./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal62.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/config/KojakReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal62.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/config/svcomp-Reach-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4 --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 64bit --witnessprinter.graph.data.programhash 0fe372a5eb8400bcc345545416843b9b825ce3140d26b59c558240bda88cc2a7 --- 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-2329fc7 [2022-12-14 18:03:02,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 18:03:02,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 18:03:02,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 18:03:02,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 18:03:02,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 18:03:02,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 18:03:02,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 18:03:02,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 18:03:02,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 18:03:02,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 18:03:02,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 18:03:02,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 18:03:02,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 18:03:02,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 18:03:02,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 18:03:02,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 18:03:02,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 18:03:02,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 18:03:02,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 18:03:02,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 18:03:02,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 18:03:02,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 18:03:02,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 18:03:02,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 18:03:02,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 18:03:02,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 18:03:02,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 18:03:02,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 18:03:02,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 18:03:02,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 18:03:02,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 18:03:02,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 18:03:02,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 18:03:02,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 18:03:02,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 18:03:02,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 18:03:02,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 18:03:02,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 18:03:02,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 18:03:02,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 18:03:02,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/config/svcomp-Reach-64bit-Kojak_Default.epf [2022-12-14 18:03:02,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 18:03:02,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 18:03:02,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 18:03:02,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2022-12-14 18:03:02,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 18:03:02,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 18:03:02,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 18:03:02,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 18:03:02,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 18:03:02,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 18:03:02,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 18:03:02,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 18:03:02,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 18:03:02,947 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 18:03:02,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 18:03:02,948 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2022-12-14 18:03:02,948 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2022-12-14 18:03:02,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 18:03:02,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2022-12-14 18:03:02,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 18:03:02,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 18:03:02,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 18:03:02,948 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2022-12-14 18:03:02,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 18:03:02,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 18:03:02,949 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_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0fe372a5eb8400bcc345545416843b9b825ce3140d26b59c558240bda88cc2a7 [2022-12-14 18:03:03,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 18:03:03,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 18:03:03,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 18:03:03,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 18:03:03,130 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 18:03:03,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal62.c [2022-12-14 18:03:05,630 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 18:03:05,992 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 18:03:05,992 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal62.c [2022-12-14 18:03:06,017 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/data/9001181a5/06efff6f5cff40179b1f3edd825bd27e/FLAG7e1e25147 [2022-12-14 18:03:06,197 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/data/9001181a5/06efff6f5cff40179b1f3edd825bd27e [2022-12-14 18:03:06,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 18:03:06,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 18:03:06,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 18:03:06,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 18:03:06,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 18:03:06,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:03:06" (1/1) ... [2022-12-14 18:03:06,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f28a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:06, skipping insertion in model container [2022-12-14 18:03:06,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:03:06" (1/1) ... [2022-12-14 18:03:06,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 18:03:06,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 18:03:06,512 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_2acb34eb-92fe-4a31-96f8-659b69f3530a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal62.c[1107,1120] [2022-12-14 18:03:07,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 18:03:07,157 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 18:03:07,165 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_2acb34eb-92fe-4a31-96f8-659b69f3530a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal62.c[1107,1120] [2022-12-14 18:03:07,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 18:03:07,714 INFO L208 MainTranslator]: Completed translation [2022-12-14 18:03:07,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07 WrapperNode [2022-12-14 18:03:07,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 18:03:07,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 18:03:07,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 18:03:07,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 18:03:07,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:07,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,297 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 11684 [2022-12-14 18:03:08,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 18:03:08,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 18:03:08,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 18:03:08,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 18:03:08,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,573 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 18:03:08,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 18:03:08,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 18:03:08,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 18:03:08,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:07" (1/1) ... [2022-12-14 18:03:08,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2022-12-14 18:03:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/z3 [2022-12-14 18:03:08,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2022-12-14 18:03:08,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2acb34eb-92fe-4a31-96f8-659b69f3530a/bin/ukojak-rkRKPMF4O4/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2022-12-14 18:03:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 18:03:08,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 18:03:09,587 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 18:03:09,589 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation