./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 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext.i -s /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan --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 Taipan --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 0.1.24-6b5699a [2019-11-26 02:21:27,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:21:27,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:21:27,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:21:27,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:21:27,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:21:27,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:21:27,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:21:27,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:21:27,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:21:27,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:21:27,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:21:27,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:21:27,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:21:27,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:21:27,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:21:27,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:21:27,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:21:27,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:21:27,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:21:27,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:21:27,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:21:27,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:21:27,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:21:27,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:21:27,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:21:27,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:21:27,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:21:27,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:21:27,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:21:27,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:21:27,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:21:27,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:21:27,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:21:27,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:21:27,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:21:27,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:21:27,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:21:27,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:21:27,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:21:27,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:21:27,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:21:27,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:21:27,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:21:27,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:21:27,607 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:21:27,607 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:21:27,607 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:21:27,607 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:21:27,608 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:21:27,608 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:21:27,608 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:21:27,608 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:21:27,608 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:21:27,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:21:27,609 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:21:27,609 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:21:27,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:21:27,610 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:21:27,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:21:27,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:21:27,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:21:27,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:21:27,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:21:27,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:21:27,611 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:21:27,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:21:27,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:21:27,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:21:27,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:21:27,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:21:27,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:21:27,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:21:27,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:21:27,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:21:27,613 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:21:27,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:21:27,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:21:27,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:21:27,613 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan 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 -> Taipan 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 [2019-11-26 02:21:27,746 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:21:27,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:21:27,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:21:27,760 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:21:27,761 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:21:27,761 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/list-ext.i [2019-11-26 02:21:27,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/data/5ff8e2e95/4de86cec8dc746ec944f0a531a9ca557/FLAGf378ac1ad [2019-11-26 02:21:28,286 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:21:28,287 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/sv-benchmarks/c/list-ext-properties/list-ext.i [2019-11-26 02:21:28,299 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/data/5ff8e2e95/4de86cec8dc746ec944f0a531a9ca557/FLAGf378ac1ad [2019-11-26 02:21:28,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/data/5ff8e2e95/4de86cec8dc746ec944f0a531a9ca557 [2019-11-26 02:21:28,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:21:28,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:21:28,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:21:28,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:21:28,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:21:28,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7265be6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28, skipping insertion in model container [2019-11-26 02:21:28,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:21:28,361 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:21:28,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:21:28,682 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:21:28,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:21:28,822 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:21:28,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28 WrapperNode [2019-11-26 02:21:28,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:21:28,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:21:28,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:21:28,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:21:28,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:21:28,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:21:28,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:21:28,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:21:28,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... [2019-11-26 02:21:28,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:21:28,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:21:28,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:21:28,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:21:28,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/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 [2019-11-26 02:21:28,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:21:28,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:21:28,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:21:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:21:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:21:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:21:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:21:28,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:21:29,384 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:21:29,384 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-26 02:21:29,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:21:29 BoogieIcfgContainer [2019-11-26 02:21:29,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:21:29,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:21:29,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:21:29,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:21:29,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:21:28" (1/3) ... [2019-11-26 02:21:29,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432711d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:21:29, skipping insertion in model container [2019-11-26 02:21:29,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:28" (2/3) ... [2019-11-26 02:21:29,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432711d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:21:29, skipping insertion in model container [2019-11-26 02:21:29,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:21:29" (3/3) ... [2019-11-26 02:21:29,392 INFO L109 eAbstractionObserver]: Analyzing ICFG list-ext.i [2019-11-26 02:21:29,401 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:21:29,406 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:21:29,415 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:21:29,435 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:21:29,435 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:21:29,435 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:21:29,436 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:21:29,436 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:21:29,436 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:21:29,436 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:21:29,436 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:21:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-26 02:21:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:21:29,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:21:29,456 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:21:29,456 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:21:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:21:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1375368883, now seen corresponding path program 1 times [2019-11-26 02:21:29,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:21:29,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977164982] [2019-11-26 02:21:29,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:21:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:21:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:21:29,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977164982] [2019-11-26 02:21:29,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:21:29,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:21:29,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175989666] [2019-11-26 02:21:29,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-26 02:21:29,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:21:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-26 02:21:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 02:21:29,593 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-26 02:21:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:21:29,607 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-11-26 02:21:29,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-26 02:21:29,608 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-26 02:21:29,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:21:29,617 INFO L225 Difference]: With dead ends: 43 [2019-11-26 02:21:29,617 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:21:29,620 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 [2019-11-26 02:21:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:21:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:21:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:21:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-26 02:21:29,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2019-11-26 02:21:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:21:29,651 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-26 02:21:29,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-26 02:21:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-26 02:21:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:21:29,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:21:29,653 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:21:29,653 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:21:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:21:29,653 INFO L82 PathProgramCache]: Analyzing trace with hash 264524161, now seen corresponding path program 1 times [2019-11-26 02:21:29,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:21:29,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267099271] [2019-11-26 02:21:29,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:21:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:21:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:21:29,755 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:21:29,755 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:21:29,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:21:29 BoogieIcfgContainer [2019-11-26 02:21:29,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:21:29,783 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:21:29,783 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:21:29,783 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:21:29,784 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:21:29" (3/4) ... [2019-11-26 02:21:29,785 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:21:29,825 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_444f5bf6-f84d-4cc7-a5fa-1a88c9b493a6/bin/utaipan/witness.graphml [2019-11-26 02:21:29,825 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:21:29,827 INFO L168 Benchmark]: Toolchain (without parser) took 1513.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 939.3 MB in the beginning and 1.0 GB in the end (delta: -104.5 MB). Peak memory consumption was 36.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:29,827 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:21:29,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 509.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:29,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.93 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. [2019-11-26 02:21:29,829 INFO L168 Benchmark]: Boogie Preprocessor took 28.71 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. [2019-11-26 02:21:29,829 INFO L168 Benchmark]: RCFGBuilder took 485.76 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: 36.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:29,830 INFO L168 Benchmark]: TraceAbstraction took 396.22 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:29,830 INFO L168 Benchmark]: Witness Printer took 42.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:29,833 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 509.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 46.93 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 28.71 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 485.76 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: 36.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 396.22 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * Witness Printer took 42.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. 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, 25 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 32 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=25occurred 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, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 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...