./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2af97cd1d0200c0dff6df008e1ae10eecdfc76e4 .................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-22 13:04:29,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:04:29,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:04:29,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:04:29,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:04:29,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:04:29,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:04:29,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:04:29,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:04:29,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:04:29,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:04:29,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:04:29,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:04:29,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:04:29,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:04:29,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:04:29,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:04:29,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:04:29,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:04:29,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:04:29,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:04:29,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:04:29,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:04:29,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:04:29,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:04:29,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:04:29,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:04:29,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:04:29,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:04:29,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:04:29,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:04:29,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:04:29,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:04:29,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:04:29,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:04:29,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:04:29,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:04:29,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:04:29,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:04:29,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:04:29,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:04:29,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:04:29,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:04:29,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:04:29,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:04:29,338 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:04:29,339 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:04:29,339 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:04:29,339 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:04:29,339 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:04:29,340 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:04:29,340 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:04:29,341 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:04:29,341 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:04:29,341 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:04:29,342 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:04:29,342 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:04:29,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:04:29,342 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:04:29,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:04:29,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:04:29,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:04:29,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:04:29,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:04:29,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:04:29,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:04:29,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:04:29,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:04:29,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:04:29,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:04:29,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:04:29,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:04:29,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:04:29,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:04:29,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:04:29,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:04:29,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:04:29,346 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:04:29,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:04:29,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:04:29,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:04:29,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:04:29,347 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2af97cd1d0200c0dff6df008e1ae10eecdfc76e4 [2020-11-22 13:04:29,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:04:29,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:04:29,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:04:29,684 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:04:29,684 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:04:29,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2020-11-22 13:04:29,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/data/cc3da136c/e50fb0e8adb546d5851c4c059745c2b7/FLAGc91751629 [2020-11-22 13:04:30,196 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:04:30,196 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2020-11-22 13:04:30,224 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/data/cc3da136c/e50fb0e8adb546d5851c4c059745c2b7/FLAGc91751629 [2020-11-22 13:04:30,535 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/data/cc3da136c/e50fb0e8adb546d5851c4c059745c2b7 [2020-11-22 13:04:30,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:04:30,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:04:30,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:30,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:04:30,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:04:30,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:30" (1/1) ... [2020-11-22 13:04:30,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108c34fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:30, skipping insertion in model container [2020-11-22 13:04:30,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:30" (1/1) ... [2020-11-22 13:04:30,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:04:30,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:04:30,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:30,951 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:04:31,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:31,083 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:04:31,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31 WrapperNode [2020-11-22 13:04:31,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:31,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:31,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:04:31,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:04:31,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:31,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:04:31,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:04:31,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:04:31,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... [2020-11-22 13:04:31,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:04:31,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:04:31,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:04:31,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:04:31,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/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 [2020-11-22 13:04:31,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:04:31,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-11-22 13:04:31,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:04:31,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:04:31,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:04:32,201 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:04:32,201 