./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-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan --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-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan --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 [2020-12-09 04:51:08,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:51:08,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:51:08,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:51:08,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:51:08,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:51:08,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:51:08,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:51:08,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:51:08,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:51:08,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:51:08,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:51:08,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:51:08,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:51:08,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:51:08,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:51:08,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:51:08,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:51:08,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:51:08,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:51:08,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:51:08,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:51:08,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:51:08,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:51:08,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:51:08,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:51:08,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:51:08,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:51:08,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:51:08,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:51:08,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:51:08,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:51:08,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:51:08,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:51:08,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:51:08,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:51:08,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:51:08,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:51:08,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:51:08,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:51:08,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:51:08,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:51:08,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:51:08,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:51:08,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:51:08,405 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:51:08,405 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:51:08,405 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:51:08,406 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:51:08,406 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:51:08,406 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:51:08,406 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:51:08,406 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:51:08,406 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:51:08,406 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:51:08,407 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:51:08,407 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:51:08,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:51:08,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:51:08,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:51:08,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:51:08,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:51:08,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:51:08,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:51:08,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:51:08,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:51:08,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:51:08,409 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:51:08,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:51:08,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:51:08,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:51:08,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:51:08,410 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-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdb95a531f91b891105aa672579f7a5a4ed687cf [2020-12-09 04:51:08,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:51:08,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:51:08,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:51:08,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:51:08,614 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:51:08,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2020-12-09 04:51:08,653 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data/199ead576/763bb52e6f844f1cb58d663f6bbad6bd/FLAGfca5668a0 [2020-12-09 04:51:09,019 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:51:09,019 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2020-12-09 04:51:09,024 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data/199ead576/763bb52e6f844f1cb58d663f6bbad6bd/FLAGfca5668a0 [2020-12-09 04:51:09,431 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data/199ead576/763bb52e6f844f1cb58d663f6bbad6bd [2020-12-09 04:51:09,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:51:09,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:51:09,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:51:09,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:51:09,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:51:09,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:51:09" (1/1) ... [2020-12-09 04:51:09,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afeecdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:09, skipping insertion in model container [2020-12-09 04:51:09,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:51:09" (1/1) ... [2020-12-09 04:51:09,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:51:09,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:51:09,541 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2020-12-09 04:51:09,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:51:09,560 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) [2020-12-09 04:51:09,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ff00266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:09, skipping insertion in model container [2020-12-09 04:51:09,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:51:09,561 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2020-12-09 04:51:09,563 INFO L168 Benchmark]: Toolchain (without parser) took 127.71 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 72.4 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:09,564 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 73.4 MB. Free memory was 43.8 MB in the beginning and 43.8 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:51:09,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 126.23 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 72.4 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:09,566 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 73.4 MB. Free memory was 43.8 MB in the beginning and 43.8 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 126.23 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 72.4 MB in the end (delta: 8.1 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 [2020-12-09 04:51:10,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:51:10,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:51:10,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:51:10,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:51:10,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:51:10,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:51:10,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:51:10,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:51:10,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:51:10,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:51:10,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:51:10,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:51:10,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:51:10,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:51:10,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:51:10,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:51:10,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:51:10,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:51:10,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:51:10,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:51:10,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:51:10,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:51:10,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:51:10,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:51:10,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:51:10,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:51:10,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:51:10,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:51:10,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:51:10,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:51:10,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:51:10,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:51:10,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:51:10,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:51:10,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:51:10,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:51:10,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:51:10,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:51:10,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:51:10,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:51:10,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 