./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.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/list-simple/dll2n_remove_all_reverse.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 0ce920e15f46d58ceba7fe374bfd0d01be2609b3 ....................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/list-simple/dll2n_remove_all_reverse.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 0ce920e15f46d58ceba7fe374bfd0d01be2609b3 ............................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 11:27:18,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 11:27:18,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 11:27:18,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 11:27:18,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 11:27:18,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 11:27:18,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 11:27:18,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 11:27:18,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 11:27:18,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 11:27:18,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 11:27:18,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 11:27:18,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 11:27:18,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 11:27:18,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 11:27:18,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 11:27:18,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 11:27:18,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 11:27:18,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 11:27:18,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 11:27:18,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 11:27:18,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 11:27:18,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 11:27:18,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 11:27:18,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 11:27:18,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 11:27:18,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 11:27:18,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 11:27:18,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 11:27:18,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 11:27:18,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 11:27:18,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 11:27:18,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 11:27:18,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 11:27:18,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 11:27:18,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 11:27:18,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 11:27:18,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 11:27:18,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 11:27:18,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 11:27:18,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 11:27:19,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-07-06 11:27:19,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 11:27:19,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 11:27:19,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 11:27:19,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 11:27:19,028 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 11:27:19,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 11:27:19,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 11:27:19,029 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 11:27:19,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 11:27:19,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 11:27:19,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 11:27:19,030 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 11:27:19,030 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 11:27:19,030 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 11:27:19,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 11:27:19,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 11:27:19,030 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 11:27:19,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 11:27:19,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 11:27:19,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 11:27:19,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 11:27:19,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 11:27:19,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 11:27:19,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 11:27:19,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 11:27:19,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 11:27:19,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 11:27:19,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ce920e15f46d58ceba7fe374bfd0d01be2609b3 [2021-07-06 11:27:19,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 11:27:19,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 11:27:19,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 11:27:19,324 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 11:27:19,325 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 11:27:19,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2021-07-06 11:27:19,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b51fad5e/4f53511b132b44ec8b03067e992990fd/FLAG5c9a83bcb [2021-07-06 11:27:19,805 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 11:27:19,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2021-07-06 11:27:19,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b51fad5e/4f53511b132b44ec8b03067e992990fd/FLAG5c9a83bcb [2021-07-06 11:27:19,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b51fad5e/4f53511b132b44ec8b03067e992990fd [2021-07-06 11:27:19,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 11:27:19,835 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 11:27:19,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 11:27:19,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 11:27:19,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 11:27:19,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 11:27:19" (1/1) ... [2021-07-06 11:27:19,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21cf0bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:19, skipping insertion in model container [2021-07-06 11:27:19,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 11:27:19" (1/1) ... [2021-07-06 11:27:19,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 11:27:19,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 11:27:20,143 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2021-07-06 11:27:20,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 11:27:20,153 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 11:27:20,184 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2021-07-06 11:27:20,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 11:27:20,220 INFO L208 MainTranslator]: Completed translation [2021-07-06 11:27:20,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20 WrapperNode [2021-07-06 11:27:20,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 11:27:20,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 11:27:20,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 11:27:20,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 11:27:20,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (1/1) ... [2021-07-06 11:27:20,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (1/1) ... [2021-07-06 11:27:20,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (1/1) ... [2021-07-06 11:27:20,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (1/1) ... [2021-07-06 11:27:20,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (1/1) ... [2021-07-06 11:27:20,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (1/1) ... [2021-07-06 11:27:20,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (1/1) ... [2021-07-06 11:27:20,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 11:27:20,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 11:27:20,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 11:27:20,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 11:27:20,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (1/1) ... [2021-07-06 11:27:20,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 11:27:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 11:27:20,294 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 11:27:20,296 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 11:27:20,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 