./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-token_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-token_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/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 35a5ccff58935eefedf723cd2243fac7c8b8e61b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.23-5842f4b [2018-11-18 13:44:39,172 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:44:39,173 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:44:39,182 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:44:39,182 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:44:39,183 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:44:39,184 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:44:39,185 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:44:39,186 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:44:39,186 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:44:39,187 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:44:39,187 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:44:39,188 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:44:39,188 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:44:39,189 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:44:39,190 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:44:39,190 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:44:39,191 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:44:39,193 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:44:39,194 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:44:39,195 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:44:39,195 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:44:39,197 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:44:39,197 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:44:39,197 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:44:39,198 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:44:39,199 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:44:39,199 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:44:39,200 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:44:39,201 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:44:39,201 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:44:39,201 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:44:39,201 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:44:39,202 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:44:39,202 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:44:39,203 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:44:39,203 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 13:44:39,213 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:44:39,213 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:44:39,214 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:44:39,214 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 13:44:39,214 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 13:44:39,214 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 13:44:39,214 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 13:44:39,215 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 13:44:39,215 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 13:44:39,215 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 13:44:39,215 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 13:44:39,215 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 13:44:39,215 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 13:44:39,216 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:44:39,216 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:44:39,216 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:44:39,216 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:44:39,216 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:44:39,217 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:44:39,217 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:44:39,217 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:44:39,217 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:44:39,217 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:44:39,217 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:44:39,217 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:44:39,218 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:44:39,218 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:44:39,218 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:44:39,218 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:44:39,218 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:44:39,218 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:44:39,218 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:44:39,219 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:44:39,219 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 13:44:39,219 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:44:39,219 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:44:39,219 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 13:44:39,219 INFO L133 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/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/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 -> 35a5ccff58935eefedf723cd2243fac7c8b8e61b [2018-11-18 13:44:39,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:44:39,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:44:39,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:44:39,255 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:44:39,256 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:44:39,256 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/../../sv-benchmarks/c/forester-heap/dll-token_false-unreach-call_false-valid-memcleanup.i [2018-11-18 13:44:39,299 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/data/a0d57862f/8c37c49a15f549bca340062154f75791/FLAG59ff2080f [2018-11-18 13:44:39,742 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:44:39,742 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/sv-benchmarks/c/forester-heap/dll-token_false-unreach-call_false-valid-memcleanup.i [2018-11-18 13:44:39,751 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/data/a0d57862f/8c37c49a15f549bca340062154f75791/FLAG59ff2080f [2018-11-18 13:44:39,759 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/data/a0d57862f/8c37c49a15f549bca340062154f75791 [2018-11-18 13:44:39,761 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:44:39,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 13:44:39,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:44:39,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:44:39,764 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:44:39,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:44:39" (1/1) ... [2018-11-18 13:44:39,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249d3f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:39, skipping insertion in model container [2018-11-18 13:44:39,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:44:39" (1/1) ... [2018-11-18 13:44:39,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:44:39,797 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:44:39,986 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:44:39,992 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:44:40,018 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:44:40,093 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:44:40,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40 WrapperNode [2018-11-18 13:44:40,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:44:40,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 13:44:40,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 13:44:40,094 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 13:44:40,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 13:44:40,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:44:40,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:44:40,114 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:44:40,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... [2018-11-18 13:44:40,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:44:40,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:44:40,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:44:40,140 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:44:40,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/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 [2018-11-18 13:44:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 13:44:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 13:44:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 13:44:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:44:40,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:44:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:44:40,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:44:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-18 13:44:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-18 13:44:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 13:44:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:44:40,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:44:40,442 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:44:40,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:44:40 BoogieIcfgContainer [2018-11-18 13:44:40,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:44:40,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:44:40,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:44:40,447 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:44:40,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:44:39" (1/3) ... [2018-11-18 