./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-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_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/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 a71ed7b24cb625c47cfb1b6ba9f6cdbf2879f063 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:04:29,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:04:29,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:04:29,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:04:29,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:04:29,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:04:29,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:04:29,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:04:29,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:04:29,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:04:29,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:04:29,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:04:29,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:04:29,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:04:29,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:04:29,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:04:29,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:04:29,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:04:29,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:04:29,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:04:29,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:04:29,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:04:29,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:04:29,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:04:29,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:04:29,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:04:29,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:04:29,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:04:29,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:04:29,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:04:29,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:04:29,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:04:29,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:04:29,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:04:29,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:04:29,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:04:29,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:04:29,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:04:29,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:04:29,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:04:29,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:04:29,346 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:04:29,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:04:29,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:04:29,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:04:29,375 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:04:29,375 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:04:29,376 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:04:29,376 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:04:29,376 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:04:29,376 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:04:29,376 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:04:29,376 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:04:29,377 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:04:29,377 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:04:29,377 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:04:29,377 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:04:29,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:04:29,378 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:04:29,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:04:29,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:04:29,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:04:29,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:04:29,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:04:29,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:04:29,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:04:29,380 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:04:29,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:04:29,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:04:29,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:04:29,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:04:29,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:04:29,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:04:29,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:04:29,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:04:29,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:04:29,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:04:29,382 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:04:29,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:04:29,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:04:29,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:04:29,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:04:29,383 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_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a71ed7b24cb625c47cfb1b6ba9f6cdbf2879f063 [2020-11-22 13:04:29,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:04:29,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:04:29,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:04:29,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:04:29,651 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:04:29,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2020-11-22 13:04:29,744 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/data/e63c0895d/16fbfe59d01d4f788f932fd2e36060d7/FLAG0ef383562 [2020-11-22 13:04:30,233 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:04:30,234 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2020-11-22 13:04:30,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/data/e63c0895d/16fbfe59d01d4f788f932fd2e36060d7/FLAG0ef383562 [2020-11-22 13:04:30,561 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/data/e63c0895d/16fbfe59d01d4f788f932fd2e36060d7 [2020-11-22 13:04:30,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:04:30,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:04:30,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:30,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:04:30,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:04:30,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:30" (1/1) ... [2020-11-22 13:04:30,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@992e00b 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 13:04:30,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:30" (1/1) ... [2020-11-22 13:04:30,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:04:30,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:04:30,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:30,982 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:04:31,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:31,142 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:04:31,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:31 WrapperNode [2020-11-22 13:04:31,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:31,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:31,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:04:31,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:04:31,155 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 13:04:31,195 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 13:04:31,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:31,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:04:31,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:04:31,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:04:31,264 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 13:04:31,265 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 13:04:31,277 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 13:04:31,278 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 13:04:31,295 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 13:04:31,307 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 13:04:31,312 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 13:04:31,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:04:31,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:04:31,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:04:31,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:04:31,321 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_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/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 