./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI --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 fdb95a531f91b891105aa672579f7a5a4ed687cf ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI --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 fdb95a531f91b891105aa672579f7a5a4ed687cf ...................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:33:00,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:33:00,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:33:00,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:33:00,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:33:00,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:33:00,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:33:00,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:33:00,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:33:00,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:33:00,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:33:00,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:33:00,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:33:00,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:33:00,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:33:00,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:33:00,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:33:00,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:33:00,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:33:00,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:33:00,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:33:00,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:33:00,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:33:00,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:33:00,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:33:00,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:33:00,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:33:00,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:33:00,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:33:00,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:33:00,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:33:00,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:33:00,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:33:00,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:33:00,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:33:00,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:33:00,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:33:00,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:33:00,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:33:00,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:33:00,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:33:00,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:33:00,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:33:00,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:33:00,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:33:00,256 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:33:00,256 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:33:00,256 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:33:00,257 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:33:00,257 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:33:00,257 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:33:00,257 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:33:00,258 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:33:00,258 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:33:00,258 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:33:00,258 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:33:00,258 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:33:00,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:33:00,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:33:00,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:33:00,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:33:00,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:33:00,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:33:00,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:33:00,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:33:00,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:33:00,265 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:33:00,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:33:00,266 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:33:00,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:33:00,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:33:00,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:33:00,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:00,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:33:00,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:33:00,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:33:00,269 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:33:00,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:33:00,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:33:00,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:33:00,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:33:00,271 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_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdb95a531f91b891105aa672579f7a5a4ed687cf [2021-10-11 02:33:00,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:33:00,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:33:00,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:33:00,578 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:33:00,581 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:33:00,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2021-10-11 02:33:00,676 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data/1ad486799/dca417822e1f45348d890d3a55957088/FLAGd3d8bbf13 [2021-10-11 02:33:01,155 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:33:01,156 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2021-10-11 02:33:01,164 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data/1ad486799/dca417822e1f45348d890d3a55957088/FLAGd3d8bbf13 [2021-10-11 02:33:01,511 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data/1ad486799/dca417822e1f45348d890d3a55957088 [2021-10-11 02:33:01,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:33:01,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:33:01,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:01,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:33:01,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:33:01,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:01" (1/1) ... [2021-10-11 02:33:01,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58092a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:01, skipping insertion in model container [2021-10-11 02:33:01,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:01" (1/1) ... [2021-10-11 02:33:01,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:33:01,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:01,720 WARN L226 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_a5c1e70b-fd4e-4792-8002-772c8029383f/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2021-10-11 02:33:01,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:01,771 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-10-11 02:33:01,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45ac6f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:01, skipping insertion in model container [2021-10-11 02:33:01,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:01,780 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-11 02:33:01,783 INFO L168 Benchmark]: Toolchain (without parser) took 265.33 ms. Allocated memory is still 123.7 MB. Free memory was 91.5 MB in the beginning and 100.1 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:01,784 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory was 53.1 MB in the beginning and 53.0 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:01,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.35 ms. Allocated memory is still 123.7 MB. Free memory was 91.2 MB in the beginning and 100.1 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:01,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory was 53.1 MB in the beginning and 53.0 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 260.35 ms. Allocated memory is still 123.7 MB. Free memory was 91.2 MB in the beginning and 100.1 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 23]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:33:04,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:33:04,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:33:04,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:33:04,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:33:04,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:33:04,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:33:04,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:33:04,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:33:04,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:33:04,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:33:04,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:33:04,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:33:04,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:33:04,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:33:04,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:33:04,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:33:04,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:33:04,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:33:04,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:33:04,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:33:04,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:33:04,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:33:04,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:33:04,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:33:04,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:33:04,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:33:04,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:33:04,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:33:04,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:33:04,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:33:04,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:33:04,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:33:04,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:33:04,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:33:04,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:33:04,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:33:04,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:33:04,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:33:04,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:33:04,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:33:04,259 