04:51:11,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:51:11,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:51:11,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:51:11,018 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:51:11,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:51:11,019 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:51:11,019 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:51:11,019 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:51:11,019 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:51:11,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:51:11,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:51:11,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:51:11,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:51:11,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:51:11,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:51:11,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:51:11,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:51:11,021 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 04:51:11,021 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 04:51:11,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:51:11,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:51:11,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:51:11,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:51:11,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:51:11,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 04:51:11,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:51:11,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:51:11,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:51:11,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:51:11,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:51:11,023 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 04:51:11,023 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 04:51:11,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:51:11,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:51:11,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:51:11,023 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-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdb95a531f91b891105aa672579f7a5a4ed687cf [2020-12-09 04:51:11,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:51:11,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:51:11,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:51:11,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:51:11,263 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:51:11,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2020-12-09 04:51:11,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data/9c37af6a3/b835d5a6287647ffafbaf5c86a19373c/FLAG921849f54 [2020-12-09 04:51:11,684 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:51:11,684 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2020-12-09 04:51:11,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data/9c37af6a3/b835d5a6287647ffafbaf5c86a19373c/FLAG921849f54 [2020-12-09 04:51:11,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/data/9c37af6a3/b835d5a6287647ffafbaf5c86a19373c [2020-12-09 04:51:11,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:51:11,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:51:11,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:51:11,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:51:11,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:51:11,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f1deac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11, skipping insertion in model container [2020-12-09 04:51:11,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:51:11,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:51:11,831 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2020-12-09 04:51:11,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:51:11,860 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2020-12-09 04:51:11,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:51:11,873 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2020-12-09 04:51:11,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:51:11,891 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:51:11,902 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2020-12-09 04:51:11,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:51:11,927 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:51:11,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11 WrapperNode [2020-12-09 04:51:11,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:51:11,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:51:11,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:51:11,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:51:11,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:51:11,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:51:11,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:51:11,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:51:11,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... [2020-12-09 04:51:11,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:51:11,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:51:11,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:51:11,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:51:11,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/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 [2020-12-09 04:51:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 04:51:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-12-09 04:51:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-12-09 04:51:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-12-09 04:51:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-12-09 04:51:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 04:51:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-12-09 04:51:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-12-09 04:51:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 04:51:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:51:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 04:51:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 04:51:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:51:12,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:51:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 04:51:12,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:51:12,364 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 04:51:12,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:51:12 BoogieIcfgContainer [2020-12-09 04:51:12,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:51:12,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:51:12,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:51:12,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:51:12,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:51:11" (1/3) ... [2020-12-09 04:51:12,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e53fe9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:51:12, skipping insertion in model container [2020-12-09 04:51:12,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:51:11" (2/3) ... [2020-12-09 04:51:12,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e53fe9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:51:12, skipping insertion in model container [2020-12-09 04:51:12,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:51:12" (3/3) ... [2020-12-09 04:51:12,373 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-12-09 04:51:12,387 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:51:12,389 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 04:51:12,400 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 04:51:12,423 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:51:12,423 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:51:12,423 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:51:12,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:51:12,424 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:51:12,424 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:51:12,424 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:51:12,424 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:51:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-09 04:51:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 04:51:12,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:51:12,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:51:12,445 INFO L429 AbstractCegarLoop]: === Iteration 1 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:51:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:51:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash -891537794, now seen corresponding path program 1 times [2020-12-09 04:51:12,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:51:12,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964573434] [2020-12-09 04:51:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/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 [2020-12-09 04:51:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:51:12,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 