var_282=4, var_307=8, var_315=1, var_321=10, var_329=1, var_33=0, var_41=0, var_48=0, var_67=31, var_71=32, var_74=3, var_90=2, var_96=5] [L186] input_2 = __VERIFIER_nondet_uchar() [L187] input_3 = __VERIFIER_nondet_uchar() [L188] input_4 = __VERIFIER_nondet_uchar() [L189] input_5 = __VERIFIER_nondet_uchar() [L190] input_6 = __VERIFIER_nondet_uchar() [L191] input_6 = input_6 & mask_SORT_1 [L192] input_7 = __VERIFIER_nondet_uchar() [L193] input_8 = __VERIFIER_nondet_uchar() [L194] input_9 = __VERIFIER_nondet_uchar() [L195] input_9 = input_9 & mask_SORT_1 [L196] input_11 = __VERIFIER_nondet_uchar() [L197] input_12 = __VERIFIER_nondet_uchar() [L198] input_38 = __VERIFIER_nondet_uchar() [L199] input_44 = __VERIFIER_nondet_uchar() [L200] input_46 = __VERIFIER_nondet_uchar() [L201] input_52 = __VERIFIER_nondet_uchar() [L202] input_54 = __VERIFIER_nondet_uchar() [L203] input_56 = __VERIFIER_nondet_uchar() [L204] input_58 = __VERIFIER_nondet_uchar() [L205] input_61 = __VERIFIER_nondet_uint() [L206] input_63 = __VERIFIER_nondet_uchar() [L207] input_64 = __VERIFIER_nondet_uchar() [L208] input_65 = __VERIFIER_nondet_uchar() [L209] input_77 = __VERIFIER_nondet_uchar() [L210] input_82 = __VERIFIER_nondet_uchar() [L211] input_86 = __VERIFIER_nondet_uchar() [L212] input_87 = __VERIFIER_nondet_uchar() [L213] input_88 = __VERIFIER_nondet_uchar() [L214] input_99 = __VERIFIER_nondet_uchar() [L215] input_104 = __VERIFIER_nondet_uchar() [L216] input_108 = __VERIFIER_nondet_uchar() [L217] input_109 = __VERIFIER_nondet_uchar() [L218] input_110 = __VERIFIER_nondet_uchar() [L219] input_120 = __VERIFIER_nondet_uchar() [L220] input_125 = __VERIFIER_nondet_uchar() [L221] input_127 = __VERIFIER_nondet_uchar() [L222] input_128 = __VERIFIER_nondet_uchar() [L223] input_129 = __VERIFIER_nondet_uchar() [L224] input_139 = __VERIFIER_nondet_uchar() [L225] input_144 = __VERIFIER_nondet_uchar() [L226] input_151 = __VERIFIER_nondet_uchar() [L227] input_155 = __VERIFIER_nondet_uchar() [L228] input_156 = __VERIFIER_nondet_uchar() [L229] input_157 = __VERIFIER_nondet_uchar() [L230] input_164 = __VERIFIER_nondet_uchar() [L231] input_169 = __VERIFIER_nondet_uchar() [L232] input_173 = __VERIFIER_nondet_uchar() [L233] input_174 = __VERIFIER_nondet_uchar() [L234] input_175 = __VERIFIER_nondet_uchar() [L235] input_182 = __VERIFIER_nondet_uchar() [L236] input_187 = __VERIFIER_nondet_uchar() [L237] input_191 = __VERIFIER_nondet_uchar() [L238] input_192 = __VERIFIER_nondet_uchar() [L239] input_193 = __VERIFIER_nondet_uchar() [L240] input_200 = __VERIFIER_nondet_uchar() [L241] input_205 = __VERIFIER_nondet_uchar() [L242] input_207 = __VERIFIER_nondet_uchar() [L243] input_208 = __VERIFIER_nondet_uchar() [L244] input_209 = __VERIFIER_nondet_uchar() [L245] input_216 = __VERIFIER_nondet_uchar() [L246] input_221 = __VERIFIER_nondet_uchar() [L247] input_228 = __VERIFIER_nondet_uchar() [L248] input_232 = __VERIFIER_nondet_uchar() [L249] input_238 = __VERIFIER_nondet_uchar() [L250] input_242 = __VERIFIER_nondet_uchar() [L251] input_249 = __VERIFIER_nondet_uchar() [L252] input_253 = __VERIFIER_nondet_uchar() [L253] input_262 = __VERIFIER_nondet_uchar() [L254] input_264 = __VERIFIER_nondet_uchar() [L255] input_271 = __VERIFIER_nondet_uchar() [L256] input_278 = __VERIFIER_nondet_uchar() [L257] input_285 = __VERIFIER_nondet_uchar() [L258] input_292 = __VERIFIER_nondet_uchar() [L259] input_296 = __VERIFIER_nondet_uchar() [L260] input_303 = __VERIFIER_nondet_uchar() [L261] input_311 = __VERIFIER_nondet_uchar() [L262] input_324 = __VERIFIER_nondet_ushort() [L263] input_328 = __VERIFIER_nondet_uchar() [L264] input_334 = __VERIFIER_nondet_uchar() [L265] input_340 = __VERIFIER_nondet_uchar() [L266] input_344 = __VERIFIER_nondet_uchar() [L267] input_346 = __VERIFIER_nondet_uchar() [L268] input_350 = __VERIFIER_nondet_uchar() [L269] input_363 = __VERIFIER_nondet_uchar() [L270] input_367 = __VERIFIER_nondet_uchar() [L271] input_369 = __VERIFIER_nondet_uchar() [L272] input_373 = __VERIFIER_nondet_uchar() [L273] input_377 = __VERIFIER_nondet_uchar() [L274] input_381 = __VERIFIER_nondet_uchar() [L275] input_385 = __VERIFIER_nondet_uchar() [L276] input_389 = __VERIFIER_nondet_uchar() [L277] input_406 = __VERIFIER_nondet_uchar() [L280] SORT_1 var_17_arg_0 = state_14; [L281] var_17_arg_0 = var_17_arg_0 & mask_SORT_1 [L282] SORT_16 var_17 = var_17_arg_0; [L283] SORT_16 var_19_arg_0 = var_17; [L284] SORT_16 var_19_arg_1 = var_18; [L285] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L286] SORT_1 var_22_arg_0 = state_20; [L287] var_22_arg_0 = var_22_arg_0 & mask_SORT_1 [L288] SORT_16 var_22 = var_22_arg_0; [L289] SORT_16 var_24_arg_0 = var_22; [L290] SORT_16 var_24_arg_1 = var_23; [L291] SORT_1 var_24 = var_24_arg_0 == var_24_arg_1; [L292] SORT_1 var_25_arg_0 = var_19; [L293] SORT_1 var_25_arg_1 = var_24; [L294] SORT_1 var_25 = var_25_arg_0 | var_25_arg_1; [L295] SORT_1 var_29_arg_0 = var_25; [L296] SORT_1 var_29 = ~var_29_arg_0; [L297] SORT_1 var_30_arg_0 = var_28; [L298] SORT_1 var_30_arg_1 = var_29; [L299] SORT_1 var_30 = var_30_arg_0 & var_30_arg_1; [L300] var_30 = var_30 & mask_SORT_1 [L301] SORT_1 bad_31_arg_0 = var_30; [L302] CALL __VERIFIER_assert(!(bad_31_arg_0)) [L20] COND TRUE !(cond) VAL [cond=0, unknown-#in~cond-unknown=0] [L20] reach_error() VAL [cond=0, unknown-#in~cond-unknown=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, 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, 0.2s 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 [2022-11-23 14:23:15,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --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 7b74b495a5e861e829e40f2b5977babf1bbd6b873265ff46d461edc75bc3a847 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:23:17,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:23:17,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:23:17,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:23:17,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:23:17,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:23:17,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:23:17,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:23:17,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:23:17,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:23:17,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:23:17,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:23:17,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:23:17,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:23:17,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:23:17,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:23:17,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:23:17,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:23:17,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:23:17,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:23:17,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:23:17,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:23:17,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:23:17,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:23:17,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:23:17,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:23:17,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:23:17,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:23:17,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:23:17,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:23:17,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:23:17,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:23:17,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:23:17,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:23:17,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:23:17,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:23:17,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:23:17,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:23:17,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:23:17,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:23:17,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:23:17,769 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-23 14:23:17,792 