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:33:04,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:33:04,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:33:04,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:33:04,315 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:33:04,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:33:04,316 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:33:04,316 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:33:04,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:33:04,317 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:33:04,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:33:04,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:33:04,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:33:04,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:33:04,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:33:04,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:33:04,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:33:04,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:33:04,321 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:33:04,321 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:33:04,322 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:33:04,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:33:04,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:33:04,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:33:04,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:33:04,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:33:04,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:33:04,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:04,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:33:04,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:33:04,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:33:04,325 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:33:04,325 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:33:04,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:33:04,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:33:04,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:33:04,326 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdb95a531f91b891105aa672579f7a5a4ed687cf [2021-10-11 02:33:04,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:33:04,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:33:04,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:33:04,752 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:33:04,753 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:33:04,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2021-10-11 02:33:04,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data/59fb90d24/cc9d1934b80f408b85a62af4a70b80ba/FLAGbbe286aa9 [2021-10-11 02:33:05,300 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:33:05,301 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2021-10-11 02:33:05,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data/59fb90d24/cc9d1934b80f408b85a62af4a70b80ba/FLAGbbe286aa9 [2021-10-11 02:33:05,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/data/59fb90d24/cc9d1934b80f408b85a62af4a70b80ba [2021-10-11 02:33:05,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:33:05,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:33:05,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:05,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:33:05,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:33:05,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:05" (1/1) ... [2021-10-11 02:33:05,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315bea78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:05, skipping insertion in model container [2021-10-11 02:33:05,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:05" (1/1) ... [2021-10-11 02:33:05,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:33:05,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:05,950 WARN L226 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_a5c1e70b-fd4e-4792-8002-772c8029383f/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2021-10-11 02:33:05,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:06,004 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-11 02:33:06,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:06,032 WARN L226 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_a5c1e70b-fd4e-4792-8002-772c8029383f/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2021-10-11 02:33:06,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:06,072 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:33:06,097 WARN L226 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_a5c1e70b-fd4e-4792-8002-772c8029383f/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2021-10-11 02:33:06,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:06,143 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:33:06,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06 WrapperNode [2021-10-11 02:33:06,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:06,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:06,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:33:06,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:33:06,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:06,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:33:06,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:33:06,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:33:06,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:33:06,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:33:06,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:33:06,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:33:06,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:06,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:33:06,390 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-10-11 02:33:06,390 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-10-11 02:33:06,390 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-11 02:33:06,390 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-11 02:33:06,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:33:06,391 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-10-11 02:33:06,391 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-10-11 02:33:06,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:33:06,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:33:06,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:33:06,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-11 02:33:06,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:33:06,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:33:06,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-11 02:33:06,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:33:06,875 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:33:06,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:06 BoogieIcfgContainer [2021-10-11 02:33:06,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:33:06,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:33:06,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:33:06,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:33:06,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:33:05" (1/3) ... [2021-10-11 02:33:06,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af5f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:06, skipping insertion in model container [2021-10-11 02:33:06,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06" (2/3) ... [2021-10-11 02:33:06,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af5f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:06, skipping insertion in model container [2021-10-11 02:33:06,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:06" (3/3) ... [2021-10-11 02:33:06,885 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2021-10-11 02:33:06,898 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:33:06,902 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:33:06,912 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:33:06,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:33:06,936 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:33:06,936 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:33:06,937 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:33:06,937 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:33:06,937 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:33:06,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:33:06,937 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:33:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-10-11 02:33:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:33:06,958 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,959 INFO L429 AbstractCegarLoop]: === Iteration 1 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash -891537794, now seen corresponding path program 1 times [2021-10-11 02:33:06,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:06,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44414076] [2021-10-11 02:33:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:07,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:33:07,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:07,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:07,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44414076] [2021-10-11 