./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 839c364b 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/AutomizerTermination.xml -i ../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-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(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e14aa3eeddc5d261248d26114db1375e0f229d6456e2c7754877a082dc10921 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 23:55:32,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 23:55:32,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 23:55:32,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 23:55:32,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 23:55:32,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 23:55:32,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 23:55:32,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 23:55:32,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 23:55:33,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 23:55:33,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 23:55:33,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 23:55:33,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 23:55:33,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 23:55:33,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 23:55:33,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 23:55:33,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 23:55:33,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 23:55:33,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 23:55:33,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 23:55:33,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 23:55:33,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 23:55:33,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 23:55:33,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 23:55:33,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 23:55:33,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 23:55:33,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 23:55:33,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 23:55:33,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 23:55:33,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 23:55:33,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 23:55:33,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 23:55:33,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 23:55:33,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 23:55:33,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 23:55:33,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 23:55:33,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 23:55:33,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 23:55:33,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 23:55:33,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 23:55:33,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 23:55:33,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-14 23:55:33,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 23:55:33,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 23:55:33,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 23:55:33,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 23:55:33,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 23:55:33,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 23:55:33,087 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 23:55:33,087 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-14 23:55:33,087 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-14 23:55:33,088 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-14 23:55:33,088 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-14 23:55:33,089 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-14 23:55:33,089 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-14 23:55:33,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 23:55:33,089 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 23:55:33,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 23:55:33,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 23:55:33,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 23:55:33,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 23:55:33,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-14 23:55:33,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-14 23:55:33,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-14 23:55:33,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 23:55:33,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 23:55:33,091 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-14 23:55:33,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 23:55:33,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-14 23:55:33,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 23:55:33,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 23:55:33,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 23:55:33,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 23:55:33,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 23:55:33,094 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-14 23:55:33,094 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e14aa3eeddc5d261248d26114db1375e0f229d6456e2c7754877a082dc10921 [2021-12-14 23:55:33,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 23:55:33,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 23:55:33,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 23:55:33,411 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 23:55:33,412 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 23:55:33,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2021-12-14 23:55:33,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88533fbc7/eae4947c79394e9793a575a93dc5edab/FLAG7e2b5009a [2021-12-14 23:55:34,010 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 23:55:34,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2021-12-14 23:55:34,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88533fbc7/eae4947c79394e9793a575a93dc5edab/FLAG7e2b5009a [2021-12-14 23:55:34,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88533fbc7/eae4947c79394e9793a575a93dc5edab [2021-12-14 23:55:34,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 23:55:34,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 23:55:34,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 23:55:34,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 23:55:34,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 23:55:34,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:55:34" (1/1) ... [2021-12-14 23:55:34,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dcfc07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:34, skipping insertion in model container [2021-12-14 23:55:34,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:55:34" (1/1) ... [2021-12-14 23:55:34,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 23:55:34,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 23:55:34,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 23:55:34,909 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 23:55:34,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 23:55:35,027 INFO L208 MainTranslator]: Completed translation [2021-12-14 23:55:35,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35 WrapperNode [2021-12-14 23:55:35,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 23:55:35,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 23:55:35,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 23:55:35,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 23:55:35,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,102 INFO L137 Inliner]: procedures = 123, calls = 49, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 129 [2021-12-14 23:55:35,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 23:55:35,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 23:55:35,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 