./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-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/list-ext2-properties/simple_and_skiplist_2lvl-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 6a10fd260c2f708e346588150444ddfe9656de05 ...................................................................................................................................................................................................................................................................................................................................................................................... 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 23:55:31,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:55:31,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:55:31,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:55:31,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:55:31,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:55:31,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:55:31,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:55:31,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:55:31,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:55:31,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:55:31,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:55:31,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:55:31,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:55:31,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:55:31,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:55:31,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:55:31,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:55:31,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:55:31,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:55:31,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:55:31,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:55:31,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:55:31,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:55:31,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:55:31,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:55:31,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:55:31,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:55:31,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:55:31,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:55:31,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:55:31,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:55:31,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:55:31,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:55:31,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:55:31,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:55:31,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:55:31,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:55:31,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:55:31,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:55:31,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:55:31,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:55:31,962 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:55:31,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:55:31,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:55:31,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:55:31,964 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:55:31,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:55:31,970 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:55:31,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:55:31,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:55:31,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:55:31,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:55:31,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:55:31,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:55:31,973 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:55:31,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:55:31,974 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:55:31,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:55:31,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:55:31,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:55:31,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:55:31,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:55:31,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:55:31,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:55:31,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:55:31,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:55:31,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:55:31,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:55:31,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:55:31,982 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 -> 6a10fd260c2f708e346588150444ddfe9656de05 [2019-11-27 23:55:32,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:55:32,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:55:32,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:55:32,308 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:55:32,309 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:55:32,310 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2019-11-27 23:55:32,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/991aa28ec/c886fe2e7b004e1bb321888f48eab231/FLAGfa9f822c6 [2019-11-27 23:55:32,905 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:55:32,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2019-11-27 23:55:32,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/991aa28ec/c886fe2e7b004e1bb321888f48eab231/FLAGfa9f822c6 [2019-11-27 23:55:33,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/991aa28ec/c886fe2e7b004e1bb321888f48eab231 [2019-11-27 23:55:33,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:55:33,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:55:33,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:55:33,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:55:33,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:55:33,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5438bd97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33, skipping insertion in model container [2019-11-27 23:55:33,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:55:33,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:55:33,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:55:33,729 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:55:33,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:55:33,854 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:55:33,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33 WrapperNode [2019-11-27 23:55:33,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:55:33,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:55:33,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:55:33,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:55:33,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:55:33,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:55:33,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:55:33,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:55:33,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (1/1) ... [2019-11-27 23:55:33,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:55:33,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:55:33,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:55:33,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:55:33,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (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 23:55:34,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:55:34,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 23:55:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 23:55:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-27 23:55:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-27 23:55:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:55:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:55:34,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:55:34,604 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:55:34,604 INFO L297 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-27 23:55:34,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:34 BoogieIcfgContainer [2019-11-27 23:55:34,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:55:34,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:55:34,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:55:34,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:55:34,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:55:33" (1/3) ... [2019-11-27 23:55:34,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4079e536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:55:34, skipping insertion in model container [2019-11-27 23:55:34,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:33" (2/3) ... [2019-11-27 23:55:34,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4079e536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:55:34, skipping insertion in model container [2019-11-27 23:55:34,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:34" (3/3) ... [2019-11-27 23:55:34,614 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2019-11-27 23:55:34,624 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:55:34,631 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:55:34,641 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:55:34,664 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:55:34,665 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:55:34,665 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:55:34,665 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:55:34,666 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:55:34,666 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:55:34,666 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:55:34,666 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:55:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-27 23:55:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 23:55:34,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:34,690 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:55:34,690 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:34,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2114193284, now seen corresponding path program 1 times [2019-11-27 23:55:34,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:34,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100556731] [2019-11-27 23:55:34,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:55:34,839 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 23:55:34,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100556731] [2019-11-27 23:55:34,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:55:34,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:55:34,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366997913] [2019-11-27 23:55:34,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:55:34,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:55:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:55:34,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:55:34,859 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-11-27 