./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext-properties/list-ext.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-ext-properties/list-ext.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 a3eaec471f51d4269ee2125af75884a2ba8bd8fa ..................................................................................................................................................................................................................................................................................... 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 23:55:26,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:55:26,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:55:26,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:55:26,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:55:26,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:55:26,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:55:26,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:55:26,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:55:26,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:55:26,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:55:26,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:55:26,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:55:26,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:55:26,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:55:26,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:55:26,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:55:26,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:55:26,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:55:26,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:55:26,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:55:26,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:55:26,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:55:26,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:55:26,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:55:26,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:55:26,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:55:26,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:55:26,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:55:26,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:55:26,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:55:26,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:55:26,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:55:26,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:55:26,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:55:26,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:55:26,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:55:26,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:55:26,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:55:26,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:55:26,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:55:26,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:55:26,512 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:55:26,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:55:26,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:55:26,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:55:26,515 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:55:26,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:55:26,516 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:55:26,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:55:26,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:55:26,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:55:26,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:55:26,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:55:26,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:55:26,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:55:26,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:55:26,518 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:55:26,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:55:26,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:55:26,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:55:26,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:55:26,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:55:26,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:55:26,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:55:26,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:55:26,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:55:26,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:55:26,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:55:26,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:55:26,522 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 -> a3eaec471f51d4269ee2125af75884a2ba8bd8fa [2019-11-27 23:55:26,840 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:55:26,853 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:55:26,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:55:26,858 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:55:26,859 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:55:26,860 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/list-ext.i [2019-11-27 23:55:26,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fe75c56f/432381285f9b4cedae7a116edff59579/FLAG387376656 [2019-11-27 23:55:27,548 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:55:27,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext.i [2019-11-27 23:55:27,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fe75c56f/432381285f9b4cedae7a116edff59579/FLAG387376656 [2019-11-27 23:55:27,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fe75c56f/432381285f9b4cedae7a116edff59579 [2019-11-27 23:55:27,824 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:55:27,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:55:27,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:55:27,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:55:27,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:55:27,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:55:27" (1/1) ... [2019-11-27 23:55:27,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c3aba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:27, skipping insertion in model container [2019-11-27 23:55:27,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:55:27" (1/1) ... [2019-11-27 23:55:27,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:55:27,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:55:28,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:55:28,366 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:55:28,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:55:28,502 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:55:28,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28 WrapperNode [2019-11-27 23:55:28,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:55:28,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:55:28,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:55:28,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:55:28,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:55:28,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:55:28,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:55:28,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:55:28,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (1/1) ... [2019-11-27 23:55:28,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:55:28,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:55:28,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:55:28,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:55:28,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (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 23:55:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:55:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 23:55:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 23:55:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-27 23:55:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-27 23:55:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:55:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:55:28,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:55:29,058 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:55:29,059 INFO L297 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-27 23:55:29,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:29 BoogieIcfgContainer [2019-11-27 23:55:29,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:55:29,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:55:29,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:55:29,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:55:29,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:55:27" (1/3) ... [2019-11-27 23:55:29,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9618a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:55:29, skipping insertion in model container [2019-11-27 23:55:29,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:28" (2/3) ... [2019-11-27 23:55:29,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9618a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:55:29, skipping insertion in model container [2019-11-27 23:55:29,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:29" (3/3) ... [2019-11-27 23:55:29,068 INFO L109 eAbstractionObserver]: Analyzing ICFG list-ext.i [2019-11-27 23:55:29,078 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:55:29,085 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:55:29,094 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:55:29,114 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:55:29,114 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:55:29,114 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:55:29,114 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:55:29,115 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:55:29,115 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:55:29,115 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:55:29,115 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:55:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-27 23:55:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-27 23:55:29,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:29,136 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:55:29,137 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:29,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1648325711, now seen corresponding path program 1 times [2019-11-27 23:55:29,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:29,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946354973] [2019-11-27 23:55:29,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:55:29,292 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 23:55:29,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946354973] [2019-11-27 23:55:29,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:55:29,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:55:29,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004082595] [2019-11-27 23:55:29,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:55:29,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:55:29,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:55:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:55:29,312 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-11-27 23:55:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:55:29,328 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2019-11-27 23:55:29,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:55:29,329 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-27 23:55:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:55:29,337 INFO L225 Difference]: With dead ends: 55 [2019-11-27 23:55:29,337 INFO L226 Difference]: Without dead ends: 23 [2019-11-27 23:55:29,340 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 23:55:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-27 23:55:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-27 23:55:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-27 23:55:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-27 23:55:29,371 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2019-11-27 23:55:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:55:29,372 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-27 23:55:29,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:55:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-27 23:55:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-27 23:55:29,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:29,373 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:55:29,373 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1013764981, now seen corresponding path program 1 times [2019-11-27 23:55:29,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:29,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20396953] [2019-11-27 23:55:29,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:55:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:55:29,476 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:55:29,476 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:55:29,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:55:29 BoogieIcfgContainer [2019-11-27 23:55:29,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:55:29,509 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:55:29,509 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:55:29,509 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:55:29,510 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:29" (3/4) ... [2019-11-27 23:55:29,512 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:55:29,559 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:55:29,559 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:55:29,562 INFO L168 Benchmark]: Toolchain (without parser) took 1734.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -117.7 MB). Peak memory consumption was 33.3 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:29,562 INFO L168 Benchmark]: CDTParser took 0.29 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 23:55:29,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 676.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -168.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:29,564 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.27 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 23:55:29,565 INFO L168 Benchmark]: Boogie Preprocessor took 33.61 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 23:55:29,566 INFO L168 Benchmark]: RCFGBuilder took 466.69 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: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:29,566 INFO L168 Benchmark]: TraceAbstraction took 447.11 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 23:55:29,567 INFO L168 Benchmark]: Witness Printer took 50.62 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 23:55:29,571 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 676.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -168.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 54.27 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. * Boogie Preprocessor took 33.61 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 466.69 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: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 447.11 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 50.62 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: 556]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int i = 0; [L522] int y = 0; [L523] List a = (List) malloc(sizeof(struct node)); [L524] COND FALSE !(a == 0) [L525] List t; [L526] List p = a; [L527] i < 10 && __VERIFIER_nondet_int() [L527] i < 10 && __VERIFIER_nondet_int() [L527] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L535] y < 10 && __VERIFIER_nondet_int() [L535] y < 10 && __VERIFIER_nondet_int() [L535] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L543] p->h = 3 [L544] i = 0 [L545] y = 0 [L546] p = a [L547] EXPR p->h [L547] COND FALSE !(p->h == 1) [L551] EXPR p->h [L551] COND FALSE !(p->h == 2) [L555] EXPR p->h [L555] COND TRUE p->h != 3 || (i + y) < 20 [L556] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 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=33occurred 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, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 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...