11:27:20,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 11:27:20,323 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-07-06 11:27:20,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-07-06 11:27:20,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-07-06 11:27:20,324 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-07-06 11:27:20,324 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-07-06 11:27:20,324 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-07-06 11:27:20,325 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_last [2021-07-06 11:27:20,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 11:27:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-07-06 11:27:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-07-06 11:27:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-07-06 11:27:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-07-06 11:27:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-07-06 11:27:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 11:27:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-07-06 11:27:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-07-06 11:27:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-07-06 11:27:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-07-06 11:27:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-07-06 11:27:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-07-06 11:27:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-07-06 11:27:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-07-06 11:27:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-07-06 11:27:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-07-06 11:27:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-07-06 11:27:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-07-06 11:27:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-07-06 11:27:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-07-06 11:27:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-07-06 11:27:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-07-06 11:27:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-07-06 11:27:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-07-06 11:27:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-07-06 11:27:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-07-06 11:27:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-07-06 11:27:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-07-06 11:27:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-07-06 11:27:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-07-06 11:27:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-07-06 11:27:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-07-06 11:27:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-07-06 11:27:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-07-06 11:27:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-07-06 11:27:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-07-06 11:27:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-07-06 11:27:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-07-06 11:27:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-07-06 11:27:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-07-06 11:27:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-07-06 11:27:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-07-06 11:27:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-07-06 11:27:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-07-06 11:27:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-07-06 11:27:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-07-06 11:27:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-07-06 11:27:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-07-06 11:27:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-07-06 11:27:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-07-06 11:27:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-07-06 11:27:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-07-06 11:27:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-07-06 11:27:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-07-06 11:27:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-07-06 11:27:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-07-06 11:27:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-07-06 11:27:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-07-06 11:27:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-07-06 11:27:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-07-06 11:27:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-07-06 11:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-07-06 11:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-07-06 11:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-07-06 11:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-07-06 11:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-07-06 11:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-07-06 11:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-07-06 11:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-07-06 11:27:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-07-06 11:27:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-07-06 11:27:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-07-06 11:27:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-07-06 11:27:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-07-06 11:27:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-07-06 11:27:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-07-06 11:27:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-07-06 11:27:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-07-06 11:27:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-07-06 11:27:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-07-06 11:27:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-07-06 11:27:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-07-06 11:27:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-07-06 11:27:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-07-06 11:27:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-07-06 11:27:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-07-06 11:27:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-07-06 11:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-07-06 11:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-07-06 11:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-07-06 11:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-07-06 11:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-07-06 11:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-07-06 11:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-07-06 11:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-07-06 11:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-07-06 11:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-07-06 11:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-07-06 11:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-06 11:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-07-06 11:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_last [2021-07-06 11:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-07-06 11:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 11:27:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 11:27:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-07-06 11:27:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 11:27:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-06 11:27:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 11:27:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-06 11:27:20,630 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-07-06 11:27:20,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 11:27:20,867 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-06 11:27:20,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 11:27:20 BoogieIcfgContainer [2021-07-06 11:27:20,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 11:27:20,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 11:27:20,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 11:27:20,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 11:27:20,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 11:27:19" (1/3) ... [2021-07-06 11:27:20,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e474305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 11:27:20, skipping insertion in model container [2021-07-06 11:27:20,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:20" (2/3) ... [2021-07-06 