./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test26-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test26-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7 --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 32bit --witnessprinter.graph.data.programhash c5617f713954d7209d6b7210dc855bccb3ec884121999fe1b009aa3de39a1bff --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:21:57,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:21:57,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:21:57,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:21:57,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:21:57,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:21:57,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:21:57,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:21:57,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:21:57,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:21:57,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:21:57,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:21:57,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:21:57,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:21:57,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:21:57,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:21:57,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:21:57,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:21:57,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:21:57,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:21:57,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:21:57,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:21:57,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:21:57,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:21:57,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:21:57,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:21:57,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:21:57,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:21:57,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:21:57,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:21:57,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:21:57,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:21:57,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:21:57,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:21:57,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:21:57,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:21:57,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:21:57,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:21:57,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:21:57,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:21:57,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:21:57,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:21:57,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:21:57,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:21:57,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:21:57,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:21:57,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:21:57,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:21:57,309 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:21:57,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:21:57,310 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:21:57,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:21:57,311 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:21:57,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:21:57,312 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:21:57,312 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:21:57,312 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:21:57,312 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:21:57,313 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:21:57,313 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:21:57,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:21:57,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:21:57,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:21:57,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:21:57,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:21:57,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:21:57,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:21:57,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:21:57,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:21:57,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:21:57,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:21:57,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:21:57,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:21:57,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:21:57,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:21:57,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:21:57,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:21:57,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:21:57,319 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:21:57,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:21:57,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:21:57,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:21:57,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:21:57,320 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5617f713954d7209d6b7210dc855bccb3ec884121999fe1b009aa3de39a1bff [2021-11-25 18:21:57,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:21:57,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:21:57,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:21:57,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:21:57,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:21:57,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-regression/test26-2.c [2021-11-25 18:21:57,767 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/data/d39922da3/e582e6be6fae40f48cc8811f60a15b44/FLAG31476b05f [2021-11-25 18:21:58,313 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:21:58,314 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/sv-benchmarks/c/ldv-regression/test26-2.c [2021-11-25 18:21:58,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/data/d39922da3/e582e6be6fae40f48cc8811f60a15b44/FLAG31476b05f [2021-11-25 18:21:58,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/data/d39922da3/e582e6be6fae40f48cc8811f60a15b44 [2021-11-25 18:21:58,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:21:58,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:21:58,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:21:58,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:21:58,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:21:58,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:58,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e434e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58, skipping insertion in model container [2021-11-25 18:21:58,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:58,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:21:58,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:21:58,941 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_afcd2eef-0beb-460a-bf92-2a05e42a26f2/sv-benchmarks/c/ldv-regression/test26-2.c[493,506] [2021-11-25 18:21:58,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:21:58,956 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:21:58,975 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_afcd2eef-0beb-460a-bf92-2a05e42a26f2/sv-benchmarks/c/ldv-regression/test26-2.c[493,506] [2021-11-25 18:21:58,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:21:58,993 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:21:58,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58 WrapperNode [2021-11-25 18:21:58,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:21:58,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:21:58,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:21:58,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:21:59,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,036 INFO L137 Inliner]: procedures = 12, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2021-11-25 