23:55:35,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 23:55:35,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 23:55:35,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 23:55:35,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 23:55:35,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 23:55:35,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (1/1) ... [2021-12-14 23:55:35,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 23:55:35,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 23:55:35,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 23:55:35,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-14 23:55:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 23:55:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 23:55:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 23:55:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 23:55:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 23:55:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 23:55:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 23:55:35,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 23:55:35,446 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 23:55:35,448 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 23:55:35,866 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 23:55:35,870 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 23:55:35,871 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 23:55:35,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:55:35 BoogieIcfgContainer [2021-12-14 23:55:35,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 23:55:35,876 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-14 23:55:35,877 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-14 23:55:35,882 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-14 23:55:35,883 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 23:55:35,883 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.12 11:55:34" (1/3) ... [2021-12-14 23:55:35,884 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@d7bdd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.12 11:55:35, skipping insertion in model container [2021-12-14 23:55:35,885 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 23:55:35,885 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:55:35" (2/3) ... [2021-12-14 23:55:35,885 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@d7bdd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.12 11:55:35, skipping insertion in model container [2021-12-14 23:55:35,886 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 23:55:35,886 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:55:35" (3/3) ... [2021-12-14 23:55:35,887 INFO L388 chiAutomizerObserver]: Analyzing ICFG tree_parent_ptr.i [2021-12-14 23:55:35,935 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-14 23:55:35,936 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-14 23:55:35,936 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-14 23:55:35,936 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-14 23:55:35,936 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-14 23:55:35,936 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-14 23:55:35,936 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-14 23:55:35,936 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-14 23:55:35,952 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 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) [2021-12-14 23:55:35,965 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2021-12-14 23:55:35,966 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:55:35,966 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:55:35,971 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-14 23:55:35,971 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-14 23:55:35,971 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-14 23:55:35,971 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 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) [2021-12-14 23:55:35,973 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2021-12-14 23:55:35,973 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:55:35,974 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:55:35,974 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-14 23:55:35,974 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-14 23:55:35,980 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2); 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~malloc19#1.base, main_#t~malloc19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~nondet4#1, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(12);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 8 + main_~root~0#1.offset, 4); 14#L552-2true [2021-12-14 23:55:35,980 INFO L793 eck$LassoCheckResult]: Loop: 14#L552-2true assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 22#L541-2true assume !true; 7#L540-5true call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 6#L546true assume (main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;call main_#t~malloc13#1.base, main_#t~malloc13#1.offset := #Ultimate.allocOnHeap(12);call write~$Pointer$(main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc13#1.base, main_#t~malloc13#1.offset;call main_#t~mem14#1.base, main_#t~mem14#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem14#1.base, main_#t~mem14#1.offset, 4);havoc main_#t~mem14#1.base, main_#t~mem14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem15#1.base, 4 + main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset;call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, main_#t~mem16#1.base, 8 + main_#t~mem16#1.offset, 4);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset; 16#L546-2true call main_#t~mem17#1.base, main_#t~mem17#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 12#L552true assume !((main_#t~mem17#1.base == 0 && main_#t~mem17#1.offset == 0) && 0 != main_#t~nondet18#1);havoc main_#t~mem17#1.base, main_#t~mem17#1.offset;havoc main_#t~nondet18#1; 14#L552-2true [2021-12-14 23:55:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:35,985 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-14 23:55:35,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:35,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476092284] [2021-12-14 23:55:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:35,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:36,104 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:55:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:36,157 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:55:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2021-12-14 23:55:36,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:36,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206635369] [2021-12-14 23:55:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:36,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:55:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:55:36,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:55:36,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206635369] [2021-12-14 23:55:36,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206635369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:55:36,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:55:36,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 23:55:36,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890863857] [2021-12-14 23:55:36,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:55:36,338 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:55:36,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:55:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 23:55:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 23:55:36,371 INFO L87 Difference]: Start difference. First operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-14 23:55:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:55:36,378 