13:04:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 13:04:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-22 13:04:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:04:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-22 13:04:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:04:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-11-22 13:04:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:04:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:04:31,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:04:32,775 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:04:32,775 INFO L298 CfgBuilder]: Removed 177 assume(true) statements. [2020-11-22 13:04:32,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:32 BoogieIcfgContainer [2020-11-22 13:04:32,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:04:32,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:04:32,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:04:32,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:04:32,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:04:30" (1/3) ... [2020-11-22 13:04:32,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49810292 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 13:04:32,785 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 13:04:32,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49810292 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 13:04:32,786 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 13:04:32,788 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-11-22 13:04:32,799 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:04:32,804 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-11-22 13:04:32,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-11-22 13:04:32,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:04:32,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:04:32,865 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:04:32,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:04:32,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:04:32,865 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:04:32,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:04:32,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:04:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states. [2020-11-22 13:04:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:04:32,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:32,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:32,892 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2035889984, now seen corresponding path program 1 times [2020-11-22 13:04:32,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:32,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227391777] [2020-11-22 13:04:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:33,047 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 13:04:33,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227391777] [2020-11-22 13:04:33,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:33,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:04:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142602931] [2020-11-22 13:04:33,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:04:33,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:04:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:04:33,073 INFO L87 Difference]: Start difference. First operand 161 states. Second operand 2 states. [2020-11-22 13:04:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:33,110 INFO L93 Difference]: Finished difference Result 299 states and 497 transitions. [2020-11-22 13:04:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:04:33,112 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-22 13:04:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:33,121 INFO L225 Difference]: With dead ends: 299 [2020-11-22 13:04:33,122 INFO L226 Difference]: Without dead ends: 139 [2020-11-22 13:04:33,125 INFO L677 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 [2020-11-22 13:04:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-22 13:04:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-11-22 13:04:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-22 13:04:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2020-11-22 13:04:33,178 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 11 [2020-11-22 13:04:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:33,179 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2020-11-22 13:04:33,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:04:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2020-11-22 13:04:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:04:33,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:33,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:33,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:04:33,181 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:33,182 INFO L82 PathProgramCache]: Analyzing trace with hash -695644993, now seen corresponding path program 1 times [2020-11-22 13:04:33,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:33,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33237598] [2020-11-22 13:04:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:33,603 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 13:04:33,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33237598] [2020-11-22 13:04:33,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:33,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-22 13:04:33,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522084251] [2020-11-22 13:04:33,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:04:33,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:33,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:04:33,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:04:33,612 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 8 states. [2020-11-22 13:04:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:34,036 INFO L93 Difference]: Finished difference Result 237 states and 255 transitions. [2020-11-22 13:04:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:04:34,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-11-22 13:04:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:34,039 INFO L225 Difference]: With dead ends: 237 [2020-11-22 13:04:34,039 INFO L226 Difference]: Without dead ends: 231 [2020-11-22 13:04:34,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:04:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-11-22 13:04:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-11-22 13:04:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-22 13:04:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2020-11-22 13:04:34,066 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 14 [2020-11-22 13:04:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:34,066 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2020-11-22 13:04:34,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:04:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2020-11-22 13:04:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:04:34,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:34,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:34,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:04:34,074 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:34,078 INFO L82 PathProgramCache]: Analyzing trace with hash 820455435, now seen corresponding path program 1 times [2020-11-22 13:04:34,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:34,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244430897] [2020-11-22 13:04:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:34,521 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-11-22 13:04:34,662 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-11-22 13:04:34,857 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 13:04:34,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244430897] [2020-11-22 13:04:34,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:34,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-22 13:04:34,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55939838] [2020-11-22 13:04:34,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:04:34,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:34,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:04:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:04:34,859 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand 9 states. [2020-11-22 13:04:35,295 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-22 13:04:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:36,025 INFO L93 Difference]: Finished difference Result 293 states and 318 transitions. [2020-11-22 13:04:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-22 