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:23:17,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:23:17,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:23:17,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:23:17,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:23:17,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:23:17,794 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:23:17,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:23:17,795 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:23:17,795 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:23:17,795 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:23:17,795 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:23:17,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:23:17,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:23:17,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:23:17,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:23:17,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:23:17,797 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:23:17,797 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:23:17,797 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:23:17,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:23:17,798 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:23:17,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:23:17,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:23:17,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:23:17,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:23:17,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:23:17,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:23:17,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:23:17,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:23:17,799 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:23:17,800 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:23:17,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:23:17,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:23:17,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:23:17,800 INFO L138 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_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b74b495a5e861e829e40f2b5977babf1bbd6b873265ff46d461edc75bc3a847 [2022-11-23 14:23:18,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:23:18,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:23:18,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:23:18,180 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:23:18,180 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:23:18,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c [2022-11-23 14:23:21,352 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:23:21,700 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:23:21,701 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c [2022-11-23 14:23:21,719 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/data/0e39c6ea6/7db3d1f08a164035a1711a0863c03663/FLAG6ae1f33d7 [2022-11-23 14:23:21,738 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/data/0e39c6ea6/7db3d1f08a164035a1711a0863c03663 [2022-11-23 14:23:21,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:23:21,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:23:21,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:23:21,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:23:21,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:23:21,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:21" (1/1) ... [2022-11-23 14:23:21,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2644712f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:21, skipping insertion in model container [2022-11-23 14:23:21,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:21" (1/1) ... [2022-11-23 14:23:21,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:23:21,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:23:22,027 WARN L237 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_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c[1107,1120] [2022-11-23 14:23:22,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:23:22,433 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:23:22,446 WARN L237 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_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_DAIO.c[1107,1120] [2022-11-23 14:23:22,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:23:22,563 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:23:22,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22 WrapperNode [2022-11-23 14:23:22,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:23:22,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:23:22,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:23:22,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:23:22,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,714 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1274 [2022-11-23 14:23:22,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:23:22,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:23:22,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:23:22,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:23:22,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,827 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:23:22,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:23:22,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:23:22,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:23:22,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (1/1) ... [2022-11-23 14:23:22,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:23:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:22,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:23:22,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:23:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:23:22,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:23:23,411 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:23:23,416 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:23:25,033 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:23:25,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:23:25,041 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:23:25,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:25 BoogieIcfgContainer [2022-11-23 14:23:25,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:23:25,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:23:25,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:23:25,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:23:25,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:21" (1/3) ... [2022-11-23 14:23:25,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebad17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:25, skipping insertion in model container [2022-11-23 14:23:25,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:22" (2/3) ... [2022-11-23 14:23:25,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebad17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:25, skipping insertion in model container [2022-11-23 14:23:25,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:25" (3/3) ... [2022-11-23 14:23:25,055 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.v_DAIO.c [2022-11-23 14:23:25,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:23:25,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:23:25,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:23:25,158 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=LoopsAndPotentialCycles, 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;@2787aef5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:23:25,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:23:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-11-23 14:23:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:23:25,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:25,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:23:25,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-23 14:23:25,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:23:25,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354688887] [2022-11-23 14:23:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:25,199 