23:55:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:55:34,880 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2019-11-27 23:55:34,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:55:34,881 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-27 23:55:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:55:34,890 INFO L225 Difference]: With dead ends: 64 [2019-11-27 23:55:34,890 INFO L226 Difference]: Without dead ends: 14 [2019-11-27 23:55:34,894 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 23:55:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-27 23:55:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-27 23:55:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-27 23:55:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-27 23:55:34,923 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-27 23:55:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:55:34,924 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-27 23:55:34,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:55:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-27 23:55:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 23:55:34,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:34,925 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:55:34,925 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:34,926 INFO L82 PathProgramCache]: Analyzing trace with hash 672844787, now seen corresponding path program 1 times [2019-11-27 23:55:34,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:34,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266216318] [2019-11-27 23:55:34,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:55:35,031 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 23:55:35,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266216318] [2019-11-27 23:55:35,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:55:35,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-27 23:55:35,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584362585] [2019-11-27 23:55:35,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 23:55:35,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:55:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 23:55:35,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:55:35,035 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-27 23:55:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:55:35,147 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-27 23:55:35,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 23:55:35,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-27 23:55:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:55:35,149 INFO L225 Difference]: With dead ends: 29 [2019-11-27 23:55:35,150 INFO L226 Difference]: Without dead ends: 27 [2019-11-27 23:55:35,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-27 23:55:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-27 23:55:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2019-11-27 23:55:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-27 23:55:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-27 23:55:35,157 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2019-11-27 23:55:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:55:35,157 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-27 23:55:35,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 23:55:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-27 23:55:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-27 23:55:35,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:35,159 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:55:35,159 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:35,159 INFO L82 PathProgramCache]: Analyzing trace with hash 111486456, now seen corresponding path program 1 times [2019-11-27 23:55:35,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:35,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540217550] [2019-11-27 23:55:35,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:55:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:55:35,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540217550] [2019-11-27 23:55:35,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476707199] [2019-11-27 23:55:35,370 INFO L94 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 [2019-11-27 23:55:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:55:35,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-27 23:55:35,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:55:35,552 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-27 23:55:35,553 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 23:55:35,562 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 23:55:35,568 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-27 23:55:35,568 INFO L508 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-27 23:55:35,579 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 23:55:35,580 INFO L508 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 23:55:35,580 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-27 23:55:35,599 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-27 23:55:35,600 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 23:55:35,608 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 23:55:35,611 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-27 23:55:35,612 INFO L508 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-27 23:55:35,617 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 23:55:35,618 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 23:55:35,618 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-27 23:55:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:55:35,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:55:35,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-27 23:55:35,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975786371] [2019-11-27 23:55:35,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-27 23:55:35,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:55:35,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-27 23:55:35,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-27 23:55:35,624 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-11-27 23:55:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:55:35,718 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-27 23:55:35,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-27 23:55:35,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-27 23:55:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:55:35,719 INFO L225 Difference]: With dead ends: 33 [2019-11-27 23:55:35,720 INFO L226 Difference]: Without dead ends: 23 [2019-11-27 23:55:35,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-27 23:55:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-27 23:55:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2019-11-27 23:55:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-27 23:55:35,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-27 23:55:35,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-27 23:55:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:55:35,725 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-27 23:55:35,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-27 23:55:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-27 23:55:35,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-27 23:55:35,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:35,726 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:55:35,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:55:35,937 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1682540518, now seen corresponding path program 1 times [2019-11-27 23:55:35,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:35,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557840671] [2019-11-27 23:55:35,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:55:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:55:36,048 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:55:36,049 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:55:36,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:55:36 BoogieIcfgContainer [2019-11-27 23:55:36,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:55:36,102 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:55:36,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:55:36,103 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:55:36,103 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:34" (3/4) ... [2019-11-27 23:55:36,106 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:55:36,167 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:55:36,168 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:55:36,170 INFO L168 Benchmark]: Toolchain (without parser) took 2939.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 952.3 MB in the beginning and 962.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 110.4 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:36,170 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:55:36,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 625.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -153.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:36,171 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.10 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:36,172 INFO L168 Benchmark]: Boogie Preprocessor took 36.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:55:36,173 INFO L168 Benchmark]: RCFGBuilder took 642.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.3 MB). Peak memory consumption was 38.3 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:36,173 INFO L168 Benchmark]: TraceAbstraction took 1494.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 968.8 MB in the end (delta: 86.9 MB). Peak memory consumption was 86.9 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:36,174 INFO L168 Benchmark]: Witness Printer took 65.56 ms. Allocated memory is still 1.1 GB. Free memory was 968.8 MB in the beginning and 962.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:36,177 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 625.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -153.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 69.10 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 36.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 642.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.3 MB). Peak memory consumption was 38.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1494.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 968.8 MB in the end (delta: 86.9 MB). Peak memory consumption was 86.9 MB. Max. memory is 11.5 GB. * Witness Printer took 65.56 ms. Allocated memory is still 1.1 GB. Free memory was 968.8 MB in the beginning and 962.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); [L586] COND FALSE !(a == 0) [L587] List t; [L588] List p = a; [L589] a->h = 2 [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) [L593] COND FALSE !(t == 0) [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a [L600] COND TRUE p!=0 [L601] EXPR p->h [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 30 SDslu, 48 SDs, 0 SdLazy, 58 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 3067 SizeOfPredicates, 7 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...