./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-simple-white-blue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/forester-heap/dll-simple-white-blue-1.i -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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f369e67185304fce6130a1dfc66e8cb89abf0605 ................................................................................................................................................................................................................................................................................... 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 0.1.24-30f4e4a [2019-11-27 23:54:18,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:54:18,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:54:18,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:54:18,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:54:18,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:54:18,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:54:18,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:54:18,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:54:18,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:54:18,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:54:18,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:54:18,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:54:18,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:54:18,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:54:18,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:54:18,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:54:18,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:54:18,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:54:18,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:54:18,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:54:18,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:54:18,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:54:18,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:54:18,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:54:18,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:54:18,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:54:18,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:54:18,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:54:18,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:54:18,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:54:18,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:54:18,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:54:18,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:54:18,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:54:18,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:54:18,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:54:18,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:54:18,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:54:18,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:54:18,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:54:18,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:54:18,119 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:54:18,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:54:18,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:54:18,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:54:18,123 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:54:18,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:54:18,123 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:54:18,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:54:18,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:54:18,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:54:18,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:54:18,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:54:18,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:54:18,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:54:18,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:54:18,127 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:54:18,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:54:18,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:54:18,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:54:18,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:54:18,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:54:18,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:54:18,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:54:18,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:54:18,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:54:18,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:54:18,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:54:18,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:54:18,131 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(__VERIFIER_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 -> f369e67185304fce6130a1dfc66e8cb89abf0605 [2019-11-27 23:54:18,430 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:54:18,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:54:18,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:54:18,448 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:54:18,448 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:54:18,449 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-simple-white-blue-1.i [2019-11-27 23:54:18,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7468ebc/5c4bcd6b9fbf426999700e666cc3e88d/FLAG73cbd7fa6 [2019-11-27 23:54:19,023 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:54:19,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-simple-white-blue-1.i [2019-11-27 23:54:19,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7468ebc/5c4bcd6b9fbf426999700e666cc3e88d/FLAG73cbd7fa6 [2019-11-27 23:54:19,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7468ebc/5c4bcd6b9fbf426999700e666cc3e88d [2019-11-27 23:54:19,332 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:54:19,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:54:19,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:54:19,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:54:19,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:54:19,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:19,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f677360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19, skipping insertion in model container [2019-11-27 23:54:19,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:19,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:54:19,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:54:19,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:54:19,824 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:54:19,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:54:19,929 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:54:19,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19 WrapperNode [2019-11-27 23:54:19,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:54:19,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:54:19,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:54:19,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:54:19,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:19,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:19,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:54:19,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:54:19,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:54:19,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:54:19,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:19,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:20,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:20,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:20,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:20,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:20,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (1/1) ... [2019-11-27 23:54:20,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:54:20,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:54:20,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:54:20,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:54:20,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (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 [2019-11-27 23:54:20,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:54:20,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 23:54:20,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 23:54:20,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-27 23:54:20,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-27 23:54:20,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:54:20,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:54:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:54:20,586 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:54:20,586 INFO L297 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-27 23:54:20,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:54:20 BoogieIcfgContainer [2019-11-27 23:54:20,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:54:20,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:54:20,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:54:20,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:54:20,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:54:19" (1/3) ... [2019-11-27 23:54:20,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755a88cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:54:20, skipping insertion in model container [2019-11-27 23:54:20,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:54:19" (2/3) ... [2019-11-27 23:54:20,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755a88cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:54:20, skipping insertion in model container [2019-11-27 23:54:20,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:54:20" (3/3) ... [2019-11-27 23:54:20,597 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-1.i [2019-11-27 23:54:20,607 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:54:20,614 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:54:20,624 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:54:20,644 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:54:20,644 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:54:20,644 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:54:20,644 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:54:20,644 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:54:20,645 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:54:20,645 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:54:20,645 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:54:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-27 23:54:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-27 23:54:20,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:54:20,665 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:54:20,665 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:54:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:54:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash -893663255, now seen corresponding path program 1 times [2019-11-27 23:54:20,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:54:20,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661272798] [2019-11-27 23:54:20,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:54:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:54:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:54:20,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661272798] [2019-11-27 23:54:20,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:54:20,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:54:20,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909417820] [2019-11-27 23:54:20,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:54:20,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:54:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:54:20,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:54:20,844 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-11-27 23:54:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:54:20,865 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2019-11-27 23:54:20,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:54:20,867 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-27 23:54:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:54:20,881 INFO L225 Difference]: With dead ends: 49 [2019-11-27 23:54:20,881 INFO L226 Difference]: Without dead ends: 20 [2019-11-27 23:54:20,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:54:20,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-27 23:54:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-27 23:54:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-27 23:54:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2019-11-27 23:54:20,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2019-11-27 23:54:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:54:20,928 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2019-11-27 23:54:20,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:54:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2019-11-27 23:54:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-27 23:54:20,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:54:20,930 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:54:20,931 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:54:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:54:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1702731784, now seen corresponding path program 1 times [2019-11-27 23:54:20,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:54:20,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712915241] [2019-11-27 23:54:20,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:54:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:54:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:54:21,077 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:54:21,078 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:54:21,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:54:21 BoogieIcfgContainer [2019-11-27 23:54:21,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:54:21,109 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:54:21,109 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:54:21,110 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:54:21,110 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:54:20" (3/4) ... [2019-11-27 23:54:21,112 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:54:21,165 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:54:21,165 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:54:21,167 INFO L168 Benchmark]: Toolchain (without parser) took 1833.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -102.9 MB). Peak memory consumption was 45.0 MB. Max. memory is 11.5 GB. [2019-11-27 23:54:21,168 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:54:21,169 INFO L168 Benchmark]: CACSL2BoogieTranslator took 596.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 956.3 MB in the beginning and 1.1 GB in the end (delta: -173.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:54:21,170 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:54:21,170 INFO L168 Benchmark]: Boogie Preprocessor took 37.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:54:21,171 INFO L168 Benchmark]: RCFGBuilder took 562.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:54:21,172 INFO L168 Benchmark]: TraceAbstraction took 519.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2019-11-27 23:54:21,172 INFO L168 Benchmark]: Witness Printer took 56.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:54:21,176 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 596.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 956.3 MB in the beginning and 1.1 GB in the end (delta: -173.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 57.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 562.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 519.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * Witness Printer took 56.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1052]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L989] SLL* head = malloc(sizeof(SLL)); [L990] head->next = ((void*)0) [L991] head->prev = ((void*)0) [L992] head->data = 0 [L994] SLL* x = head; [L997] COND FALSE !(__VERIFIER_nondet_int()) [L1008] COND TRUE __VERIFIER_nondet_int() [L1009] x = malloc(sizeof(SLL)) [L1010] x->data = 1 [L1011] x->next = head [L1012] x->prev = ((void*)0) [L1013] head = x [L1039] x = head [L1042] EXPR x->data [L1042] COND FALSE !(x->data != 1) [L1048] EXPR x->next [L1048] x = x->next [L1049] COND TRUE \read(*x) [L1051] EXPR x->data [L1051] COND TRUE x->data != 1 [L1052] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...