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2021-12-14 23:55:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 23:55:36,382 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 29 transitions. [2021-12-14 23:55:36,384 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2021-12-14 23:55:36,388 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 17 states and 25 transitions. [2021-12-14 23:55:36,388 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-12-14 23:55:36,388 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-12-14 23:55:36,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 25 transitions. [2021-12-14 23:55:36,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:55:36,389 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-12-14 23:55:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 25 transitions. [2021-12-14 23:55:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-14 23:55:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 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) [2021-12-14 23:55:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2021-12-14 23:55:36,411 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-12-14 23:55:36,412 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-12-14 23:55:36,412 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-14 23:55:36,412 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 25 transitions. [2021-12-14 23:55:36,414 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2021-12-14 23:55:36,415 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:55:36,415 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:55:36,416 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-14 23:55:36,416 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:55:36,416 INFO L791 eck$LassoCheckResult]: Stem: 52#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2); 53#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~malloc19#1.base, main_#t~malloc19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~nondet4#1, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(12);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 8 + main_~root~0#1.offset, 4); 61#L552-2 [2021-12-14 23:55:36,417 INFO L793 eck$LassoCheckResult]: Loop: 61#L552-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 64#L541-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 50#L540-1 assume main_#t~short7#1;call main_#t~mem6#1.base, main_#t~mem6#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem6#1.base != 0 || main_#t~mem6#1.offset != 0; 51#L540-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 56#L540-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 54#L546 assume (main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;call main_#t~malloc13#1.base, main_#t~malloc13#1.offset := #Ultimate.allocOnHeap(12);call write~$Pointer$(main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc13#1.base, main_#t~malloc13#1.offset;call main_#t~mem14#1.base, main_#t~mem14#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem14#1.base, main_#t~mem14#1.offset, 4);havoc main_#t~mem14#1.base, main_#t~mem14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem15#1.base, 4 + main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset;call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, main_#t~mem16#1.base, 8 + main_#t~mem16#1.offset, 4);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset; 55#L546-2 call main_#t~mem17#1.base, main_#t~mem17#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 62#L552 assume !((main_#t~mem17#1.base == 0 && main_#t~mem17#1.offset == 0) && 0 != main_#t~nondet18#1);havoc main_#t~mem17#1.base, main_#t~mem17#1.offset;havoc main_#t~nondet18#1; 61#L552-2 [2021-12-14 23:55:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:36,418 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-12-14 23:55:36,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:36,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847031296] [2021-12-14 23:55:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:36,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:36,454 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:55:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:36,476 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:55:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2021-12-14 23:55:36,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:36,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174848661] [2021-12-14 23:55:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:36,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:55:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:55:36,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:55:36,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174848661] [2021-12-14 23:55:36,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174848661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:55:36,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:55:36,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 23:55:36,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125657028] [2021-12-14 23:55:36,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:55:36,772 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:55:36,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:55:36,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 23:55:36,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 23:55:36,773 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. cyclomatic complexity: 10 Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-12-14 23:55:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:55:36,882 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-12-14 23:55:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 23:55:36,883 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 35 transitions. [2021-12-14 23:55:36,884 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-12-14 23:55:36,885 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 35 transitions. [2021-12-14 23:55:36,885 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2021-12-14 23:55:36,886 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2021-12-14 23:55:36,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2021-12-14 23:55:36,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:55:36,886 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-12-14 23:55:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2021-12-14 23:55:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-12-14 23:55:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 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) [2021-12-14 23:55:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2021-12-14 23:55:36,889 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2021-12-14 23:55:36,889 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2021-12-14 23:55:36,889 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-14 23:55:36,889 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 29 transitions. [2021-12-14 23:55:36,890 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2021-12-14 23:55:36,890 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:55:36,890 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:55:36,890 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-14 23:55:36,890 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:55:36,891 INFO L791 eck$LassoCheckResult]: Stem: 104#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2); 105#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~malloc19#1.base, main_#t~malloc19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~nondet4#1, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(12);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 8 + main_~root~0#1.offset, 4); 111#L552-2 [2021-12-14 23:55:36,891 INFO L793 eck$LassoCheckResult]: Loop: 111#L552-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 116#L541-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 101#L540-1 assume main_#t~short7#1;call main_#t~mem6#1.base, main_#t~mem6#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem6#1.base != 0 || main_#t~mem6#1.offset != 0; 102#L540-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 108#L540-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 106#L546 assume !