04:51:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:51:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:51:12,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:51:12,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964573434] [2020-12-09 04:51:12,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:51:12,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 04:51:12,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239653226] [2020-12-09 04:51:12,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 04:51:12,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:51:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 04:51:12,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:51:12,695 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-12-09 04:51:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:51:12,789 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2020-12-09 04:51:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 04:51:12,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-09 04:51:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:51:12,797 INFO L225 Difference]: With dead ends: 73 [2020-12-09 04:51:12,797 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 04:51:12,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-09 04:51:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 04:51:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 04:51:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 04:51:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-12-09 04:51:12,827 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 18 [2020-12-09 04:51:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:51:12,828 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-12-09 04:51:12,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 04:51:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-12-09 04:51:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 04:51:12,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:51:12,829 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] [2020-12-09 04:51:13,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 04:51:13,031 INFO L429 AbstractCegarLoop]: === Iteration 2 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:51:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:51:13,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1509693249, now seen corresponding path program 1 times [2020-12-09 04:51:13,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:51:13,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831598752] [2020-12-09 04:51:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/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 [2020-12-09 04:51:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:51:13,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 04:51:13,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:51:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 04:51:13,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:51:13,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831598752] [2020-12-09 04:51:13,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:51:13,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 04:51:13,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870799318] [2020-12-09 04:51:13,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:51:13,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:51:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:51:13,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:51:13,320 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 8 states. [2020-12-09 04:51:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:51:13,448 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-12-09 04:51:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 04:51:13,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-09 04:51:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:51:13,451 INFO L225 Difference]: With dead ends: 47 [2020-12-09 04:51:13,451 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 04:51:13,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-09 04:51:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 04:51:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-09 04:51:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-09 04:51:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2020-12-09 04:51:13,461 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 28 [2020-12-09 04:51:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:51:13,461 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2020-12-09 04:51:13,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:51:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-12-09 04:51:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-09 04:51:13,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:51:13,464 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] [2020-12-09 04:51:13,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 04:51:13,665 INFO L429 AbstractCegarLoop]: === Iteration 3 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:51:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:51:13,666 INFO L82 PathProgramCache]: Analyzing trace with hash -896236761, now seen corresponding path program 1 times [2020-12-09 04:51:13,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:51:13,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308563593] [2020-12-09 04:51:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/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 [2020-12-09 04:51:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:51:13,828 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:51:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:51:13,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:51:13,938 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 04:51:13,938 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:51:14,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 04:51:14,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:51:14 BoogieIcfgContainer [2020-12-09 04:51:14,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:51:14,248 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:51:14,248 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:51:14,248 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:51:14,249 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:51:12" (3/4) ... [2020-12-09 04:51:14,251 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 04:51:14,288 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f0238396-f5c3-4e7a-959b-809480bc58a2/bin/utaipan/witness.graphml [2020-12-09 04:51:14,288 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:51:14,290 INFO L168 Benchmark]: Toolchain (without parser) took 2584.49 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 47.9 MB in the beginning and 67.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:14,290 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 65.0 MB. Free memory is still 47.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:51:14,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.75 ms. Allocated memory is still 65.0 MB. Free memory was 47.8 MB in the beginning and 47.2 MB in the end (delta: 587.6 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:14,291 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.32 ms. Allocated memory is still 65.0 MB. Free memory was 47.0 MB in the beginning and 45.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:14,291 INFO L168 Benchmark]: Boogie Preprocessor took 28.03 ms. Allocated memory is still 65.0 MB. Free memory was 45.6 MB in the beginning and 44.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:51:14,292 INFO L168 Benchmark]: RCFGBuilder took 373.09 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 44.1 MB in the beginning and 67.2 MB in the end (delta: -23.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:14,292 INFO L168 Benchmark]: TraceAbstraction took 1880.19 ms. Allocated memory is still 90.2 MB. Free memory was 66.8 MB in the beginning and 70.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:14,292 INFO L168 Benchmark]: Witness Printer took 40.26 ms. Allocated memory is still 90.2 MB. Free memory was 70.8 MB in the beginning and 67.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:14,294 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 65.0 MB. Free memory is still 47.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 222.75 ms. Allocated memory is still 65.0 MB. Free memory was 47.8 MB in the beginning and 47.2 MB in the end (delta: 587.6 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.32 ms. Allocated memory is still 65.0 MB. Free memory was 47.0 MB in the beginning and 45.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.03 ms. Allocated memory is still 65.0 MB. Free memory was 45.6 MB in the beginning and 44.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 373.09 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 44.1 MB in the beginning and 67.2 MB in the end (delta: -23.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1880.19 ms. Allocated memory is still 90.2 MB. Free memory was 66.8 MB in the beginning and 70.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. * Witness Printer took 40.26 ms. Allocated memory is still 90.2 MB. Free memory was 70.8 MB in the beginning and 67.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 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: 1.7s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, 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, 0.1s 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, 0.2s 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...