13:44:40,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43676adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:44:40, skipping insertion in model container [2018-11-18 13:44:40,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:44:40" (2/3) ... [2018-11-18 13:44:40,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43676adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:44:40, skipping insertion in model container [2018-11-18 13:44:40,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:44:40" (3/3) ... [2018-11-18 13:44:40,450 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-token_false-unreach-call_false-valid-memcleanup.i [2018-11-18 13:44:40,458 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:44:40,465 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-11-18 13:44:40,478 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-11-18 13:44:40,505 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:44:40,505 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:44:40,505 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:44:40,505 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:44:40,505 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:44:40,506 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:44:40,506 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:44:40,506 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:44:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-11-18 13:44:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 13:44:40,526 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:44:40,526 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:44:40,528 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:44:40,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:44:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1504952782, now seen corresponding path program 1 times [2018-11-18 13:44:40,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:44:40,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:40,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:44:40,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:40,582 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:44:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:44:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:44:40,646 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:44:40,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:44:40,646 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:44:40,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:44:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:44:40,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:44:40,663 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-11-18 13:44:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:44:40,682 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2018-11-18 13:44:40,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:44:40,688 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-18 13:44:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:44:40,694 INFO L225 Difference]: With dead ends: 102 [2018-11-18 13:44:40,695 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 13:44:40,697 INFO L604 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 [2018-11-18 13:44:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 13:44:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 13:44:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 13:44:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-11-18 13:44:40,722 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 11 [2018-11-18 13:44:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:44:40,722 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-11-18 13:44:40,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:44:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-11-18 13:44:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 13:44:40,723 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:44:40,723 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:44:40,723 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:44:40,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:44:40,724 INFO L82 PathProgramCache]: Analyzing trace with hash -266784320, now seen corresponding path program 1 times [2018-11-18 13:44:40,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:44:40,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:40,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:44:40,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:40,725 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:44:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:44:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:44:40,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:44:40,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 13:44:40,822 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:44:40,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 13:44:40,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 13:44:40,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 13:44:40,824 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 4 states. [2018-11-18 13:44:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:44:40,902 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-11-18 13:44:40,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:44:40,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-11-18 13:44:40,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:44:40,903 INFO L225 Difference]: With dead ends: 48 [2018-11-18 13:44:40,903 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 13:44:40,904 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:44:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 13:44:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-18 13:44:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 13:44:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-11-18 13:44:40,907 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 12 [2018-11-18 13:44:40,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:44:40,907 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-11-18 13:44:40,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 13:44:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-11-18 13:44:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 13:44:40,908 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:44:40,908 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:44:40,908 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:44:40,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:44:40,909 INFO L82 PathProgramCache]: Analyzing trace with hash 318390392, now seen corresponding path program 1 times [2018-11-18 13:44:40,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:44:40,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:40,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:44:40,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:40,910 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:44:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:44:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:44:40,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:44:40,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 13:44:40,955 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:44:40,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 13:44:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 13:44:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 13:44:40,955 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2018-11-18 13:44:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:44:40,998 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-11-18 13:44:40,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:44:40,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-11-18 13:44:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:44:40,999 INFO L225 Difference]: With dead ends: 75 [2018-11-18 13:44:40,999 INFO L226 Difference]: Without dead ends: 73 [2018-11-18 13:44:40,999 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:44:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-18 13:44:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2018-11-18 13:44:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 13:44:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-11-18 13:44:41,003 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 13 [2018-11-18 13:44:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:44:41,003 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-11-18 13:44:41,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 13:44:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-11-18 13:44:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 13:44:41,004 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:44:41,004 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:44:41,004 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:44:41,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:44:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1262223739, now seen corresponding path program 1 times [2018-11-18 13:44:41,004 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:44:41,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:41,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:44:41,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:41,006 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:44:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:44:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:44:41,038 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:44:41,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:44:41,038 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:44:41,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:44:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:44:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:44:41,038 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 5 states. [2018-11-18 13:44:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:44:41,108 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-11-18 13:44:41,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:44:41,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-18 13:44:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:44:41,109 INFO L225 Difference]: With dead ends: 44 [2018-11-18 13:44:41,110 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 13:44:41,110 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:44:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 13:44:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 13:44:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 13:44:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-11-18 13:44:41,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 19 [2018-11-18 13:44:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:44:41,118 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-11-18 13:44:41,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:44:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-11-18 13:44:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 13:44:41,118 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:44:41,119 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:44:41,119 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:44:41,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:44:41,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1262260482, now seen corresponding path program 1 times [2018-11-18 13:44:41,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:44:41,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:41,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:44:41,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:41,121 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:44:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:44:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:44:41,221 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:44:41,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:44:41,222 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:44:41,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:44:41,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:44:41,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:44:41,223 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 5 states. [2018-11-18 13:44:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:44:41,311 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2018-11-18 13:44:41,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:44:41,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-18 13:44:41,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:44:41,312 INFO L225 Difference]: With dead ends: 82 [2018-11-18 13:44:41,313 INFO L226 Difference]: Without dead ends: 56 [2018-11-18 13:44:41,313 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:44:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-18 13:44:41,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2018-11-18 13:44:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-18 13:44:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2018-11-18 13:44:41,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 19 [2018-11-18 13:44:41,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:44:41,319 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2018-11-18 13:44:41,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:44:41,319 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2018-11-18 13:44:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 13:44:41,320 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:44:41,320 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:44:41,320 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:44:41,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:44:41,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1770286947, now seen corresponding path program 1 times [2018-11-18 13:44:41,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:44:41,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:41,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:44:41,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:44:41,322 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:44:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:44:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:44:41,363 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 13:44:41,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:44:41 BoogieIcfgContainer [2018-11-18 13:44:41,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:44:41,392 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:44:41,392 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:44:41,392 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:44:41,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:44:40" (3/4) ... [2018-11-18 13:44:41,395 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 13:44:41,431 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2f7a7161-5e44-447e-adbe-1d1cdf7f0b33/bin-2019/utaipan/witness.graphml [2018-11-18 13:44:41,431 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:44:41,432 INFO L168 Benchmark]: Toolchain (without parser) took 1670.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 955.5 MB in the beginning and 1.0 GB in the end (delta: -54.0 MB). Peak memory consumption was 94.3 MB. Max. memory is 11.5 GB. [2018-11-18 13:44:41,433 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:44:41,433 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 955.5 MB in the beginning and 1.1 GB in the end (delta: -182.7 MB). Peak memory consumption was 33.2 MB. Max. memory is 11.5 GB. [2018-11-18 13:44:41,434 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.47 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:44:41,434 INFO L168 Benchmark]: Boogie Preprocessor took 26.34 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:44:41,435 INFO L168 Benchmark]: RCFGBuilder took 302.98 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: 29.8 MB). Peak memory consumption was 29.8 MB. Max. memory is 11.5 GB. [2018-11-18 13:44:41,435 INFO L168 Benchmark]: TraceAbstraction took 948.28 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: 88.7 MB). Peak memory consumption was 88.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:44:41,436 INFO L168 Benchmark]: Witness Printer took 39.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:44:41,438 INFO L336 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 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 331.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 955.5 MB in the beginning and 1.1 GB in the end (delta: -182.7 MB). Peak memory consumption was 33.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.47 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.34 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 302.98 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: 29.8 MB). Peak memory consumption was 29.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 948.28 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: 88.7 MB). Peak memory consumption was 88.7 MB. Max. memory is 11.5 GB. * Witness Printer took 39.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1026]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L993] EXPR, FCALL malloc(sizeof(SLL)) [L993] SLL* head = malloc(sizeof(SLL)); [L994] FCALL head->next = ((void*)0) [L995] FCALL head->prev = ((void*)0) [L996] FCALL head->data = 0 [L998] SLL* x = head; VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, x={15:0}] [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1010] FCALL x->data = 1 [L1011] EXPR, FCALL malloc(sizeof(SLL)) [L1011] FCALL x->next = malloc(sizeof(SLL)) [L1012] EXPR, FCALL x->next [L1012] FCALL x->next->prev = x [L1013] EXPR, FCALL x->next [L1013] FCALL x->next->data = 2 [L1015] x = head VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, malloc(sizeof(SLL))={14:0}, x={15:0}] [L1017] COND FALSE !(!(((void*)0) != x)) VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, malloc(sizeof(SLL))={14:0}, x={15:0}] [L1017] COND FALSE !(0) VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, malloc(sizeof(SLL))={14:0}, x={15:0}] [L1019] EXPR, FCALL x->data VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, malloc(sizeof(SLL))={14:0}, x={15:0}, x->data=1] [L1019] COND FALSE !(1 != x->data) [L1024] EXPR, FCALL x->data VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, malloc(sizeof(SLL))={14:0}, x={15:0}, x->data=1] [L1024] COND FALSE !(!(1 == x->data)) [L1024] COND FALSE !(0) VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, malloc(sizeof(SLL))={14:0}, x={15:0}] [L1025] EXPR, FCALL x->next [L1025] x = x->next [L1026] EXPR, FCALL x->data VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, malloc(sizeof(SLL))={14:0}, x={14:0}, x->data=2] [L1026] COND TRUE !(2 != x->data) [L1026] __VERIFIER_error() VAL [head={15:0}, malloc(sizeof(SLL))={15:0}, malloc(sizeof(SLL))={14:0}, x={14:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 54 locations, 6 error locations. UNSAFE Result, 0.8s OverallTime, 6 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 210 SDtfs, 105 SDslu, 271 SDs, 0 SdLazy, 139 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 33 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 3515 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...