/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/heap-data/process_queue.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 02:10:23,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 02:10:23,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 02:10:23,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 02:10:23,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 02:10:23,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 02:10:23,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 02:10:23,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 02:10:23,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 02:10:23,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 02:10:23,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 02:10:23,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 02:10:23,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 02:10:23,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 02:10:23,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 02:10:23,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 02:10:23,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 02:10:23,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 02:10:23,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 02:10:23,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 02:10:23,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 02:10:23,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 02:10:23,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 02:10:23,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 02:10:23,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 02:10:23,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 02:10:23,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 02:10:23,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 02:10:23,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 02:10:23,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 02:10:23,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 02:10:23,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 02:10:23,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 02:10:23,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 02:10:23,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 02:10:23,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 02:10:23,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 02:10:23,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 02:10:23,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 02:10:23,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 02:10:23,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 02:10:23,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 02:10:23,309 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 02:10:23,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 02:10:23,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 02:10:23,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 02:10:23,313 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 02:10:23,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 02:10:23,314 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 02:10:23,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 02:10:23,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 02:10:23,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 02:10:23,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 02:10:23,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 02:10:23,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 02:10:23,316 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 02:10:23,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 02:10:23,316 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 02:10:23,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 02:10:23,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 02:10:23,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 02:10:23,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 02:10:23,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 02:10:23,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:10:23,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 02:10:23,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 02:10:23,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 02:10:23,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 02:10:23,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 02:10:23,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 02:10:23,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 02:10:23,596 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 02:10:23,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 02:10:23,619 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 02:10:23,620 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 02:10:23,621 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 02:10:23,621 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/process_queue.i [2019-11-07 02:10:23,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9bf5760/558f4e11e0644de6bb9a8a80f63a7d5a/FLAGa0d9cadc9 [2019-11-07 02:10:24,212 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 02:10:24,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/process_queue.i [2019-11-07 02:10:24,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9bf5760/558f4e11e0644de6bb9a8a80f63a7d5a/FLAGa0d9cadc9 [2019-11-07 02:10:24,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9bf5760/558f4e11e0644de6bb9a8a80f63a7d5a [2019-11-07 02:10:24,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 02:10:24,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 02:10:24,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 02:10:24,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 02:10:24,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 02:10:24,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:24" (1/1) ... [2019-11-07 02:10:24,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76732537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:24, skipping insertion in model container [2019-11-07 02:10:24,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:24" (1/1) ... [2019-11-07 02:10:24,549 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 02:10:24,585 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 02:10:25,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:10:25,067 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 02:10:25,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:10:25,180 INFO L192 MainTranslator]: Completed translation [2019-11-07 02:10:25,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25 WrapperNode [2019-11-07 02:10:25,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 02:10:25,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 02:10:25,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 02:10:25,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 02:10:25,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (1/1) ... [2019-11-07 02:10:25,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (1/1) ... [2019-11-07 02:10:25,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (1/1) ... [2019-11-07 02:10:25,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (1/1) ... [2019-11-07 02:10:25,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (1/1) ... [2019-11-07 02:10:25,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (1/1) ... [2019-11-07 02:10:25,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (1/1) ... [2019-11-07 02:10:25,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 02:10:25,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 02:10:25,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 02:10:25,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 02:10:25,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:10:25,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 02:10:25,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 02:10:25,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-07 02:10:25,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-07 02:10:25,325 INFO L138 BoogieDeclarations]: Found implementation of procedure run_process [2019-11-07 02:10:25,325 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2019-11-07 02:10:25,325 INFO L138 BoogieDeclarations]: Found implementation of procedure choose_next [2019-11-07 02:10:25,325 INFO L138 BoogieDeclarations]: Found implementation of procedure check_queue [2019-11-07 02:10:25,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 02:10:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 02:10:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 02:10:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-07 02:10:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-07 02:10:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 02:10:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 02:10:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 02:10:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 02:10:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 02:10:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 02:10:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 02:10:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 02:10:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 02:10:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 02:10:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 02:10:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 02:10:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 02:10:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 02:10:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 02:10:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 02:10:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 02:10:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 02:10:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 02:10:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 02:10:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 02:10:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 02:10:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 02:10:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 