./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-token-2.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_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-token-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/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 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 0.1.25-f470102 [2019-12-07 19:52:51,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:52:51,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:52:51,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:52:51,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:52:51,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:52:51,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:52:51,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:52:51,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:52:51,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:52:51,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:52:51,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:52:51,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:52:51,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:52:51,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:52:51,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:52:51,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:52:51,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:52:51,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:52:51,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:52:51,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:52:51,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:52:51,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:52:51,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:52:51,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:52:51,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:52:51,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:52:51,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:52:51,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:52:51,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:52:51,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:52:51,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:52:51,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:52:51,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:52:51,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:52:51,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:52:51,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:52:51,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:52:51,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:52:51,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:52:51,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:52:51,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 19:52:51,269 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:52:51,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:52:51,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:52:51,270 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:52:51,270 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:52:51,270 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:52:51,270 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:52:51,270 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:52:51,270 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:52:51,270 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:52:51,270 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:52:51,270 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:52:51,271 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:52:51,271 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:52:51,271 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:52:51,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:52:51,271 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:52:51,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:52:51,273 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:52:51,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:52:51,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:52:51,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:52:51,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:52:51,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:52:51,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:52:51,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:52:51,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:52:51,274 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:52:51,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:52:51,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:52:51,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:52:51,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:52:51,274 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_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/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 -> 35a5ccff58935eefedf723cd2243fac7c8b8e61b [2019-12-07 19:52:51,380 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:52:51,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:52:51,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:52:51,391 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:52:51,391 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:52:51,391 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/../../sv-benchmarks/c/forester-heap/dll-token-2.i [2019-12-07 19:52:51,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/data/a68ab0045/fb750f4725e34f84bf0e59523fc2806e/FLAGc2478181e [2019-12-07 19:52:51,816 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:52:51,817 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/sv-benchmarks/c/forester-heap/dll-token-2.i [2019-12-07 19:52:51,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/data/a68ab0045/fb750f4725e34f84bf0e59523fc2806e/FLAGc2478181e [2019-12-07 19:52:51,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/data/a68ab0045/fb750f4725e34f84bf0e59523fc2806e [2019-12-07 19:52:51,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:52:51,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:52:51,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:52:51,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:52:51,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:52:51,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:52:51" (1/1) ... [2019-12-07 19:52:51,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407055d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:51, skipping insertion in model container [2019-12-07 19:52:51,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:52:51" (1/1) ... [2019-12-07 19:52:51,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:52:51,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:52:52,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:52:52,089 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:52:52,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:52:52,146 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:52:52,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52 WrapperNode [2019-12-07 19:52:52,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:52:52,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:52:52,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:52:52,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:52:52,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:52:52,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:52:52,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:52:52,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:52:52,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... [2019-12-07 19:52:52,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:52:52,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:52:52,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:52:52,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:52:52,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/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 19:52:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 19:52:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 19:52:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 19:52:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 19:52:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 19:52:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 19:52:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:52:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:52:52,493 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:52:52,493 INFO L287 CfgBuilder]: Removed 19 assume(true) statements. [2019-12-07 19:52:52,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:52:52 BoogieIcfgContainer [2019-12-07 19:52:52,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:52:52,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:52:52,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:52:52,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:52:52,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:52:51" (1/3) ... [2019-12-07 