11:27:20,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e474305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 11:27:20, skipping insertion in model container [2021-07-06 11:27:20,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 11:27:20" (3/3) ... [2021-07-06 11:27:20,877 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2021-07-06 11:27:20,883 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 11:27:20,884 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2021-07-06 11:27:20,916 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == node_createErr0REQUIRES_VIOLATION ======== [2021-07-06 11:27:20,922 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 11:27:20,922 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 11:27:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 44 states have (on average 2.0) internal successors, (88), 78 states have internal predecessors, (88), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-06 11:27:20,941 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 11:27:20,943 INFO L374 AbstractCegarLoop]: === Iteration 1 === [node_createErr0REQUIRES_VIOLATION] === [2021-07-06 11:27:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 11:27:20,947 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.PathProgramCache.addRun(PathProgramCache.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.StrategyFactory.constructStrategy(StrategyFactory.java:135) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.StrategyFactory.constructStrategy(StrategyFactory.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.isCounterexampleFeasibleInternal(AbstractCegarLoop.java:488) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:382) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:320) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:298) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:258) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-07-06 11:27:20,951 INFO L168 Benchmark]: Toolchain (without parser) took 1115.50 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 33.4 MB in the beginning and 40.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:20,952 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 56.6 MB. Free memory was 38.2 MB in the beginning and 38.2 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 11:27:20,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.89 ms. Allocated memory is still 56.6 MB. Free memory was 33.2 MB in the beginning and 26.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:20,953 INFO L168 Benchmark]: Boogie Preprocessor took 46.42 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 26.0 MB in the beginning and 55.7 MB in the end (delta: -29.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:20,953 INFO L168 Benchmark]: RCFGBuilder took 603.13 ms. Allocated memory is still 73.4 MB. Free memory was 55.7 MB in the beginning and 47.2 MB in the end (delta: 8.5 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:20,954 INFO L168 Benchmark]: TraceAbstraction took 76.56 ms. Allocated memory is still 73.4 MB. Free memory was 46.7 MB in the beginning and 40.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:20,959 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 56.6 MB. Free memory was 38.2 MB in the beginning and 38.2 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 383.89 ms. Allocated memory is still 56.6 MB. Free memory was 33.2 MB in the beginning and 26.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.42 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 26.0 MB in the beginning and 55.7 MB in the end (delta: -29.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 603.13 ms. Allocated memory is still 73.4 MB. Free memory was 55.7 MB in the beginning and 47.2 MB in the end (delta: 8.5 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 76.56 ms. Allocated memory is still 73.4 MB. Free memory was 46.7 MB in the beginning and 40.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.PathProgramCache.addRun(PathProgramCache.java:68) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-07-06 11:27:20,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 11:27:22,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 11:27:22,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 11:27:22,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 11:27:22,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 11:27:22,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 11:27:22,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 11:27:22,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 11:27:22,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 11:27:22,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 11:27:22,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 11:27:22,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 11:27:22,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 11:27:22,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 11:27:22,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 11:27:22,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 11:27:22,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 11:27:22,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 11:27:22,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 11:27:22,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 11:27:22,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 11:27:22,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 11:27:22,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 11:27:22,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 11:27:22,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 11:27:22,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 11:27:22,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 11:27:22,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 11:27:22,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 11:27:22,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 11:27:22,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 11:27:22,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 11:27:22,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 11:27:22,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 11:27:22,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 11:27:22,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 11:27:22,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 11:27:22,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 11:27:22,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 11:27:22,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 11:27:22,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 11:27:22,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-07-06 11:27:22,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 11:27:22,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 11:27:22,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 11:27:22,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 11:27:22,576 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 11:27:22,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 11:27:22,576 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 11:27:22,577 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 11:27:22,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 11:27:22,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 11:27:22,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 11:27:22,577 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 11:27:22,577 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 11:27:22,577 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 11:27:22,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 11:27:22,578 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 11:27:22,578 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-07-06 11:27:22,578 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-07-06 11:27:22,578 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 11:27:22,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 11:27:22,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 11:27:22,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 11:27:22,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 11:27:22,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 11:27:22,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 11:27:22,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 11:27:22,579 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-07-06 11:27:22,579 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-07-06 11:27:22,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 