18:21:59,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:21:59,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:21:59,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:21:59,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:21:59,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:21:59,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:21:59,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:21:59,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:21:59,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (1/1) ... [2021-11-25 18:21:59,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:21:59,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:59,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:21:59,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:21:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:21:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:21:59,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:21:59,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:21:59,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:21:59,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:21:59,261 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:21:59,263 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:21:59,424 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:21:59,452 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:21:59,455 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:21:59,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:59 BoogieIcfgContainer [2021-11-25 18:21:59,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:21:59,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:21:59,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:21:59,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:21:59,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:21:58" (1/3) ... [2021-11-25 18:21:59,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d0e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:21:59, skipping insertion in model container [2021-11-25 18:21:59,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:58" (2/3) ... [2021-11-25 18:21:59,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d0e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:21:59, skipping insertion in model container [2021-11-25 18:21:59,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:59" (3/3) ... [2021-11-25 18:21:59,471 INFO L111 eAbstractionObserver]: Analyzing ICFG test26-2.c [2021-11-25 18:21:59,478 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:21:59,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:21:59,562 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:21:59,574 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:21:59,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:21:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-25 18:21:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:21:59,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:59,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:21:59,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:59,626 INFO L85 PathProgramCache]: Analyzing trace with hash 46356, now seen corresponding path program 1 times [2021-11-25 18:21:59,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:21:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912360074] [2021-11-25 18:21:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:59,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:21:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:21:59,795 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:21:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:21:59,878 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:21:59,880 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:21:59,882 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:21:59,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:21:59,890 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 18:21:59,895 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:21:59,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:21:59 BoogieIcfgContainer [2021-11-25 18:21:59,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:21:59,936 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:21:59,936 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:21:59,937 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:21:59,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:59" (3/4) ... [2021-11-25 18:21:59,940 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 18:21:59,998 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:21:59,998 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:22:00,001 INFO L158 Benchmark]: Toolchain (without parser) took 1342.36ms. Allocated memory is still 113.2MB. Free memory was 72.7MB in the beginning and 59.0MB in the end (delta: 13.7MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2021-11-25 18:22:00,004 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 113.2MB. Free memory was 89.0MB in the beginning and 88.9MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:22:00,008 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.08ms. Allocated memory is still 113.2MB. Free memory was 72.5MB in the beginning and 86.6MB in the end (delta: -14.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:22:00,009 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.46ms. Allocated memory is still 113.2MB. Free memory was 86.6MB in the beginning and 85.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:22:00,010 INFO L158 Benchmark]: Boogie Preprocessor took 25.14ms. Allocated memory is still 113.2MB. Free memory was 85.0MB in the beginning and 84.1MB in the end (delta: 895.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:22:00,011 INFO L158 Benchmark]: RCFGBuilder took 395.31ms. Allocated memory is still 113.2MB. Free memory was 84.1MB in the beginning and 74.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:22:00,012 INFO L158 Benchmark]: TraceAbstraction took 471.64ms. Allocated memory is still 113.2MB. Free memory was 74.0MB in the beginning and 60.6MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:22:00,013 INFO L158 Benchmark]: Witness Printer took 62.41ms. Allocated memory is still 113.2MB. Free memory was 60.6MB in the beginning and 59.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:22:00,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 113.2MB. Free memory was 89.0MB in the beginning and 88.9MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 334.08ms. Allocated memory is still 113.2MB. Free memory was 72.5MB in the beginning and 86.6MB in the end (delta: -14.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.46ms. Allocated memory is still 113.2MB. Free memory was 86.6MB in the beginning and 85.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.14ms. Allocated memory is still 113.2MB. Free memory was 85.0MB in the beginning and 84.1MB in the end (delta: 895.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 395.31ms. Allocated memory is still 113.2MB. Free memory was 84.1MB in the beginning and 74.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 471.64ms. Allocated memory is still 113.2MB. Free memory was 74.0MB in the beginning and 60.6MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 62.41ms. Allocated memory is still 113.2MB. Free memory was 60.6MB in the beginning and 59.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 26]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L5-L7] struct dummy { int a, b; } global = {0, 1}; [L16] struct dummy *pd = &global; [L18] CALL assign(&pd->b, &pd->b) [L11] EXPR \read(*pb) [L11] *pa = *pb [L18] RET assign(&pd->b, &pd->b) [L20] EXPR pd->a [L20] EXPR global.b VAL [global={4:0}, global.b=1, pd={4:0}, pd->a=0] [L20] COND TRUE pd->a != global.b [L26] reach_error() VAL [global={4:0}, pd={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 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 proved your program to be incorrect! [2021-11-25 18:22:00,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcd2eef-0beb-460a-bf92-2a05e42a26f2/bin/utaipan-eEHZpOm5b7/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE