./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d70ec4f924a7b66c3c5b4c9f4ff09d3682a4c192bf1d70fa04fe14236f51f678 --- 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-dbf71c6-m [2022-10-17 11:01:48,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:01:48,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:01:48,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:01:48,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:01:48,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:01:48,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:01:48,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:01:48,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:01:48,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:01:48,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:01:48,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:01:48,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:01:48,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:01:48,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:01:48,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:01:48,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:01:48,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:01:48,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:01:48,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:01:48,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:01:48,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:01:48,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:01:48,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:01:48,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:01:48,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:01:48,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:01:48,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:01:48,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:01:48,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:01:48,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:01:48,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:01:48,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:01:48,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:01:48,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:01:48,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:01:48,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:01:48,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:01:48,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:01:48,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:01:48,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:01:48,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:01:48,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:01:48,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:01:48,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:01:48,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:01:48,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:01:48,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:01:48,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:01:48,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:01:48,334 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:01:48,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:01:48,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:01:48,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:01:48,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:01:48,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:01:48,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:01:48,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:01:48,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:01:48,337 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:01:48,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:01:48,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:01:48,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:01:48,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:01:48,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:01:48,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:01:48,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:48,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:01:48,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:01:48,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:01:48,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:01:48,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:01:48,342 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:01:48,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:01:48,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:01:48,343 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_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d70ec4f924a7b66c3c5b4c9f4ff09d3682a4c192bf1d70fa04fe14236f51f678 [2022-10-17 11:01:48,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:01:48,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:01:48,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:01:48,667 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:01:48,668 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:01:48,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/ldv-regression/test20.c [2022-10-17 11:01:48,762 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/data/60c5d42df/5ba3069305c54ba2bf9d0588f157ffaf/FLAGcbcd94b10 [2022-10-17 11:01:49,218 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:01:49,218 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/sv-benchmarks/c/ldv-regression/test20.c [2022-10-17 11:01:49,224 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/data/60c5d42df/5ba3069305c54ba2bf9d0588f157ffaf/FLAGcbcd94b10 [2022-10-17 11:01:49,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/data/60c5d42df/5ba3069305c54ba2bf9d0588f157ffaf [2022-10-17 11:01:49,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:01:49,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:01:49,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:49,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:01:49,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:01:49,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606f6eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49, skipping insertion in model container [2022-10-17 11:01:49,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:01:49,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:01:49,842 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_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/sv-benchmarks/c/ldv-regression/test20.c[377,390] [2022-10-17 11:01:49,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:49,867 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:01:49,881 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_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/sv-benchmarks/c/ldv-regression/test20.c[377,390] [2022-10-17 11:01:49,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:49,902 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:01:49,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49 WrapperNode [2022-10-17 11:01:49,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:49,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:49,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:01:49,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:01:49,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,946 INFO L138 Inliner]: procedures = 12, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2022-10-17 11:01:49,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:49,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:01:49,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:01:49,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:01:49,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,971 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:01:49,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:01:49,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:01:49,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:01:49,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (1/1) ... [2022-10-17 11:01:49,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:50,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:01:50,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:01:50,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:01:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:01:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:01:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:01:50,119 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:01:50,121 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:01:50,220 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:01:50,226 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:01:50,226 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 11:01:50,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:50 BoogieIcfgContainer [2022-10-17 11:01:50,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:01:50,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:01:50,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:01:50,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:01:50,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:01:49" (1/3) ... [2022-10-17 11:01:50,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bf55a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:50, skipping insertion in model container [2022-10-17 