((main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1);havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1; 107#L546-2 call main_#t~mem17#1.base, main_#t~mem17#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 114#L552 assume !((main_#t~mem17#1.base == 0 && main_#t~mem17#1.offset == 0) && 0 != main_#t~nondet18#1);havoc main_#t~mem17#1.base, main_#t~mem17#1.offset;havoc main_#t~nondet18#1; 111#L552-2 [2021-12-14 23:55:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:36,891 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2021-12-14 23:55:36,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:36,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675513397] [2021-12-14 23:55:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:36,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:36,903 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:55:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:36,911 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:55:36,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2021-12-14 23:55:36,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:36,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844843151] [2021-12-14 23:55:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:36,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:36,920 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:55:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:36,927 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:55:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2021-12-14 23:55:36,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568923909] [2021-12-14 23:55:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:36,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:55:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:55:36,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:55:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568923909] [2021-12-14 23:55:36,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568923909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:55:36,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:55:36,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 23:55:36,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212829845] [2021-12-14 23:55:36,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:55:37,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:55:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 23:55:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 23:55:37,176 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. cyclomatic complexity: 11 Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-14 23:55:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:55:37,360 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2021-12-14 23:55:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 23:55:37,361 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 46 transitions. [2021-12-14 23:55:37,362 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2021-12-14 23:55:37,363 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 46 transitions. [2021-12-14 23:55:37,363 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-12-14 23:55:37,363 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2021-12-14 23:55:37,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 46 transitions. [2021-12-14 23:55:37,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:55:37,364 INFO L681 BuchiCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-12-14 23:55:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 46 transitions. [2021-12-14 23:55:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-12-14 23:55:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 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) [2021-12-14 23:55:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-12-14 23:55:37,366 INFO L704 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-12-14 23:55:37,366 INFO L587 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-12-14 23:55:37,367 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-14 23:55:37,367 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 39 transitions. [2021-12-14 23:55:37,367 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2021-12-14 23:55:37,367 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:55:37,367 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:55:37,368 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-14 23:55:37,368 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:55:37,368 INFO L791 eck$LassoCheckResult]: Stem: 170#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2); 171#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~malloc19#1.base, main_#t~malloc19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~nondet4#1, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(12);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 8 + main_~root~0#1.offset, 4); 177#L552-2 [2021-12-14 23:55:37,368 INFO L793 eck$LassoCheckResult]: Loop: 177#L552-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 184#L541-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 168#L540-1 assume !main_#t~short7#1; 169#L540-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 195#L540-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 193#L546 assume !((main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1);havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1; 185#L546-2 call main_#t~mem17#1.base, main_#t~mem17#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 181#L552 assume !((main_#t~mem17#1.base == 0 && main_#t~mem17#1.offset == 0) && 0 != main_#t~nondet18#1);havoc main_#t~mem17#1.base, main_#t~mem17#1.offset;havoc main_#t~nondet18#1; 177#L552-2 [2021-12-14 23:55:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2021-12-14 23:55:37,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:37,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455834191] [2021-12-14 23:55:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:37,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:37,378 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:55:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:37,386 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:55:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2021-12-14 23:55:37,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097632376] [2021-12-14 23:55:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:37,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:37,408 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:55:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:37,414 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:55:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:55:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2021-12-14 23:55:37,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:55:37,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629700989] [2021-12-14 23:55:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:55:37,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:55:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:37,427 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:55:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:55:37,439 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:55:38,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.12 11:55:38 BoogieIcfgContainer [2021-12-14 23:55:38,038 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-14 23:55:38,038 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 23:55:38,039 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 23:55:38,039 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 23:55:38,039 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:55:35" (3/4) ... [2021-12-14 23:55:38,041 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-14 23:55:38,065 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 23:55:38,066 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 23:55:38,067 INFO L158 Benchmark]: Toolchain (without parser) took 3689.21ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 59.4MB in the beginning and 41.0MB in the end (delta: 18.4MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. [2021-12-14 23:55:38,067 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 92.3MB. Free memory was 49.5MB in the beginning and 49.4MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 23:55:38,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 651.73ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 59.1MB in the beginning and 80.8MB in the end (delta: -21.