./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/tree_del_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:48:55,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:48:55,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:48:55,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:48:55,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:48:55,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:48:55,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:48:55,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:48:55,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:48:55,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:48:55,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:48:55,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:48:55,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:48:55,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:48:55,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:48:55,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:48:55,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:48:55,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:48:55,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:48:55,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:48:55,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:48:55,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:48:55,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:48:55,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:48:55,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:48:55,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:48:55,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:48:55,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:48:55,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:48:55,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:48:55,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:48:55,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:48:55,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:48:55,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:48:55,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:48:55,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:48:55,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:48:55,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:48:55,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:48:55,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:48:55,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:48:55,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:48:55,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:48:55,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:48:55,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:48:55,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:48:55,241 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:48:55,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:48:55,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:48:55,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:48:55,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:48:55,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:48:55,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:48:55,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:48:55,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:48:55,243 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:48:55,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:48:55,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:48:55,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:48:55,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:48:55,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:48:55,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:48:55,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:48:55,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:48:55,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:48:55,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:48:55,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:48:55,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:48:55,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:48:55,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:48:55,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:48:55,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 ! call(reach_error())) ) 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 -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2020-10-20 01:48:55,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:48:55,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:48:55,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:48:55,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:48:55,462 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:48:55,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2020-10-20 01:48:55,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddf8c2b41/8487031fdbb347dab7caee8adec9ab96/FLAGfa7a004ed [2020-10-20 01:48:56,079 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:48:56,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2020-10-20 01:48:56,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddf8c2b41/8487031fdbb347dab7caee8adec9ab96/FLAGfa7a004ed [2020-10-20 01:48:56,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddf8c2b41/8487031fdbb347dab7caee8adec9ab96 [2020-10-20 01:48:56,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:48:56,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:48:56,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:48:56,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:48:56,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:48:56,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170ea0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56, skipping insertion in model container [2020-10-20 01:48:56,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:48:56,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:48:56,738 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 01:48:56,740 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 01:48:56,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:48:56,772 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:48:56,791 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 01:48:56,793 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 01:48:56,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:48:56,827 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:48:56,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56 WrapperNode [2020-10-20 01:48:56,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:48:56,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:48:56,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:48:56,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:48:56,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:48:56,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:48:56,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:48:56,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:48:56,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... [2020-10-20 01:48:56,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:48:56,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:48:56,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:48:56,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:48:56,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:48:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 01:48:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:48:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-20 01:48:56,996 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-20 01:48:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 01:48:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-20 01:48:56,996 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-20 01:48:56,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 01:48:56,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 01:48:56,997 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-20 01:48:56,997 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-20 01:48:56,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:48:56,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 01:48:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-20 01:48:56,998 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-20 01:48:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:48:56,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:48:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-20 01:48:56,998 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-20 01:48:56,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 01:48:57,556 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:48:57,556 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-20 01:48:57,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:57 BoogieIcfgContainer [2020-10-20 01:48:57,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:48:57,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:48:57,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:48:57,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:48:57,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:48:56" (1/3) ... [2020-10-20 01:48:57,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bd4b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:48:57, skipping insertion in model container [2020-10-20 01:48:57,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:56" (2/3) ... [2020-10-20 01:48:57,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bd4b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:48:57, skipping insertion in model container [2020-10-20 01:48:57,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:57" (3/3) ... [2020-10-20 