13:04:36,026 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-11-22 13:04:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:36,029 INFO L225 Difference]: With dead ends: 293 [2020-11-22 13:04:36,029 INFO L226 Difference]: Without dead ends: 287 [2020-11-22 13:04:36,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-22 13:04:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-22 13:04:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 169. [2020-11-22 13:04:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-11-22 13:04:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2020-11-22 13:04:36,070 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 16 [2020-11-22 13:04:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:36,070 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2020-11-22 13:04:36,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:04:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2020-11-22 13:04:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:04:36,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:36,072 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:36,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:04:36,072 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash 635368671, now seen corresponding path program 1 times [2020-11-22 13:04:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:36,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595199291] [2020-11-22 13:04:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:04:36,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595199291] [2020-11-22 13:04:36,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:36,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-22 13:04:36,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080424707] [2020-11-22 13:04:36,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:04:36,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:04:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:04:36,437 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand 8 states. [2020-11-22 13:04:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:36,779 INFO L93 Difference]: Finished difference Result 280 states and 307 transitions. [2020-11-22 13:04:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:04:36,780 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-11-22 13:04:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:36,781 INFO L225 Difference]: With dead ends: 280 [2020-11-22 13:04:36,782 INFO L226 Difference]: Without dead ends: 274 [2020-11-22 13:04:36,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:04:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-11-22 13:04:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 139. [2020-11-22 13:04:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-22 13:04:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2020-11-22 13:04:36,795 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 18 [2020-11-22 13:04:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:36,795 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2020-11-22 13:04:36,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:04:36,796 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2020-11-22 13:04:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-22 13:04:36,803 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:36,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:04:36,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:04:36,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1165264065, now seen corresponding path program 1 times [2020-11-22 13:04:36,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:36,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821450924] [2020-11-22 13:04:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:04:36,881 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:04:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:04:36,953 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:04:36,982 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:04:36,982 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:04:36,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:04:37,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:04:37 BoogieIcfgContainer [2020-11-22 13:04:37,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:04:37,031 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:04:37,031 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:04:37,031 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:04:37,032 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 13:04:37,034 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:04:37,089 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a08a56c7-5d5a-48f2-9fd7-efcf5a1b9ae7/bin/utaipan/witness.graphml [2020-11-22 13:04:37,089 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:04:37,091 INFO L168 Benchmark]: Toolchain (without parser) took 6525.20 ms. Allocated memory was 86.0 MB in the beginning and 155.2 MB in the end (delta: 69.2 MB). Free memory was 52.4 MB in the beginning and 116.5 MB in the end (delta: -64.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:37,091 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 86.0 MB. Free memory was 43.2 MB in the beginning and 43.1 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:37,092 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.75 ms. Allocated memory was 86.0 MB in the beginning and 119.5 MB in the end (delta: 33.6 MB). Free memory was 52.2 MB in the beginning and 82.2 MB in the end (delta: -30.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:37,093 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.07 ms. Allocated memory is still 119.5 MB. Free memory was 82.2 MB in the beginning and 78.7 MB in the end (delta: 3.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:37,093 INFO L168 Benchmark]: Boogie Preprocessor took 64.47 ms. Allocated memory is still 119.5 MB. Free memory was 78.7 MB in the beginning and 75.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:37,094 INFO L168 Benchmark]: RCFGBuilder took 1458.11 ms. Allocated memory is still 119.5 MB. Free memory was 75.2 MB in the beginning and 80.0 MB in the end (delta: -4.8 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:37,095 INFO L168 Benchmark]: TraceAbstraction took 4250.04 ms. Allocated memory was 119.5 MB in the beginning and 155.2 MB in the end (delta: 35.7 MB). Free memory was 79.6 MB in the beginning and 119.7 MB in the end (delta: -40.1 MB). Peak memory consumption was 75.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:37,095 INFO L168 Benchmark]: Witness Printer took 58.54 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 116.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:37,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 86.0 MB. Free memory was 43.2 MB in the beginning and 43.1 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 554.75 ms. Allocated memory was 86.0 MB in the beginning and 119.5 MB in the end (delta: 33.6 MB). Free memory was 52.2 MB in the beginning and 82.2 MB in the end (delta: -30.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.07 ms. Allocated memory is still 119.5 MB. Free memory was 82.2 MB in the beginning and 78.7 MB in the end (delta: 3.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.47 ms. Allocated memory is still 119.5 MB. Free memory was 78.7 MB in the beginning and 75.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1458.11 ms. Allocated memory is still 119.5 MB. Free memory was 75.2 MB in the beginning and 80.0 MB in the end (delta: -4.8 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4250.04 ms. Allocated memory was 119.5 MB in the beginning and 155.2 MB in the end (delta: 35.7 MB). Free memory was 79.6 MB in the beginning and 119.7 MB in the end (delta: -40.1 MB). Peak memory consumption was 75.2 MB. Max. memory is 16.1 GB. * Witness Printer took 58.54 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 116.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L588] struct node *list = ((void *)0); [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] struct node *list = create_sll(&p1, &p2); [L642] \read(*p1) [L642] \read(*p2) [L626] COND FALSE !(!(beg)) [L627] COND FALSE !(!(end)) [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg [L629] COND TRUE !(beg) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sll_to_dll_rev-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 161 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 487 SDtfs, 640 SDslu, 1646 SDs, 0 SdLazy, 614 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 344 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 13337 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 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...