./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/count_down_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/count_down_unsafe.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 744113fc2ef40828e0832f07c1176e726449b166 .............................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 08:33:37,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 08:33:37,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 08:33:37,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 08:33:37,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 08:33:37,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 08:33:37,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 08:33:37,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 08:33:37,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 08:33:37,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 08:33:37,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 08:33:37,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 08:33:37,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 08:33:37,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 08:33:37,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 08:33:37,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 08:33:37,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 08:33:37,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 08:33:37,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 08:33:37,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 08:33:37,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 08:33:37,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 08:33:37,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 08:33:37,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 08:33:37,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 08:33:37,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 08:33:37,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 08:33:37,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 08:33:37,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 08:33:37,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 08:33:37,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 08:33:37,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 08:33:37,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 08:33:37,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 08:33:37,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 08:33:37,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 08:33:37,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 08:33:37,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 08:33:37,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 08:33:37,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 08:33:37,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 08:33:37,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-07-06 08:33:37,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 08:33:37,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 08:33:37,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 08:33:37,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 08:33:37,838 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 08:33:37,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 08:33:37,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 08:33:37,839 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 08:33:37,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 08:33:37,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 08:33:37,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 08:33:37,839 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 08:33:37,839 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 08:33:37,840 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 08:33:37,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 08:33:37,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 08:33:37,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 08:33:37,840 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 08:33:37,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 08:33:37,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 08:33:37,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 08:33:37,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 08:33:37,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 08:33:37,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 08:33:37,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 08:33:37,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 08:33:37,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 08:33:37,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 744113fc2ef40828e0832f07c1176e726449b166 [2021-07-06 08:33:38,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 08:33:38,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 08:33:38,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 08:33:38,095 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 08:33:38,096 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 08:33:38,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2021-07-06 08:33:38,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1832211/834555e55eff4629b44b1ce4e8609a3a/FLAGdf159ff16 [2021-07-06 08:33:38,531 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 08:33:38,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2021-07-06 08:33:38,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1832211/834555e55eff4629b44b1ce4e8609a3a/FLAGdf159ff16 [2021-07-06 08:33:38,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1832211/834555e55eff4629b44b1ce4e8609a3a [2021-07-06 08:33:38,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 08:33:38,933 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 08:33:38,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 08:33:38,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 08:33:38,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 08:33:38,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 08:33:38" (1/1) ... [2021-07-06 08:33:38,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d6c175a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:38, skipping insertion in model container [2021-07-06 08:33:38,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 08:33:38" (1/1) ... [2021-07-06 08:33:38,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 08:33:38,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 08:33:39,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 08:33:39,163 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 08:33:39,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 08:33:39,232 INFO L208 MainTranslator]: Completed translation [2021-07-06 08:33:39,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39 WrapperNode [2021-07-06 08:33:39,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 08:33:39,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 08:33:39,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 08:33:39,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 08:33:39,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (1/1) ... [2021-07-06 08:33:39,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (1/1) ... [2021-07-06 08:33:39,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (1/1) ... [2021-07-06 08:33:39,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (1/1) ... [2021-07-06 08:33:39,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (1/1) ... [2021-07-06 08:33:39,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (1/1) ... [2021-07-06 08:33:39,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (1/1) ... [2021-07-06 08:33:39,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 08:33:39,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 08:33:39,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 08:33:39,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 08:33:39,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (1/1) ... [2021-07-06 08:33:39,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 08:33:39,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 08:33:39,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-06 08:33:39,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-06 08:33:39,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 08:33:39,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 08:33:39,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-07-06 08:33:39,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-07-06 08:33:39,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-07-06 08:33:39,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-07-06 08:33:39,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-07-06 08:33:39,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 08:33:39,359 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-07-06 08:33:39,360 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-07-06 08:33:39,360 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-07-06 08:33:39,360 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-07-06 08:33:39,360 