02:33:07,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:07,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:33:07,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589243180] [2021-10-11 02:33:07,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:33:07,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:07,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:33:07,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:33:07,327 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2021-10-11 02:33:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:07,494 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2021-10-11 02:33:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:33:07,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-10-11 02:33:07,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:07,505 INFO L225 Difference]: With dead ends: 73 [2021-10-11 02:33:07,505 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:33:07,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:33:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:33:07,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-11 02:33:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 02:33:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-10-11 02:33:07,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 18 [2021-10-11 02:33:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:07,552 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-10-11 02:33:07,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:33:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-10-11 02:33:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 02:33:07,555 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:07,555 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:07,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:33:07,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:07,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:07,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1509693249, now seen corresponding path program 1 times [2021-10-11 02:33:07,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:07,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649352517] [2021-10-11 02:33:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:07,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:33:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:33:08,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:08,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649352517] [2021-10-11 02:33:08,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:08,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-11 02:33:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069610311] [2021-10-11 02:33:08,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:33:08,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:33:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:33:08,080 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 8 states. [2021-10-11 02:33:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:08,271 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-10-11 02:33:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:33:08,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-10-11 02:33:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:08,279 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:33:08,279 INFO L226 Difference]: Without dead ends: 36 [2021-10-11 02:33:08,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:33:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-11 02:33:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-11 02:33:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 02:33:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-10-11 02:33:08,306 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 28 [2021-10-11 02:33:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:08,307 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-10-11 02:33:08,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:33:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-10-11 02:33:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-11 02:33:08,311 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:08,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:33:08,531 INFO L429 AbstractCegarLoop]: === Iteration 3 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash -896236761, now seen corresponding path program 1 times [2021-10-11 02:33:08,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:08,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223393211] [2021-10-11 02:33:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:33:08,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:33:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:33:08,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:33:08,899 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:33:08,899 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:33:09,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:33:09,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:09 BoogieIcfgContainer [2021-10-11 02:33:09,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:09,179 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:09,179 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:09,180 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:09,180 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:06" (3/4) ... [2021-10-11 02:33:09,182 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:33:09,251 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c1e70b-fd4e-4792-8002-772c8029383f/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:33:09,251 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:09,259 INFO L168 Benchmark]: Toolchain (without parser) took 3551.51 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 41.2 MB in the beginning and 26.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,260 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 60.8 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:09,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 439.71 ms. Allocated memory is still 60.8 MB. Free memory was 41.1 MB in the beginning and 42.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,262 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.62 ms. Allocated memory is still 60.8 MB. Free memory was 42.9 MB in the beginning and 41.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,263 INFO L168 Benchmark]: Boogie Preprocessor took 68.27 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 40.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:09,263 INFO L168 Benchmark]: RCFGBuilder took 600.78 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 40.0 MB in the beginning and 64.8 MB in the end (delta: -24.8 MB). Peak memory consumption was 25.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,264 INFO L168 Benchmark]: TraceAbstraction took 2300.28 ms. Allocated memory is still 81.8 MB. Free memory was 64.3 MB in the beginning and 30.2 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,264 INFO L168 Benchmark]: Witness Printer took 71.61 ms. Allocated memory is still 81.8 MB. Free memory was 30.2 MB in the beginning and 26.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 60.8 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 439.71 ms. Allocated memory is still 60.8 MB. Free memory was 41.1 MB in the beginning and 42.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.62 ms. Allocated memory is still 60.8 MB. Free memory was 42.9 MB in the beginning and 41.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.27 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 40.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 600.78 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 40.0 MB in the beginning and 64.8 MB in the end (delta: -24.8 MB). Peak memory consumption was 25.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2300.28 ms. Allocated memory is still 81.8 MB. Free memory was 64.3 MB in the beginning and 30.2 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. * Witness Printer took 71.61 ms. Allocated memory is still 81.8 MB. Free memory was 30.2 MB in the beginning and 26.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L60] CALL nondet_tree() [L20] COND FALSE !(__VERIFIER_nondet_bool()) [L23] struct node *n = (struct node *)malloc(sizeof(struct node)); [L24] n->data = __VERIFIER_nondet_int() [L25] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L25] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={1:0}, n={1:0}, nondet_tree()={0:0}] [L25] n->left = nondet_tree() [L26] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L26] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={1:0}, n={1:0}, nondet_tree()={0:0}] [L26] n->right = nondet_tree() [L27] return n; VAL [\result={1:0}, malloc(sizeof(struct node))={1:0}, n={1:0}] [L60] RET nondet_tree() [L55] CALL, EXPR max(n) VAL [n={1:0}] [L32] COND FALSE !(!n) [L35] EXPR n->left VAL [n={1:0}, n={1:0}, n->left={0:0}] [L35] CALL, EXPR max(n->left) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L35] RET, EXPR max(n->left) VAL [max(n->left)=-2147483648, n={1:0}, n={1:0}, n->left={0:0}] [L35] int a = max(n->left); [L36] EXPR n->right VAL [a=2147483648, n={1:0}, n={1:0}, n->right={0:0}] [L36] CALL, EXPR max(n->right) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L36] RET, EXPR max(n->right) VAL [a=2147483648, max(n->right)=-2147483648, n={1:0}, n={1:0}, n->right={0:0}] [L36] int b = max(n->right); [L37] COND TRUE a >= b [L37] return a; VAL [\result=-2147483648, a=2147483648, b=2147483648, n={1:0}, n={1:0}] [L55] RET, EXPR max(n) [L55] int a = max(n); [L56] CALL check(n, a) [L43] COND TRUE \read(*n) [L44] n->data [L11] COND TRUE !cond [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 24 SDslu, 401 SDs, 0 SdLazy, 96 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 2644 SizeOfPredicates, 11 NumberOfNonLiveVariables, 189 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 9/9 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! Received shutdown request...