01:48:57,567 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-10-20 01:48:57,586 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:48:57,595 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-20 01:48:57,605 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-20 01:48:57,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:48:57,630 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:48:57,631 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:48:57,631 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:48:57,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:48:57,631 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:48:57,632 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:48:57,632 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:48:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-10-20 01:48:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 01:48:57,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:57,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:57,671 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:57,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1705108219, now seen corresponding path program 1 times [2020-10-20 01:48:57,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:57,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695784014] [2020-10-20 01:48:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:57,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 01:48:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-20 01:48:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 01:48:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:48:58,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695784014] [2020-10-20 01:48:58,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:48:58,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 01:48:58,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346644350] [2020-10-20 01:48:58,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:48:58,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:58,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:48:58,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:48:58,104 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 7 states. [2020-10-20 01:48:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:58,516 INFO L93 Difference]: Finished difference Result 152 states and 201 transitions. [2020-10-20 01:48:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:48:58,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-20 01:48:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:58,531 INFO L225 Difference]: With dead ends: 152 [2020-10-20 01:48:58,531 INFO L226 Difference]: Without dead ends: 84 [2020-10-20 01:48:58,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:48:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-20 01:48:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-10-20 01:48:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-20 01:48:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-10-20 01:48:58,605 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 30 [2020-10-20 01:48:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:58,606 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-10-20 01:48:58,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:48:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-10-20 01:48:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-20 01:48:58,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:58,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:58,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:48:58,612 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:58,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2043852858, now seen corresponding path program 1 times [2020-10-20 01:48:58,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:58,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398938592] [2020-10-20 01:48:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 01:48:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-20 01:48:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 01:48:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-20 01:48:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 01:48:58,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398938592] [2020-10-20 01:48:58,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587847551] [2020-10-20 01:48:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-20 01:48:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 01:48:59,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:59,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2020-10-20 01:48:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276929699] [2020-10-20 01:48:59,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:48:59,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:48:59,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:48:59,091 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 10 states. [2020-10-20 01:48:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:59,591 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2020-10-20 01:48:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:48:59,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-20 01:48:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:59,595 INFO L225 Difference]: With dead ends: 143 [2020-10-20 01:48:59,595 INFO L226 Difference]: Without dead ends: 84 [2020-10-20 01:48:59,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:48:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-20 01:48:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-20 01:48:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-20 01:48:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2020-10-20 01:48:59,613 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 42 [2020-10-20 01:48:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:59,613 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2020-10-20 01:48:59,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:48:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2020-10-20 01:48:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-20 01:48:59,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:59,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:59,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 01:48:59,830 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:59,831 INFO L82 PathProgramCache]: Analyzing trace with hash 130958985, now seen corresponding path program 1 times [2020-10-20 01:48:59,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:59,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535090465] [2020-10-20 01:48:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:59,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-20 01:49:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 01:49:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-20 01:49:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:49:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:49:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 01:49:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-20 01:49:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-20 01:49:00,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535090465] [2020-10-20 01:49:00,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:49:00,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-20 01:49:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482228779] [2020-10-20 01:49:00,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:49:00,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:49:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:49:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:49:00,169 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 10 states. [2020-10-20 01:49:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:49:00,625 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2020-10-20 01:49:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:49:00,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-20 01:49:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:49:00,630 INFO L225 Difference]: With dead ends: 143 [2020-10-20 01:49:00,630 INFO L226 Difference]: Without dead ends: 86 [2020-10-20 01:49:00,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:49:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-20 01:49:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-20 01:49:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-20 01:49:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-10-20 01:49:00,647 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 52 [2020-10-20 01:49:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:49:00,648 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-10-20 01:49:00,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:49:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-10-20 01:49:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-20 01:49:00,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:49:00,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:49:00,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 01:49:00,651 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:49:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:49:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash 748985290, now seen corresponding path program 1 times [2020-10-20 01:49:00,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:49:00,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026248648] [2020-10-20 01:49:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:49:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:49:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-20 