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-07-06 08:33:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-07-06 08:33:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-07-06 08:33:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-07-06 08:33:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-07-06 08:33:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-07-06 08:33:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-07-06 08:33:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-07-06 08:33:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-07-06 08:33:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-07-06 08:33:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-07-06 08:33:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-07-06 08:33:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-07-06 08:33:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-07-06 08:33:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-07-06 08:33:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-07-06 08:33:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-07-06 08:33:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-07-06 08:33:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-07-06 08:33:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-07-06 08:33:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-07-06 08:33:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-07-06 08:33:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-07-06 08:33:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-07-06 08:33:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-07-06 08:33:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-07-06 08:33:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-07-06 08:33:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-07-06 08:33:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-07-06 08:33:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-07-06 08:33:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-07-06 08:33:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-07-06 08:33:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-07-06 08:33:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-07-06 08:33:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-07-06 08:33:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-07-06 08:33:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-07-06 08:33:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-07-06 08:33:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-07-06 08:33:39,366 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-07-06 08:33:39,366 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-07-06 08:33:39,366 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-07-06 08:33:39,366 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-07-06 08:33:39,367 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-07-06 08:33:39,367 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-07-06 08:33:39,367 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-07-06 08:33:39,367 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-07-06 08:33:39,367 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-07-06 08:33:39,367 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-07-06 08:33:39,368 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-07-06 08:33:39,368 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-07-06 08:33:39,368 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-07-06 08:33:39,368 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-07-06 08:33:39,368 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-07-06 08:33:39,368 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-07-06 08:33:39,368 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-07-06 08:33:39,369 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-07-06 08:33:39,369 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-07-06 08:33:39,369 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-07-06 08:33:39,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-07-06 08:33:39,372 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-07-06 08:33:39,372 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-07-06 08:33:39,372 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-07-06 08:33:39,372 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-07-06 08:33:39,372 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-07-06 08:33:39,372 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-07-06 08:33:39,373 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-07-06 08:33:39,373 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-07-06 08:33:39,373 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-07-06 08:33:39,373 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-07-06 08:33:39,373 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-07-06 08:33:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-07-06 08:33:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-07-06 08:33:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-07-06 08:33:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-07-06 08:33:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-07-06 08:33:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-07-06 08:33:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-07-06 08:33:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-07-06 08:33:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-07-06 08:33:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-07-06 08:33:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-07-06 08:33:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-07-06 08:33:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-07-06 08:33:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-07-06 08:33:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-07-06 08:33:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-07-06 08:33:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-07-06 08:33:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-07-06 08:33:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-07-06 08:33:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-07-06 08:33:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-07-06 08:33:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-07-06 08:33:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-07-06 08:33:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-07-06 08:33:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-07-06 08:33:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-07-06 08:33:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-07-06 08:33:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-07-06 08:33:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-07-06 08:33:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-07-06 08:33:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-07-06 08:33:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-07-06 08:33:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-07-06 08:33:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 08:33:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 08:33:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 08:33:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-06 08:33:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-06 08:33:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 08:33:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 08:33:39,803 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 08:33:39,803 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-06 08:33:39,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 08:33:39 BoogieIcfgContainer [2021-07-06 08:33:39,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 08:33:39,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 08:33:39,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 08:33:39,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 08:33:39,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 08:33:38" (1/3) ... [2021-07-06 08:33:39,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@667e7c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 08:33:39, skipping insertion in model container [2021-07-06 08:33:39,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 08:33:39" (2/3) ... [2021-07-06 08:33:39,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@667e7c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 08:33:39, skipping insertion in model container [2021-07-06 08:33:39,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 08:33:39" (3/3) ... [2021-07-06 08:33:39,814 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down_unsafe.i [2021-07-06 08:33:39,819 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 08:33:39,819 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-07-06 08:33:39,853 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr0REQUIRES_VIOLATION ======== [2021-07-06 08:33:39,859 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 08:33:39,859 