19:52:52,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be193ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:52:52, skipping insertion in model container [2019-12-07 19:52:52,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:52:52" (2/3) ... [2019-12-07 19:52:52,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be193ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:52:52, skipping insertion in model container [2019-12-07 19:52:52,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:52:52" (3/3) ... [2019-12-07 19:52:52,498 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2019-12-07 19:52:52,504 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:52:52,509 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-12-07 19:52:52,516 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-12-07 19:52:52,531 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:52:52,531 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:52:52,531 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:52:52,531 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:52:52,531 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:52:52,532 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:52:52,532 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:52:52,532 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:52:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-12-07 19:52:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 19:52:52,545 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:52:52,546 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 19:52:52,546 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:52:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:52:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash 176456257, now seen corresponding path program 1 times [2019-12-07 19:52:52,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:52:52,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064755920] [2019-12-07 19:52:52,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:52:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:52:52,644 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 19:52:52,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064755920] [2019-12-07 19:52:52,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:52:52,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 19:52:52,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912662090] [2019-12-07 19:52:52,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 19:52:52,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:52:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 19:52:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 19:52:52,658 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2019-12-07 19:52:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:52:52,672 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2019-12-07 19:52:52,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 19:52:52,673 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-12-07 19:52:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:52:52,679 INFO L225 Difference]: With dead ends: 81 [2019-12-07 19:52:52,679 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 19:52:52,681 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 19:52:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 19:52:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 19:52:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 19:52:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-12-07 19:52:52,704 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 5 [2019-12-07 19:52:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:52:52,704 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-12-07 19:52:52,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 19:52:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-12-07 19:52:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 19:52:52,705 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:52:52,705 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 19:52:52,705 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:52:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:52:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash 175689636, now seen corresponding path program 1 times [2019-12-07 19:52:52,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:52:52,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595648382] [2019-12-07 19:52:52,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:52:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:52:52,770 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 19:52:52,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595648382] [2019-12-07 19:52:52,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:52:52,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 19:52:52,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895708432] [2019-12-07 19:52:52,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 19:52:52,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:52:52,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 19:52:52,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:52:52,773 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 4 states. [2019-12-07 19:52:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:52:52,825 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-12-07 19:52:52,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 19:52:52,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 19:52:52,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:52:52,825 INFO L225 Difference]: With dead ends: 38 [2019-12-07 19:52:52,826 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 19:52:52,826 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 19:52:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 19:52:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-07 19:52:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 19:52:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-12-07 19:52:52,830 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 5 [2019-12-07 19:52:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:52:52,830 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-12-07 19:52:52,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 19:52:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-12-07 19:52:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 19:52:52,831 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:52:52,831 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 19:52:52,831 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:52:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:52:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1151367906, now seen corresponding path program 1 times [2019-12-07 19:52:52,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:52:52,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37807758] [2019-12-07 19:52:52,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:52:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:52:52,875 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 19:52:52,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37807758] [2019-12-07 19:52:52,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:52:52,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 19:52:52,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629335745] [2019-12-07 19:52:52,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 19:52:52,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:52:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 19:52:52,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:52:52,876 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 4 states. [2019-12-07 19:52:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:52:52,923 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2019-12-07 19:52:52,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 19:52:52,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-12-07 19:52:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:52:52,924 INFO L225 Difference]: With dead ends: 62 [2019-12-07 19:52:52,924 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 19:52:52,924 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 19:52:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 19:52:52,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2019-12-07 19:52:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 19:52:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-12-07 19:52:52,929 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 6 [2019-12-07 19:52:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:52:52,929 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-12-07 19:52:52,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 19:52:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-12-07 19:52:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 19:52:52,929 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:52:52,929 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:52:52,929 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:52:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:52:52,930 