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 23:55:38,068 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.55ms. Allocated memory is still 111.1MB. Free memory was 80.4MB in the beginning and 78.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 23:55:38,069 INFO L158 Benchmark]: Boogie Preprocessor took 59.87ms. Allocated memory is still 111.1MB. Free memory was 78.3MB in the beginning and 76.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 23:55:38,069 INFO L158 Benchmark]: RCFGBuilder took 709.16ms. Allocated memory is still 111.1MB. Free memory was 76.5MB in the beginning and 51.4MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-12-14 23:55:38,070 INFO L158 Benchmark]: BuchiAutomizer took 2161.56ms. Allocated memory is still 111.1MB. Free memory was 51.4MB in the beginning and 43.0MB in the end (delta: 8.4MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2021-12-14 23:55:38,070 INFO L158 Benchmark]: Witness Printer took 27.39ms. Allocated memory is still 111.1MB. Free memory was 42.2MB in the beginning and 41.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 23:55:38,073 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 92.3MB. Free memory was 49.5MB in the beginning and 49.4MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 651.73ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 59.1MB in the beginning and 80.8MB in the end (delta: -21.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.55ms. Allocated memory is still 111.1MB. Free memory was 80.4MB in the beginning and 78.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.87ms. Allocated memory is still 111.1MB. Free memory was 78.3MB in the beginning and 76.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 709.16ms. Allocated memory is still 111.1MB. Free memory was 76.5MB in the beginning and 51.4MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * BuchiAutomizer took 2161.56ms. Allocated memory is still 111.1MB. Free memory was 51.4MB in the beginning and 43.0MB in the end (delta: 8.4MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. * Witness Printer took 27.39ms. Allocated memory is still 111.1MB. Free memory was 42.2MB in the beginning and 41.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (3 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.3 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.0s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.6s. Construction of modules took 0.2s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 3. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 128 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 60 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 100 IncrementalHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 68 mSDtfsCounter, 100 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT0 conc1 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 538]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@10b1c9eb=0, NULL=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4582988c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6289848b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3dda0bce=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@31b05cbd=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@630454f8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1deb9ac5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7aa027cd=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@630454f8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@268b8e74=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3dda0bce=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@17ce6b9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@147191cb=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2136dbf4=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@175fe003=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7313cda=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2e90a966=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@147191cb=0, NULL=0, n=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1deb9ac5=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@175fe003=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3e982723=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7e122544=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3e982723=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@35d97c4a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2136dbf4=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@268b8e74=0, n=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1f0d865c=0, root=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2f9546b2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@6d94ee7a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@214626a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@10b1c9eb=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7aa027cd=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@214626a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4582988c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@577b9929=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@422c7332=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7313cda=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7e122544=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5cbe0b33=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6289848b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@35d97c4a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2e90a966=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1f0d865c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@422c7332=0, root=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3f1fc6c9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@17ce6b9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2f9546b2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@45ef4677=23, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@31b05cbd=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1a988344=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@577b9929=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5cbe0b33=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7b1115cf=0, s=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 538]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L534] struct TreeNode* root = malloc(sizeof(*root)), *n; [L534] struct TreeNode* root = malloc(sizeof(*root)), *n; [L535] root->left = ((void *)0) [L536] root->right = ((void *)0) [L537] root->parent = ((void *)0) Loop: [L538] COND TRUE __VERIFIER_nondet_int() [L539] n = root [L540] EXPR n->left [L540] n->left && n->right [L540] COND FALSE !(n->left && n->right) [L546] EXPR n->left [L546] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L552] EXPR n->right [L552] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-12-14 23:55:38,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)