11:01:50,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:49" (2/3) ... [2022-10-17 11:01:50,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bf55a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:50, skipping insertion in model container [2022-10-17 11:01:50,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:50" (3/3) ... [2022-10-17 11:01:50,238 INFO L112 eAbstractionObserver]: Analyzing ICFG test20.c [2022-10-17 11:01:50,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:01:50,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:01:50,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:01:50,343 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=PETRI_NET, 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;@3483236a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:01:50,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:01:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.2857142857142858) 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) [2022-10-17 11:01:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-17 11:01:50,357 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:50,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-17 11:01:50,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:50,365 INFO L85 PathProgramCache]: Analyzing trace with hash 925607, now seen corresponding path program 1 times [2022-10-17 11:01:50,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:50,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726261222] [2022-10-17 11:01:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:50,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:50,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:50,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726261222] [2022-10-17 11:01:50,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726261222] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:50,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:50,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:50,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410872403] [2022-10-17 11:01:50,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:50,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:01:50,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:01:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:01:50,761 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.2857142857142858) 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:50,832 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2022-10-17 11:01:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:01:50,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-17 11:01:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:50,867 INFO L225 Difference]: With dead ends: 13 [2022-10-17 11:01:50,867 INFO L226 Difference]: Without dead ends: 0 [2022-10-17 11:01:50,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:01:50,875 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:50,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:01:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-17 11:01:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-17 11:01:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-10-17 11:01:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-17 11:01:50,929 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2022-10-17 11:01:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:50,930 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-17 11:01:50,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-17 11:01:50,954 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-17 11:01:50,957 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 11:01:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:01:50,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-10-17 11:01:50,986 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-10-17 11:01:50,987 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-10-17 11:01:50,987 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-10-17 11:01:50,987 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-10-17 11:01:50,988 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-10-17 11:01:50,988 INFO L895 garLoopResultBuilder]: At program point L20(lines 18 21) the Hoare annotation is: (and (not (= |ULTIMATE.start_equal_~a#1.base| |ULTIMATE.start_equal_~b#1.base|)) (= |~#a~0.base| 4) (not (= |~#b~0.base| 4))) [2022-10-17 11:01:50,989 INFO L895 garLoopResultBuilder]: At program point L13(lines 6 14) the Hoare annotation is: (and (not (= |ULTIMATE.start_equal_~a#1.base| |ULTIMATE.start_equal_~b#1.base|)) (= |~#a~0.base| 4) (not (= |~#b~0.base| 4))) [2022-10-17 11:01:50,989 INFO L895 garLoopResultBuilder]: At program point L8(lines 6 14) the Hoare annotation is: false [2022-10-17 11:01:50,989 INFO L899 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2022-10-17 11:01:50,993 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 11:01:50,997 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 11:01:51,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 11:01:51 BoogieIcfgContainer [2022-10-17 11:01:51,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 11:01:51,017 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 11:01:51,017 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 11:01:51,018 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 11:01:51,018 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:50" (3/4) ... [2022-10-17 11:01:51,022 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-10-17 11:01:51,034 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-10-17 11:01:51,034 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-10-17 11:01:51,034 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-10-17 11:01:51,035 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-10-17 11:01:51,080 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/witness.graphml [2022-10-17 11:01:51,081 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 11:01:51,082 INFO L158 Benchmark]: Toolchain (without parser) took 1459.84ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 67.1MB in the beginning and 99.6MB in the end (delta: -32.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 11:01:51,083 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 102.8MB. Free memory was 75.1MB in the beginning and 75.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 11:01:51,084 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.50ms. Allocated memory is still 102.8MB. Free memory was 66.8MB in the beginning and 77.0MB in the end (delta: -10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 11:01:51,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.73ms. Allocated memory is still 102.8MB. Free memory was 77.0MB in the beginning and 75.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 11:01:51,087 INFO L158 Benchmark]: Boogie Preprocessor took 32.87ms. Allocated memory is still 102.8MB. Free memory was 75.7MB in the beginning and 74.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 11:01:51,088 INFO L158 Benchmark]: RCFGBuilder took 248.04ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 65.8MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 11:01:51,089 INFO L158 Benchmark]: TraceAbstraction took 785.15ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 65.4MB in the beginning and 101.7MB in the end (delta: -36.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 11:01:51,090 INFO L158 Benchmark]: Witness Printer took 63.64ms. Allocated memory is still 130.0MB. Free memory was 101.7MB in the beginning and 99.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 11:01:51,096 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 102.8MB. Free memory was 75.1MB in the beginning and 75.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.50ms. Allocated memory is still 102.8MB. Free memory was 66.8MB in the beginning and 77.0MB in the end (delta: -10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.73ms. Allocated memory is still 102.8MB. Free memory was 77.0MB in the beginning and 75.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.87ms. Allocated memory is still 102.8MB. Free memory was 75.7MB in the beginning and 74.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 248.04ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 65.8MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 785.15ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 65.4MB in the beginning and 101.7MB in the end (delta: -36.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 63.64ms. Allocated memory is still 130.0MB. Free memory was 101.7MB in the beginning and 99.6MB in the end (delta: 2.1MB). 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 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 5 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2 IncrementalHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 4 mSDtfsCounter, 2 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 25 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 13 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: (!(a == b) && a == 4) && !(b == 4) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (!(a == b) && a == 4) && !(b == 4) - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2022-10-17 11:01:51,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a1be3a-1944-4901-aa8e-52c9d7e17f95/bin/uautomizer-J5u9QxTXDZ/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 Result: TRUE