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 08:33:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 08:33:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 08:33:39,883 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 08:33:39,884 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 08:33:39,884 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION] === [2021-07-06 08:33:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 08:33:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514850, now seen corresponding path program 1 times [2021-07-06 08:33:39,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 08:33:39,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859961919] [2021-07-06 08:33:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 08:33:39,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 08:33:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 08:33:40,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 08:33:40,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 08:33:40,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 08:33:40,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 08:33:40,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 08:33:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 08:33:40,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 08:33:40,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 08:33:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 08:33:40,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 08:33:40,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859961919] [2021-07-06 08:33:40,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859961919] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 08:33:40,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 08:33:40,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 08:33:40,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775168070] [2021-07-06 08:33:40,066 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 08:33:40,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 08:33:40,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 08:33:40,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 08:33:40,077 INFO L87 Difference]: Start difference. First operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 08:33:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 08:33:40,154 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-07-06 08:33:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 08:33:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-07-06 08:33:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 08:33:40,159 INFO L225 Difference]: With dead ends: 32 [2021-07-06 08:33:40,159 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 08:33:40,160 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 08:33:40,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 08:33:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 08:33:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 08:33:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 08:33:40,176 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-07-06 08:33:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 08:33:40,176 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 08:33:40,176 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 08:33:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 08:33:40,176 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 08:33:40,178 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 08:33:40,179 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 08:33:40,181 INFO L303 ceAbstractionStarter]: Result for error location mainErr0REQUIRES_VIOLATION was SAFE (1/9) [2021-07-06 08:33:40,191 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr1REQUIRES_VIOLATION ======== [2021-07-06 08:33:40,192 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 08:33:40,192 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 08:33:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 08:33:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 08:33:40,199 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 08:33:40,199 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 08:33:40,199 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION] === [2021-07-06 08:33:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 08:33:40,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514849, now seen corresponding path program 1 times [2021-07-06 08:33:40,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 08:33:40,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755625744] [2021-07-06 08:33:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 08:33:40,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 08:33:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 08:33:40,228 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 08:33:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 08:33:40,244 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 08:33:40,262 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 08:33:40,263 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-06 08:33:40,263 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 08:33:40,263 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 08:33:40,263 INFO L303 ceAbstractionStarter]: Result for error location mainErr1REQUIRES_VIOLATION was UNSAFE (2/9) [2021-07-06 08:33:40,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 08:33:40 BoogieIcfgContainer [2021-07-06 08:33:40,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 08:33:40,278 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 08:33:40,278 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 08:33:40,278 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 08:33:40,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 08:33:39" (3/4) ... [2021-07-06 08:33:40,279 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-06 08:33:40,315 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 08:33:40,315 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 08:33:40,316 INFO L168 Benchmark]: Toolchain (without parser) took 1382.75 ms. Allocated memory was 52.4 MB in the beginning and 86.0 MB in the end (delta: 33.6 MB). Free memory was 26.0 MB in the beginning and 59.4 MB in the end (delta: -33.4 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. [2021-07-06 08:33:40,316 INFO L168 Benchmark]: CDTParser took 0.88 ms. Allocated memory is still 52.4 MB. Free memory was 32.7 MB in the beginning and 32.6 MB in the end (delta: 35.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 08:33:40,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.51 ms. Allocated memory is still 71.3 MB. Free memory was 55.5 MB in the beginning and 43.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-06 08:33:40,317 INFO L168 Benchmark]: Boogie Preprocessor took 61.53 ms. Allocated memory is still 71.3 MB. Free memory was 43.2 MB in the beginning and 41.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 08:33:40,317 INFO L168 Benchmark]: RCFGBuilder took 508.93 ms. Allocated memory is still 71.3 MB. Free memory was 40.8 MB in the beginning and 37.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2021-07-06 08:33:40,318 INFO L168 Benchmark]: TraceAbstraction took 470.68 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 36.7 MB in the beginning and 61.0 MB in the end (delta: -24.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 08:33:40,319 INFO L168 Benchmark]: Witness Printer took 37.25 ms. Allocated memory is still 86.0 MB. Free memory was 61.0 MB in the beginning and 59.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 08:33:40,322 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.88 ms. Allocated memory is still 52.4 MB. Free memory was 32.7 MB in the beginning and 32.6 MB in the end (delta: 35.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.51 ms. Allocated memory is still 71.3 MB. Free memory was 55.5 MB in the beginning and 43.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.53 ms. Allocated memory is still 71.3 MB. Free memory was 43.2 MB in the beginning and 41.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 508.93 ms. Allocated memory is still 71.3 MB. Free memory was 40.8 MB in the beginning and 37.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 470.68 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 36.7 MB in the beginning and 61.0 MB in the end (delta: -24.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 37.25 ms. Allocated memory is still 86.0 MB. Free memory was 61.0 MB in the beginning and 59.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - CounterExampleResult [Line: 524]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L513] int i, j; [L514] int val; [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L516] length = 1 VAL [length=1] [L517] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={2:0}, arr={2:0}, length=1] [L518] COND FALSE !(!arr) [L519] i=0 VAL [__builtin_alloca (length)={2:0}, arr={2:0}, i=0, length=1] [L519] COND TRUE i