./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem09_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/config/KojakReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem09_label40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4b56e21e5e33d57606852dd5c99ecb209e9740d7770ded6c6e70dc2318ccc7e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 15:40:49,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 15:40:49,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 15:40:49,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 15:40:49,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 15:40:49,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 15:40:49,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 15:40:49,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 15:40:49,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 15:40:49,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 15:40:49,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 15:40:49,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 15:40:49,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 15:40:49,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 15:40:49,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 15:40:49,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 15:40:49,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 15:40:49,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 15:40:49,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 15:40:49,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 15:40:49,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 15:40:49,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 15:40:49,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 15:40:49,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 15:40:49,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 15:40:49,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 15:40:49,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 15:40:49,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 15:40:49,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 15:40:49,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 15:40:49,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 15:40:49,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 15:40:49,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 15:40:49,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 15:40:49,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 15:40:49,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 15:40:49,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 15:40:49,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 15:40:49,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 15:40:49,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 15:40:49,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 15:40:49,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/config/svcomp-Reach-32bit-Kojak_Default.epf [2021-11-23 15:40:49,694 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 15:40:49,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 15:40:49,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 15:40:49,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2021-11-23 15:40:49,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 15:40:49,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 15:40:49,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 15:40:49,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 15:40:49,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 15:40:49,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 15:40:49,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 15:40:49,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 15:40:49,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 15:40:49,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 15:40:49,705 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 15:40:49,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 15:40:49,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 15:40:49,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 15:40:49,706 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2021-11-23 15:40:49,707 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2021-11-23 15:40:49,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 15:40:49,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-11-23 15:40:49,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 15:40:49,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 15:40:49,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 15:40:49,714 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2021-11-23 15:40:49,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 15:40:49,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 15:40:49,714 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_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4b56e21e5e33d57606852dd5c99ecb209e9740d7770ded6c6e70dc2318ccc7e [2021-11-23 15:40:49,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 15:40:49,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 15:40:49,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 15:40:49,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 15:40:49,995 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 15:40:49,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/../../sv-benchmarks/c/eca-rers2012/Problem09_label40.c [2021-11-23 15:40:50,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/data/48c3eef19/9f2f05c151714523a41402cc98d6ab92/FLAG9031a4573 [2021-11-23 15:40:53,928 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 15:40:53,929 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/sv-benchmarks/c/eca-rers2012/Problem09_label40.c [2021-11-23 15:40:54,232 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/data/48c3eef19/9f2f05c151714523a41402cc98d6ab92/FLAG9031a4573 [2021-11-23 15:40:54,433 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/data/48c3eef19/9f2f05c151714523a41402cc98d6ab92 [2021-11-23 15:40:54,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 15:40:54,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 15:40:54,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 15:40:54,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 15:40:54,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 15:40:54,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:54" (1/1) ... [2021-11-23 15:40:54,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32faa9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:54, skipping insertion in model container [2021-11-23 15:40:54,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:54" (1/1) ... [2021-11-23 15:40:54,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 15:40:56,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 15:41:23,541 WARN L230 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_67209351-9c03-42bb-923d-1178c542544c/sv-benchmarks/c/eca-rers2012/Problem09_label40.c[6305813,6305826] [2021-11-23 15:41:23,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 15:41:23,677 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 15:41:38,704 WARN L230 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_67209351-9c03-42bb-923d-1178c542544c/sv-benchmarks/c/eca-rers2012/Problem09_label40.c[6305813,6305826] [2021-11-23 15:41:38,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 15:41:43,334 INFO L208 MainTranslator]: Completed translation [2021-11-23 15:41:43,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43 WrapperNode [2021-11-23 15:41:43,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 15:41:43,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 15:41:43,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 15:41:43,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 15:41:43,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:45,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:51,228 INFO L137 Inliner]: procedures = 88, calls = 82, calls flagged for inlining = 77, calls inlined = 77, statements flattened = 197818 [2021-11-23 15:41:51,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 15:41:51,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 15:41:51,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 15:41:51,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 15:41:51,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:51,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:51,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:51,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:54,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:55,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:55,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:56,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 15:41:56,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 15:41:56,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 15:41:56,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 15:41:56,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:43" (1/1) ... [2021-11-23 15:41:56,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-11-23 15:41:56,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/z3 [2021-11-23 15:41:56,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2021-11-23 15:41:56,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67209351-9c03-42bb-923d-1178c542544c/bin/ukojak-CwSLpZB5Qu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2021-11-23 15:41:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 15:41:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 15:41:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 15:41:56,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 15:41:56,759 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 15:41:56,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation