./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-circular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-circular-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/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 95b20088216028e3d05e3cb41d4ed5c20af6a751 ........................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 20:01:39,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 20:01:39,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 20:01:39,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 20:01:39,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 20:01:39,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 20:01:39,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 20:01:39,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 20:01:39,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 20:01:39,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 20:01:39,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 20:01:39,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 20:01:39,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 20:01:39,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 20:01:39,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 20:01:39,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 20:01:39,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 20:01:39,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 20:01:39,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 20:01:39,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 20:01:39,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 20:01:39,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 20:01:39,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 20:01:39,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 20:01:39,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 20:01:39,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 20:01:39,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 20:01:39,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 20:01:39,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 20:01:39,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 20:01:39,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 20:01:39,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 20:01:39,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 20:01:39,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 20:01:39,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 20:01:39,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 20:01:39,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 20:01:39,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 20:01:39,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 20:01:39,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 20:01:39,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 20:01:39,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 20:01:39,142 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 20:01:39,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 20:01:39,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 20:01:39,143 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 20:01:39,143 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 20:01:39,143 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 20:01:39,144 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 20:01:39,144 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 20:01:39,144 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 20:01:39,144 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 20:01:39,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 20:01:39,144 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 20:01:39,144 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 20:01:39,145 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 20:01:39,145 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 20:01:39,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 20:01:39,145 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 20:01:39,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 20:01:39,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 20:01:39,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 20:01:39,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 20:01:39,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 20:01:39,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 20:01:39,146 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 20:01:39,146 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 20:01:39,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 20:01:39,147 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 20:01:39,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 20:01:39,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 20:01:39,147 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 20:01:39,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 20:01:39,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 20:01:39,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 20:01:39,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 20:01:39,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 20:01:39,148 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 20:01:39,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 20:01:39,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 20:01:39,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 20:01:39,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 20:01:39,148 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_4d656d69-1369-4fd4-a1e6-a352d588460b/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 -> 95b20088216028e3d05e3cb41d4ed5c20af6a751 [2019-12-07 20:01:39,245 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 20:01:39,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 20:01:39,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 20:01:39,257 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 20:01:39,258 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 20:01:39,258 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/../../sv-benchmarks/c/forester-heap/dll-circular-1.i [2019-12-07 20:01:39,298 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/data/cd3a337e9/4daa196bb0ca435bb38aeb7450a3e5dd/FLAGe56bcd079 [2019-12-07 20:01:39,743 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 20:01:39,744 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/sv-benchmarks/c/forester-heap/dll-circular-1.i [2019-12-07 20:01:39,752 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/data/cd3a337e9/4daa196bb0ca435bb38aeb7450a3e5dd/FLAGe56bcd079 [2019-12-07 20:01:39,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/data/cd3a337e9/4daa196bb0ca435bb38aeb7450a3e5dd [2019-12-07 20:01:39,762 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 20:01:39,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 20:01:39,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 20:01:39,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 20:01:39,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 20:01:39,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 08:01:39" (1/1) ... [2019-12-07 20:01:39,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9050c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:39, skipping insertion in model container [2019-12-07 20:01:39,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 08:01:39" (1/1) ... [2019-12-07 20:01:39,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 20:01:39,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 20:01:40,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 20:01:40,006 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 20:01:40,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 20:01:40,063 INFO L208 MainTranslator]: Completed translation [2019-12-07 20:01:40,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40 WrapperNode [2019-12-07 20:01:40,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 20:01:40,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 20:01:40,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 20:01:40,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 20:01:40,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 20:01:40,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 20:01:40,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 20:01:40,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 20:01:40,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... [2019-12-07 20:01:40,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 20:01:40,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 20:01:40,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 20:01:40,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 20:01:40,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/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 [2019-12-07 20:01:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 20:01:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 20:01:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 20:01:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 20:01:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 20:01:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 20:01:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 20:01:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 20:01:40,405 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 20:01:40,405 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 20:01:40,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 08:01:40 BoogieIcfgContainer [2019-12-07 20:01:40,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 20:01:40,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 20:01:40,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 20:01:40,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 20:01:40,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 08:01:39" (1/3) ... [2019-12-07 20:01:40,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9adae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 08:01:40, skipping insertion in model container [2019-12-07 20:01:40,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:01:40" (2/3) ... [2019-12-07 20:01:40,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9adae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 08:01:40, skipping insertion in model container [2019-12-07 20:01:40,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 08:01:40" (3/3) ... [2019-12-07 20:01:40,412 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2019-12-07 20:01:40,418 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 20:01:40,423 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-12-07 20:01:40,430 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 20:01:40,444 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 20:01:40,444 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 20:01:40,444 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 20:01:40,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 20:01:40,445 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 20:01:40,445 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 20:01:40,445 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 20:01:40,445 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 20:01:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-12-07 20:01:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 20:01:40,457 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:01:40,458 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 20:01:40,458 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:01:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:01:40,462 INFO L82 PathProgramCache]: Analyzing trace with hash 147457697, now seen corresponding path program 1 times [2019-12-07 20:01:40,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 20:01:40,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880481755] [2019-12-07 20:01:40,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 20:01:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:01:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 20:01:40,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880481755] [2019-12-07 20:01:40,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 20:01:40,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 20:01:40,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798059816] [2019-12-07 20:01:40,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 20:01:40,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 20:01:40,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 20:01:40,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 20:01:40,574 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-12-07 20:01:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 20:01:40,587 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2019-12-07 20:01:40,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 20:01:40,588 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-12-07 20:01:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 20:01:40,593 INFO L225 Difference]: With dead ends: 57 [2019-12-07 20:01:40,594 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 20:01:40,596 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 [2019-12-07 20:01:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 20:01:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-12-07 20:01:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 20:01:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-12-07 20:01:40,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 5 [2019-12-07 20:01:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 20:01:40,617 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-12-07 20:01:40,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 20:01:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-12-07 20:01:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 20:01:40,618 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:01:40,618 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 20:01:40,618 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:01:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:01:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash 235252948, now seen corresponding path program 1 times [2019-12-07 20:01:40,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 20:01:40,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471132315] [2019-12-07 20:01:40,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 20:01:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:01:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 20:01:40,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471132315] [2019-12-07 20:01:40,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 20:01:40,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 20:01:40,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893201122] [2019-12-07 20:01:40,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 20:01:40,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 20:01:40,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 20:01:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 20:01:40,703 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2019-12-07 20:01:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 20:01:40,763 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-12-07 20:01:40,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 20:01:40,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-12-07 20:01:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 20:01:40,764 INFO L225 Difference]: With dead ends: 39 [2019-12-07 20:01:40,765 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 20:01:40,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 20:01:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 20:01:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2019-12-07 20:01:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 20:01:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-12-07 20:01:40,771 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2019-12-07 20:01:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 20:01:40,771 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-12-07 20:01:40,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 20:01:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-12-07 20:01:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 20:01:40,771 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:01:40,771 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 20:01:40,772 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:01:40,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:01:40,772 INFO L82 PathProgramCache]: Analyzing trace with hash -286379292, now seen corresponding path program 1 times [2019-12-07 20:01:40,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 20:01:40,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944216154] [2019-12-07 20:01:40,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 20:01:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:01:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 20:01:40,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944216154] [2019-12-07 20:01:40,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 20:01:40,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 20:01:40,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425680479] [2019-12-07 20:01:40,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 20:01:40,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 20:01:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 20:01:40,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 20:01:40,799 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2019-12-07 20:01:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 20:01:40,814 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2019-12-07 20:01:40,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 20:01:40,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-12-07 20:01:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 20:01:40,816 INFO L225 Difference]: With dead ends: 67 [2019-12-07 20:01:40,816 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 20:01:40,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 20:01:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 20:01:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2019-12-07 20:01:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 20:01:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-12-07 20:01:40,821 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 9 [2019-12-07 20:01:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 20:01:40,821 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-12-07 20:01:40,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 20:01:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-12-07 20:01:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 20:01:40,822 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:01:40,822 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 20:01:40,822 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:01:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:01:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1137918744, now seen corresponding path program 1 times [2019-12-07 20:01:40,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 20:01:40,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376475305] [2019-12-07 20:01:40,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 20:01:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 20:01:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 20:01:40,877 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 20:01:40,877 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 20:01:40,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 08:01:40 BoogieIcfgContainer [2019-12-07 20:01:40,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 20:01:40,895 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 20:01:40,895 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 20:01:40,895 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 20:01:40,895 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 08:01:40" (3/4) ... [2019-12-07 20:01:40,897 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 20:01:40,925 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4d656d69-1369-4fd4-a1e6-a352d588460b/bin/utaipan/witness.graphml [2019-12-07 20:01:40,925 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 20:01:40,927 INFO L168 Benchmark]: Toolchain (without parser) took 1163.22 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 940.9 MB in the beginning and 1.0 GB in the end (delta: -67.4 MB). Peak memory consumption was 45.9 MB. Max. memory is 11.5 GB. [2019-12-07 20:01:40,927 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 20:01:40,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -156.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 20:01:40,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.47 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. [2019-12-07 20:01:40,928 INFO L168 Benchmark]: Boogie Preprocessor took 20.31 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 20:01:40,928 INFO L168 Benchmark]: RCFGBuilder took 291.65 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: 34.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 11.5 GB. [2019-12-07 20:01:40,929 INFO L168 Benchmark]: TraceAbstraction took 487.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 49.4 MB). Peak memory consumption was 49.4 MB. Max. memory is 11.5 GB. [2019-12-07 20:01:40,929 INFO L168 Benchmark]: Witness Printer took 30.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 20:01:40,931 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 299.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -156.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.47 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. * Boogie Preprocessor took 20.31 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 291.65 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: 34.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 487.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 49.4 MB). Peak memory consumption was 49.4 MB. Max. memory is 11.5 GB. * Witness Printer took 30.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1023]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L986] SLL* head = malloc(sizeof(SLL)); [L987] head->next = head [L988] head->data = 0 [L990] SLL* x = head; [L991] int state = 1; [L994] COND FALSE !(__VERIFIER_nondet_int()) [L1016] x->data = state [L1018] EXPR head->next [L1018] x = head->next [L1019] COND FALSE !(!(((void*)0) != x)) [L1021] EXPR x->data [L1021] COND TRUE x->data != 0 [L1023] EXPR x->next [L1023] EXPR x->next->data [L1023] EXPR x->next->data != 0 && x->data > x->next->data [L1023] EXPR x->data [L1023] EXPR x->next [L1023] EXPR x->next->data [L1023] EXPR x->next->data != 0 && x->data > x->next->data [L1023] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1023] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 3 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 40 SDslu, 42 SDs, 0 SdLazy, 32 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, 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, 22 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 439 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...