02:10:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 02:10:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 02:10:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 02:10:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 02:10:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 02:10:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 02:10:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 02:10:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 02:10:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 02:10:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 02:10:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 02:10:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 02:10:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 02:10:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 02:10:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 02:10:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 02:10:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 02:10:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 02:10:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 02:10:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 02:10:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 02:10:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 02:10:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 02:10:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 02:10:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 02:10:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 02:10:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 02:10:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 02:10:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 02:10:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 02:10:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-07 02:10:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 02:10:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 02:10:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 02:10:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-07 02:10:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 02:10:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 02:10:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-07 02:10:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 02:10:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 02:10:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-07 02:10:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 02:10:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 02:10:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 02:10:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 02:10:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 02:10:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 02:10:25,338 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 02:10:25,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 02:10:25,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 02:10:25,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 02:10:25,338 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 02:10:25,338 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 02:10:25,338 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 02:10:25,339 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 02:10:25,339 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 02:10:25,339 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 02:10:25,339 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 02:10:25,339 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 02:10:25,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 02:10:25,340 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 02:10:25,340 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 02:10:25,340 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 02:10:25,340 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 02:10:25,340 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 02:10:25,340 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 02:10:25,340 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 02:10:25,340 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 02:10:25,341 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 02:10:25,341 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 02:10:25,341 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 02:10:25,341 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 02:10:25,341 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 02:10:25,341 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 02:10:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 02:10:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 02:10:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 02:10:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 02:10:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 02:10:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure run_process [2019-11-07 02:10:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2019-11-07 02:10:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 02:10:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 02:10:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure choose_next [2019-11-07 02:10:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 02:10:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 02:10:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure check_queue [2019-11-07 02:10:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 02:10:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 02:10:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 02:10:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-07 02:10:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 02:10:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 02:10:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 02:10:26,236 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 02:10:26,237 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 02:10:26,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:26 BoogieIcfgContainer [2019-11-07 02:10:26,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 02:10:26,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 02:10:26,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 02:10:26,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 02:10:26,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:10:24" (1/3) ... [2019-11-07 02:10:26,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5785abe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:26, skipping insertion in model container [2019-11-07 02:10:26,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:25" (2/3) ... [2019-11-07 02:10:26,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5785abe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:26, skipping insertion in model container [2019-11-07 02:10:26,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:26" (3/3) ... [2019-11-07 02:10:26,248 INFO L109 eAbstractionObserver]: Analyzing ICFG process_queue.i [2019-11-07 02:10:26,259 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 02:10:26,268 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 02:10:26,280 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 02:10:26,306 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 02:10:26,307 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 02:10:26,307 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 02:10:26,307 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 02:10:26,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 02:10:26,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 02:10:26,308 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 02:10:26,308 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 02:10:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-11-07 02:10:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 02:10:26,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:10:26,337 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:10:26,339 INFO L410 AbstractCegarLoop]: === Iteration 1 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:10:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:10:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1029668330, now seen corresponding path program 1 times [2019-11-07 02:10:26,357 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:10:26,357 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323217349] [2019-11-07 02:10:26,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:10:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:10:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:10:26,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323217349] [2019-11-07 02:10:26,642 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:10:26,643 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 02:10:26,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427134890] [2019-11-07 02:10:26,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 02:10:26,649 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:10:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 02:10:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 02:10:26,666 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2019-11-07 02:10:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:10:26,868 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2019-11-07 02:10:26,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 02:10:26,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-07 02:10:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:10:26,889 INFO L225 Difference]: With dead ends: 77 [2019-11-07 02:10:26,889 INFO L226 Difference]: Without dead ends: 42 [2019-11-07 02:10:26,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 02:10:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-07 02:10:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-07 02:10:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-07 02:10:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-11-07 02:10:26,961 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 