11:27:22,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-07-06 11:27:22,580 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:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ce920e15f46d58ceba7fe374bfd0d01be2609b3 [2021-07-06 11:27:22,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 11:27:22,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 11:27:22,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 11:27:22,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 11:27:22,849 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 11:27:22,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2021-07-06 11:27:22,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de000c9ab/d6895fe7809b499791f7b0b3f00936fc/FLAG430fc1550 [2021-07-06 11:27:23,302 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 11:27:23,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2021-07-06 11:27:23,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de000c9ab/d6895fe7809b499791f7b0b3f00936fc/FLAG430fc1550 [2021-07-06 11:27:23,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de000c9ab/d6895fe7809b499791f7b0b3f00936fc [2021-07-06 11:27:23,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 11:27:23,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 11:27:23,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 11:27:23,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 11:27:23,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 11:27:23,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a672aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23, skipping insertion in model container [2021-07-06 11:27:23,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 11:27:23,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 11:27:23,560 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2021-07-06 11:27:23,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 11:27:23,571 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 11:27:23,616 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2021-07-06 11:27:23,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 11:27:23,652 INFO L208 MainTranslator]: Completed translation [2021-07-06 11:27:23,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23 WrapperNode [2021-07-06 11:27:23,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 11:27:23,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 11:27:23,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 11:27:23,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 11:27:23,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 11:27:23,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 11:27:23,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 11:27:23,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 11:27:23,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (1/1) ... [2021-07-06 11:27:23,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 11:27:23,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 11:27:23,752 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 11:27:23,764 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 11:27:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 11:27:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 11:27:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-07-06 11:27:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-07-06 11:27:23,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-07-06 11:27:23,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-07-06 11:27:23,802 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-07-06 11:27:23,802 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-07-06 11:27:23,803 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-07-06 11:27:23,803 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_last [2021-07-06 11:27:23,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 11:27:23,803 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-07-06 11:27:23,803 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-07-06 11:27:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-07-06 11:27:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-07-06 11:27:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-07-06 11:27:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 11:27:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-07-06 11:27:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-07-06 11:27:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-07-06 11:27:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-07-06 11:27:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-07-06 11:27:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-07-06 11:27:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-07-06 11:27:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-07-06 11:27:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-07-06 11:27:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-07-06 11:27:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-07-06 11:27:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-07-06 11:27:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-07-06 11:27:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-07-06 11:27:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-07-06 11:27:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-07-06 11:27:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-07-06 11:27:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-07-06 11:27:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-07-06 11:27:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-07-06 11:27:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-07-06 11:27:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-07-06 11:27:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-07-06 11:27:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-07-06 11:27:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-07-06 11:27:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-07-06 11:27:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-07-06 11:27:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-07-06 11:27:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-07-06 11:27:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-07-06 11:27:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-07-06 11:27:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-07-06 11:27:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-07-06 11:27:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-07-06 11:27:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-07-06 11:27:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-07-06 11:27:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-07-06 11:27:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-07-06 11:27:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-07-06 11:27:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-07-06 11:27:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-07-06 11:27:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-07-06 11:27:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-07-06 11:27:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-07-06 11:27:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-07-06 11:27:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-07-06 11:27:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-07-06 11:27:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-07-06 11:27:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-07-06 11:27:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-07-06 11:27:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-07-06 11:27:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-07-06 11:27:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-07-06 11:27:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-07-06 11:27:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-07-06 11:27:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-07-06 11:27:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-07-06 11:27:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-07-06 11:27:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-07-06 11:27:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-07-06 11:27:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-07-06 11:27:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-07-06 11:27:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-07-06 11:27:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-07-06 11:27:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-07-06 11:27:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-07-06 11:27:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-07-06 