INFO L298 CfgBuilder]: Removed 46 assume(true) statements. [2020-11-22 13:04:32,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:32 BoogieIcfgContainer [2020-11-22 13:04:32,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:04:32,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:04:32,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:04:32,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:04:32,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:04:30" (1/3) ... [2020-11-22 13:04:32,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2c6712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:04:32, skipping insertion in model container [2020-11-22 13:04:32,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31" (2/3) ... [2020-11-22 13:04:32,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2c6712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:04:32, skipping insertion in model container [2020-11-22 13:04:32,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:32" (3/3) ... [2020-11-22 13:04:32,212 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-11-22 13:04:32,223 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:04:32,228 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-22 13:04:32,239 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-22 13:04:32,262 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:04:32,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:04:32,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:04:32,263 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:04:32,263 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:04:32,263 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:04:32,264 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:04:32,264 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:04:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-22 13:04:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:04:32,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:32,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:04:32,282 INFO L429 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]=== [2020-11-22 13:04:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash 168401, now seen corresponding path program 1 times [2020-11-22 13:04:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:32,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645388857] [2020-11-22 13:04:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:32,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645388857] [2020-11-22 13:04:32,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:32,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:04:32,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883159350] [2020-11-22 13:04:32,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:04:32,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:04:32,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:32,486 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-11-22 13:04:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:32,515 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-11-22 13:04:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:04:32,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:04:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:32,527 INFO L225 Difference]: With dead ends: 50 [2020-11-22 13:04:32,527 INFO L226 Difference]: Without dead ends: 21 [2020-11-22 13:04:32,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-22 13:04:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-22 13:04:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 13:04:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2020-11-22 13:04:32,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 3 [2020-11-22 13:04:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:32,560 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2020-11-22 13:04:32,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:04:32,561 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2020-11-22 13:04:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:04:32,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:32,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:32,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:04:32,562 INFO L429 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]=== [2020-11-22 13:04:32,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:32,563 INFO L82 PathProgramCache]: Analyzing trace with hash 707830995, now seen corresponding path program 1 times [2020-11-22 13:04:32,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:32,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982551344] [2020-11-22 13:04:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:32,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982551344] [2020-11-22 13:04:32,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:32,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:04:32,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837702131] [2020-11-22 13:04:32,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:04:32,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:32,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:04:32,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:04:32,667 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 4 states. [2020-11-22 13:04:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:32,723 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2020-11-22 13:04:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:04:32,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 13:04:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:32,724 INFO L225 Difference]: With dead ends: 21 [2020-11-22 13:04:32,724 INFO L226 Difference]: Without dead ends: 19 [2020-11-22 13:04:32,725 INFO L677 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 [2020-11-22 13:04:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-22 13:04:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-22 13:04:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 13:04:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-11-22 13:04:32,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 8 [2020-11-22 13:04:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:32,729 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-11-22 13:04:32,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:04:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-11-22 13:04:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:04:32,730 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:32,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:32,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:04:32,731 INFO L429 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]=== [2020-11-22 13:04:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1620792315, now seen corresponding path program 1 times [2020-11-22 13:04:32,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:32,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833663120] [2020-11-22 13:04:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:33,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833663120] [2020-11-22 13:04:33,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:33,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:04:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858770553] [2020-11-22 13:04:33,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:04:33,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:04:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:04:33,047 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand 7 states. [2020-11-22 13:04:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:33,273 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2020-11-22 13:04:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:04:33,274 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-22 13:04:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:33,275 INFO L225 Difference]: With dead ends: 19 [2020-11-22 13:04:33,275 INFO L226 Difference]: Without dead ends: 17 [2020-11-22 13:04:33,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:04:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-22 13:04:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-22 13:04:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:04:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2020-11-22 13:04:33,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 10 [2020-11-22 13:04:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:33,280 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2020-11-22 13:04:33,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:04:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2020-11-22 13:04:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:04:33,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:33,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:33,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:04:33,281 INFO L429 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]=== [2020-11-22 13:04:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1491685513, now seen corresponding path program 1 times [2020-11-22 13:04:33,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:33,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63915851] [2020-11-22 13:04:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:33,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63915851] [2020-11-22 13:04:33,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:33,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:04:33,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48362708] [2020-11-22 13:04:33,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:04:33,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:33,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:04:33,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:04:33,456 INFO L87 Difference]: Start difference. First operand 17 states and 16 transitions. Second operand 7 states. [2020-11-22 13:04:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:33,595 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2020-11-22 13:04:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:04:33,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-22 13:04:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:33,597 INFO L225 Difference]: With dead ends: 17 [2020-11-22 13:04:33,597 INFO L226 Difference]: Without dead ends: 15 [2020-11-22 13:04:33,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:04:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-22 13:04:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-22 13:04:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:04:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-11-22 13:04:33,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 12 [2020-11-22 13:04:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:33,601 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-11-22 13:04:33,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:04:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-11-22 13:04:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:04:33,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:33,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:33,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:04:33,603 INFO L429 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]=== [2020-11-22 13:04:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1009310433, now seen corresponding path program 1 times [2020-11-22 13:04:33,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:33,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138108732] [2020-11-22 13:04:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:04:33,654 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:04:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:04:33,697 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:04:33,732 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:04:33,732 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:04:33,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:04:33,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:04:33 BoogieIcfgContainer [2020-11-22 13:04:33,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:04:33,784 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:04:33,785 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:04:33,785 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:04:33,785 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:32" (3/4) ... [2020-11-22 13:04:33,787 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:04:33,847 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_381efe68-a72a-48c9-9bb7-55f09ae92fc0/bin/utaipan/witness.graphml [2020-11-22 13:04:33,847 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:04:33,849 INFO L168 Benchmark]: Toolchain (without parser) took 3309.55 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 54.7 MB in the beginning and 94.8 MB in the end (delta: -40.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:33,850 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory was 72.3 MB in the beginning and 72.2 MB in the end (delta: 135.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:33,850 INFO L168 Benchmark]: CACSL2BoogieTranslator took 540.70 ms. Allocated memory is still 94.4 MB. Free memory was 54.6 MB in the beginning and 60.9 MB in the end (delta: -6.3 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:33,851 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.05 ms. Allocated memory is still 94.4 MB. Free memory was 60.9 MB in the beginning and 58.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:33,852 INFO L168 Benchmark]: Boogie Preprocessor took 49.90 ms. Allocated memory is still 94.4 MB. Free memory was 58.8 MB in the beginning and 57.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:33,853 INFO L168 Benchmark]: RCFGBuilder took 992.45 ms. Allocated memory is still 94.4 MB. Free memory was 57.1 MB in the beginning and 40.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:33,853 INFO L168 Benchmark]: TraceAbstraction took 1578.45 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 40.2 MB in the beginning and 98.0 MB in the end (delta: -57.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:33,854 INFO L168 Benchmark]: Witness Printer took 63.25 ms. Allocated memory is still 134.2 MB. Free memory was 98.0 MB in the beginning and 94.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:33,858 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory was 72.3 MB in the beginning and 72.2 MB in the end (delta: 135.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 540.70 ms. Allocated memory is still 94.4 MB. Free memory was 54.6 MB in the beginning and 60.9 MB in the end (delta: -6.3 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.05 ms. Allocated memory is still 94.4 MB. Free memory was 60.9 MB in the beginning and 58.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.90 ms. Allocated memory is still 94.4 MB. Free memory was 58.8 MB in the beginning and 57.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 992.45 ms. Allocated memory is still 94.4 MB. Free memory was 57.1 MB in the beginning and 40.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1578.45 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 40.2 MB in the beginning and 98.0 MB in the end (delta: -57.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 63.25 ms. Allocated memory is still 134.2 MB. Free memory was 98.0 MB in the beginning and 94.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L519] void * guard_malloc_counter = 0; [L534] struct list_head *elem = ((void *)0); [L544] static struct list_head head; [L546] struct list_head *dev1, *dev2; [L522] (size > 0) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:0}, head={7:0}] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; [L529] return __getMemory(size); [L547] dev1 = my_malloc(sizeof(*dev1)) [L522] (size > 0) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:1}, head={7:0}] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; [L529] return __getMemory(size); [L548] dev2 = my_malloc(sizeof(*dev2)) [L549] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:2}, head={7:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:2}, head={7:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new [L541] COND FALSE !(entry==elem) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:1}, guard_malloc_counter={0:2}, head={7:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:1}, guard_malloc_counter={0:2}, head={7:0}] [L3] __assert_fail("0", "rule60_list2.c_1.i", 3, "reach_error") VAL [elem={0:1}, guard_malloc_counter={0:2}, head={7:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 41 SDslu, 39 SDs, 0 SdLazy, 115 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 2182 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...