01:49:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 01:49:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-20 01:49:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:49:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 01:49:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-20 01:49:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:49:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 01:49:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:00,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-20 01:49:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-20 01:49:01,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026248648] [2020-10-20 01:49:01,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253682712] [2020-10-20 01:49:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:49:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:01,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-20 01:49:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:49:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-20 01:49:01,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:49:01,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-20 01:49:01,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359977461] [2020-10-20 01:49:01,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:49:01,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:49:01,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:49:01,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:49:01,210 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 14 states. [2020-10-20 01:49:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:49:01,755 INFO L93 Difference]: Finished difference Result 136 states and 171 transitions. [2020-10-20 01:49:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 01:49:01,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-20 01:49:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:49:01,767 INFO L225 Difference]: With dead ends: 136 [2020-10-20 01:49:01,768 INFO L226 Difference]: Without dead ends: 86 [2020-10-20 01:49:01,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-20 01:49:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-20 01:49:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-20 01:49:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-20 01:49:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2020-10-20 01:49:01,784 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 65 [2020-10-20 01:49:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:49:01,785 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2020-10-20 01:49:01,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:49:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2020-10-20 01:49:01,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-20 01:49:01,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:49:01,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:49:02,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:49:02,001 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:49:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:49:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash -912424147, now seen corresponding path program 1 times [2020-10-20 01:49:02,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:49:02,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851538447] [2020-10-20 01:49:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:49:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:49:02,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:49:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:49:02,134 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:49:02,191 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 01:49:02,192 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 01:49:02,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 01:49:02,247 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,248 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,248 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,248 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,249 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,250 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,250 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,250 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,250 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,250 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,251 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,251 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:49:02 BoogieIcfgContainer [2020-10-20 01:49:02,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:49:02,326 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:49:02,326 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:49:02,326 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:49:02,327 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:57" (3/4) ... [2020-10-20 01:49:02,331 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 01:49:02,336 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,339 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,339 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,339 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,340 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,340 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,341 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,341 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,341 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,341 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,342 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,342 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-20 01:49:02,463 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:49:02,463 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:49:02,467 INFO L168 Benchmark]: Toolchain (without parser) took 5977.30 ms. Allocated memory was 41.9 MB in the beginning and 70.3 MB in the end (delta: 28.3 MB). Free memory was 21.2 MB in the beginning and 19.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:02,467 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 32.0 MB. Free memory was 11.0 MB in the beginning and 11.0 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 01:49:02,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.06 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 20.3 MB in the beginning and 18.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:02,469 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.20 ms. Allocated memory is still 42.5 MB. Free memory was 18.7 MB in the beginning and 16.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:02,469 INFO L168 Benchmark]: Boogie Preprocessor took 40.74 ms. Allocated memory is still 42.5 MB. Free memory was 16.6 MB in the beginning and 14.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:02,470 INFO L168 Benchmark]: RCFGBuilder took 634.21 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 14.4 MB in the beginning and 16.2 MB in the end (delta: -1.8 MB). Peak memory consumption was 6.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:02,471 INFO L168 Benchmark]: TraceAbstraction took 4766.25 ms. Allocated memory was 44.6 MB in the beginning and 70.3 MB in the end (delta: 25.7 MB). Free memory was 15.7 MB in the beginning and 26.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 14.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:02,478 INFO L168 Benchmark]: Witness Printer took 137.61 ms. Allocated memory is still 70.3 MB. Free memory was 26.7 MB in the beginning and 19.1 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:02,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 32.0 MB. Free memory was 11.0 MB in the beginning and 11.0 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 334.06 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 20.3 MB in the beginning and 18.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 54.20 ms. Allocated memory is still 42.5 MB. Free memory was 18.7 MB in the beginning and 16.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 40.74 ms. Allocated memory is still 42.5 MB. Free memory was 16.6 MB in the beginning and 14.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 634.21 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 14.4 MB in the beginning and 16.2 MB in the end (delta: -1.8 MB). Peak memory consumption was 6.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4766.25 ms. Allocated memory was 44.6 MB in the beginning and 70.3 MB in the end (delta: 25.7 MB). Free memory was 15.7 MB in the beginning and 26.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 14.6 MB. Max. memory is 14.3 GB. * Witness Printer took 137.61 ms. Allocated memory is still 70.3 MB. Free memory was 26.7 MB in the beginning and 19.1 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L102] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L102] RET nondet_tree() [L78] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) VAL [t={-1:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L74] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L9] COND FALSE !(!cond) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L84] RET tree_inorder(t, x, n) [L85] x[0] [L16] COND TRUE !cond [L14] __assert_fail("0", "tree_del_rec.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 87 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 316 SDtfs, 332 SDslu, 1413 SDs, 0 SdLazy, 1098 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 49914 SizeOfPredicates, 17 NumberOfNonLiveVariables, 593 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 103/111 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...