11:27:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-07-06 11:27:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-07-06 11:27:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-07-06 11:27:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-07-06 11:27:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-07-06 11:27:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-07-06 11:27:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-07-06 11:27:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-07-06 11:27:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-07-06 11:27:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-07-06 11:27:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-07-06 11:27:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-07-06 11:27:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-07-06 11:27:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-07-06 11:27:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-07-06 11:27:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-07-06 11:27:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-07-06 11:27:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-07-06 11:27:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-07-06 11:27:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-07-06 11:27:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-07-06 11:27:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-07-06 11:27:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-07-06 11:27:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-07-06 11:27:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-07-06 11:27:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-07-06 11:27:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-07-06 11:27:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-07-06 11:27:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-07-06 11:27:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-07-06 11:27:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-07-06 11:27:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-07-06 11:27:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-07-06 11:27:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-07-06 11:27:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-07-06 11:27:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-07-06 11:27:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-07-06 11:27:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-07-06 11:27:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-07-06 11:27:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-07-06 11:27:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-07-06 11:27:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-07-06 11:27:23,825 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-07-06 11:27:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_last [2021-07-06 11:27:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-07-06 11:27:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 11:27:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 11:27:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-07-06 11:27:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 11:27:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-07-06 11:27:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 11:27:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-07-06 11:27:23,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-07-06 11:27:23,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-07-06 11:27:23,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-07-06 11:27:24,275 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-07-06 11:27:24,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 11:27:24,595 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-06 11:27:24,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 11:27:24 BoogieIcfgContainer [2021-07-06 11:27:24,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 11:27:24,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 11:27:24,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 11:27:24,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 11:27:24,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 11:27:23" (1/3) ... [2021-07-06 11:27:24,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fd8961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 11:27:24, skipping insertion in model container [2021-07-06 11:27:24,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 11:27:23" (2/3) ... [2021-07-06 11:27:24,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fd8961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 11:27:24, skipping insertion in model container [2021-07-06 11:27:24,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 11:27:24" (3/3) ... [2021-07-06 11:27:24,601 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2021-07-06 11:27:24,605 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 11:27:24,605 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2021-07-06 11:27:24,630 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == node_createErr0REQUIRES_VIOLATION ======== [2021-07-06 11:27:24,634 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 11:27:24,634 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 11:27:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 44 states have (on average 2.0) internal successors, (88), 78 states have internal predecessors, (88), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-06 11:27:24,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 11:27:24,651 INFO L374 AbstractCegarLoop]: === Iteration 1 === [node_createErr0REQUIRES_VIOLATION] === [2021-07-06 11:27:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 11:27:24,656 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.PathProgramCache.addRun(PathProgramCache.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.StrategyFactory.constructStrategy(StrategyFactory.java:135) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.StrategyFactory.constructStrategy(StrategyFactory.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.isCounterexampleFeasibleInternal(AbstractCegarLoop.java:488) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:382) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:320) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:298) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:258) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-07-06 11:27:24,660 INFO L168 Benchmark]: Toolchain (without parser) took 1328.19 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 47.2 MB in the beginning and 57.5 MB in the end (delta: -10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:24,660 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 67.1 MB. Free memory is still 50.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 11:27:24,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.63 ms. Allocated memory is still 67.1 MB. Free memory was 47.1 MB in the beginning and 37.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:24,661 INFO L168 Benchmark]: Boogie Preprocessor took 62.40 ms. Allocated memory is still 67.1 MB. Free memory was 37.3 MB in the beginning and 34.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:24,662 INFO L168 Benchmark]: RCFGBuilder took 880.18 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 34.0 MB in the beginning and 63.8 MB in the end (delta: -29.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:24,662 INFO L168 Benchmark]: TraceAbstraction took 60.64 ms. Allocated memory is still 86.0 MB. Free memory was 63.3 MB in the beginning and 58.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-07-06 11:27:24,667 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 67.1 MB. Free memory is still 50.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 321.63 ms. Allocated memory is still 67.1 MB. Free memory was 47.1 MB in the beginning and 37.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.40 ms. Allocated memory is still 67.1 MB. Free memory was 37.3 MB in the beginning and 34.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 880.18 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 34.0 MB in the beginning and 63.8 MB in the end (delta: -29.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 60.64 ms. Allocated memory is still 86.0 MB. Free memory was 63.3 MB in the beginning and 58.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.PathProgramCache.addRun(PathProgramCache.java:68) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-07-06 11:27:24,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...