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 [2022-11-23 14:23:25,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:23:25,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:23:25,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:23:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:25,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:23:25,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:25,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:23:25,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:23:25,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354688887] [2022-11-23 14:23:25,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354688887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:25,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:25,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:23:25,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912076278] [2022-11-23 14:23:25,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:25,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:23:25,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:23:25,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:23:25,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:23:25,912 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-23 14:23:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:26,239 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-23 14:23:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:23:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-11-23 14:23:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:26,252 INFO L225 Difference]: With dead ends: 20 [2022-11-23 14:23:26,252 INFO L226 Difference]: Without dead ends: 11 [2022-11-23 14:23:26,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:23:26,263 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:26,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:23:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-23 14:23:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-23 14:23:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-11-23 14:23:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-23 14:23:26,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-23 14:23:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:26,312 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-23 14:23:26,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-23 14:23:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-23 14:23:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:23:26,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:26,313 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:26,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:23:26,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:23:26,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-23 14:23:26,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:23:26,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322543809] [2022-11-23 14:23:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:26,535 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 [2022-11-23 14:23:26,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:23:26,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:23:26,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:23:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 14:23:27,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:28,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:34,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:23:34,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322543809] [2022-11-23 14:23:34,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322543809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:34,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609691287] [2022-11-23 14:23:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:34,809 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:23:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:23:34,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:23:34,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-23 14:23:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-23 14:23:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:36,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:38,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609691287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:38,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655671779] [2022-11-23 14:23:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:38,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:38,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:38,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:23:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-23 14:23:39,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:39,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:42,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655671779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:42,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:23:42,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 6, 6] total 13 [2022-11-23 14:23:42,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821879003] [2022-11-23 14:23:42,209 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:23:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:23:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:23:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:23:42,211 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2022-11-23 14:23:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:42,624 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-23 14:23:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:23:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 8 [2022-11-23 14:23:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:42,626 INFO L225 Difference]: With dead ends: 16 [2022-11-23 14:23:42,626 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 14:23:42,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:23:42,628 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:42,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:23:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 14:23:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-23 14:23:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-11-23 14:23:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-23 14:23:42,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-23 14:23:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:42,633 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-23 14:23:42,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2022-11-23 14:23:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-23 14:23:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:23:42,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:42,634 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 14:23:42,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:42,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:43,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:43,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:23:43,243 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-23 14:23:43,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:23:43,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049158120] [2022-11-23 14:23:43,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:23:43,247 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 [2022-11-23 14:23:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:23:43,248 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:23:43,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e481e0c-c31f-4ed1-a4b2-5f6ee49f8633/bin/utaipan-Q6hlc19bkW/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 (6)] Waiting until timeout for monitored process [2022-11-23 14:23:44,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:23:44,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:23:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2134 conjuncts, 197 conjunts are in the unsatisfiable core [2022-11-23 14:23:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:46,792 INFO L328 TraceCheckSpWp]: Computing backward predicates...