INFO L82 PathProgramCache]: Analyzing trace with hash 855581616, now seen corresponding path program 1 times [2019-12-07 19:52:52,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:52:52,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544853204] [2019-12-07 19:52:52,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:52:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:52:52,968 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 19:52:52,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544853204] [2019-12-07 19:52:52,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:52:52,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 19:52:52,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701390270] [2019-12-07 19:52:52,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 19:52:52,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:52:52,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 19:52:52,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:52:52,969 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2019-12-07 19:52:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:52:53,034 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-12-07 19:52:53,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 19:52:53,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 19:52:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:52:53,035 INFO L225 Difference]: With dead ends: 34 [2019-12-07 19:52:53,035 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 19:52:53,035 INFO L630 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 [2019-12-07 19:52:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 19:52:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 19:52:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 19:52:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-12-07 19:52:53,040 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 11 [2019-12-07 19:52:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:52:53,040 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-12-07 19:52:53,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 19:52:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-12-07 19:52:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 19:52:53,041 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:52:53,041 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:52:53,041 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:52:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:52:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash 855619352, now seen corresponding path program 1 times [2019-12-07 19:52:53,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:52:53,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137880610] [2019-12-07 19:52:53,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:52:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:52:53,125 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 19:52:53,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137880610] [2019-12-07 19:52:53,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:52:53,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 19:52:53,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325642991] [2019-12-07 19:52:53,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 19:52:53,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:52:53,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 19:52:53,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:52:53,126 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 5 states. [2019-12-07 19:52:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:52:53,214 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2019-12-07 19:52:53,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 19:52:53,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 19:52:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:52:53,215 INFO L225 Difference]: With dead ends: 67 [2019-12-07 19:52:53,216 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 19:52:53,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 19:52:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 19:52:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-12-07 19:52:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 19:52:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-12-07 19:52:53,220 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 11 [2019-12-07 19:52:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:52:53,221 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-12-07 19:52:53,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 19:52:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-12-07 19:52:53,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 19:52:53,221 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:52:53,221 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:52:53,221 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:52:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:52:53,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1714666408, now seen corresponding path program 1 times [2019-12-07 19:52:53,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:52:53,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686427214] [2019-12-07 19:52:53,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:52:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:52:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:52:53,268 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 19:52:53,268 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:52:53,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:52:53 BoogieIcfgContainer [2019-12-07 19:52:53,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:52:53,287 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:52:53,287 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:52:53,287 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:52:53,288 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:52:52" (3/4) ... [2019-12-07 19:52:53,289 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 19:52:53,321 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_688fdbc2-2d06-4ea5-9b73-8dc7856028ca/bin/utaipan/witness.graphml [2019-12-07 19:52:53,321 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:52:53,323 INFO L168 Benchmark]: Toolchain (without parser) took 1484.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 939.3 MB in the beginning and 947.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 93.2 MB. Max. memory is 11.5 GB. [2019-12-07 19:52:53,323 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:52:53,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:52:53,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.53 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 19:52:53,324 INFO L168 Benchmark]: Boogie Preprocessor took 21.25 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 19:52:53,324 INFO L168 Benchmark]: RCFGBuilder took 294.24 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: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 11.5 GB. [2019-12-07 19:52:53,325 INFO L168 Benchmark]: TraceAbstraction took 792.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 947.8 MB in the end (delta: 98.0 MB). Peak memory consumption was 98.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:52:53,325 INFO L168 Benchmark]: Witness Printer took 33.96 ms. Allocated memory is still 1.1 GB. Free memory is still 947.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:52:53,327 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 309.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.53 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 21.25 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 294.24 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: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 792.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 947.8 MB in the end (delta: 98.0 MB). Peak memory consumption was 98.0 MB. Max. memory is 11.5 GB. * Witness Printer took 33.96 ms. Allocated memory is still 1.1 GB. Free memory is still 947.8 MB. There was no memory consumed. 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] SLL* head = malloc(sizeof(SLL)); [L994] head->next = ((void*)0) [L995] head->prev = ((void*)0) [L996] head->data = 0 [L998] SLL* x = head; [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1010] x->data = 1 [L1011] x->next = malloc(sizeof(SLL)) [L1012] EXPR x->next [L1012] x->next->prev = x [L1013] EXPR x->next [L1013] x->next->data = 2 [L1015] x = head [L1017] COND FALSE !(!(((void*)0) != x)) [L1019] EXPR x->data [L1019] COND FALSE !(1 != x->data) [L1024] EXPR x->data [L1024] COND FALSE !(!(1 == x->data)) [L1025] EXPR x->next [L1025] x = x->next [L1026] EXPR x->data [L1026] COND TRUE !(2 != x->data) [L1026] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 6 error locations. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 157 SDtfs, 91 SDslu, 182 SDs, 0 SdLazy, 139 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 1221 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...