15 [2019-11-07 02:10:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:10:26,962 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-11-07 02:10:26,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 02:10:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-11-07 02:10:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 02:10:26,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:10:26,965 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:10:26,966 INFO L410 AbstractCegarLoop]: === Iteration 2 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:10:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:10:26,966 INFO L82 PathProgramCache]: Analyzing trace with hash -172051464, now seen corresponding path program 1 times [2019-11-07 02:10:26,967 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:10:26,967 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261284013] [2019-11-07 02:10:26,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:10:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:10:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:10:27,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261284013] [2019-11-07 02:10:27,379 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:10:27,379 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-11-07 02:10:27,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721098976] [2019-11-07 02:10:27,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 02:10:27,381 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:10:27,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 02:10:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 02:10:27,382 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 11 states. [2019-11-07 02:10:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:10:28,510 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2019-11-07 02:10:28,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 02:10:28,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-11-07 02:10:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:10:28,525 INFO L225 Difference]: With dead ends: 80 [2019-11-07 02:10:28,525 INFO L226 Difference]: Without dead ends: 78 [2019-11-07 02:10:28,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2019-11-07 02:10:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-07 02:10:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2019-11-07 02:10:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-07 02:10:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2019-11-07 02:10:28,545 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 17 [2019-11-07 02:10:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:10:28,545 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2019-11-07 02:10:28,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 02:10:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2019-11-07 02:10:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 02:10:28,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:10:28,547 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:10:28,548 INFO L410 AbstractCegarLoop]: === Iteration 3 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:10:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:10:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1685326830, now seen corresponding path program 1 times [2019-11-07 02:10:28,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:10:28,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968958313] [2019-11-07 02:10:28,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:10:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:10:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:10:28,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968958313] [2019-11-07 02:10:28,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828285886] [2019-11-07 02:10:28,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:10:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:10:29,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-07 02:10:29,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:10:29,166 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:10:29,181 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-07 02:10:29,182 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:29,211 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:29,216 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:10:29,218 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-11-07 02:10:29,219 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:29,243 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:29,249 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:10:29,257 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-07 02:10:29,258 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:29,279 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:29,288 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:10:29,290 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-11-07 02:10:29,291 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:29,301 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:29,302 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 02:10:29,303 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:94, output treesize:26 [2019-11-07 02:10:31,372 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_to_queue_~n.base Int)) (let ((.cse1 (+ |c_append_to_queue_#in~n.offset| 8))) (and (<= |c_append_to_queue_#in~n.base| append_to_queue_~n.base) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| append_to_queue_~n.base (store (select |c_old(#memory_$Pointer$.offset)| append_to_queue_~n.base) .cse1 (select (select |c_old(#memory_$Pointer$.offset)| |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset|))))) (store .cse0 |c_append_to_queue_#in~q.base| (store (select .cse0 |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset| |c_append_to_queue_#in~n.offset|))) |c_#memory_$Pointer$.offset|) (= (let ((.cse2 (store |c_old(#memory_$Pointer$.base)| append_to_queue_~n.base (store (select |c_old(#memory_$Pointer$.base)| append_to_queue_~n.base) .cse1 (select (select |c_old(#memory_$Pointer$.base)| |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset|))))) (store .cse2 |c_append_to_queue_#in~q.base| (store (select .cse2 |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset| append_to_queue_~n.base))) |c_#memory_$Pointer$.base|)))) is different from true [2019-11-07 02:10:31,402 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:10:31,405 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2019-11-07 02:10:31,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:31,427 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:31,433 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:10:31,436 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2019-11-07 02:10:31,437 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:31,455 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:31,456 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 02:10:31,457 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:42 [2019-11-07 02:10:31,689 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 02:10:31,691 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:31,691 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38 [2019-11-07 02:10:31,693 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:10:31,723 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:31,735 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:10:31,739 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:31,740 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2019-11-07 02:10:31,741 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:31,748 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:31,749 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 02:10:31,749 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:7 [2019-11-07 02:10:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:10:31,755 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:10:32,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:10:32,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:10:32,456 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2019-11-07 02:10:33,284 WARN L191 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2019-11-07 02:10:33,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:10:33,320 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_41|, |v_#memory_$Pointer$.offset_41|], 6=[|v_#memory_$Pointer$.base_51|, |v_#memory_$Pointer$.offset_51|]} [2019-11-07 02:10:33,329 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:10:33,335 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:10:33,436 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:33,444 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:10:33,452 INFO L496 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:10:33,526 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:33,535 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:10:33,543 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:33,599 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:33,604 INFO L496 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:10:33,611 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-11-07 02:10:33,648 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:10:33,650 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-2 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2019-11-07 02:10:33,651 INFO L221 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:225, output treesize:229 [2019-11-07 02:10:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:10:34,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357602215] [2019-11-07 02:10:34,684 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 02:10:34,684 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 02:10:34,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 02:10:34,696 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 02:10:34,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 02:10:34,775 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 02:10:35,730 INFO L197 IcfgInterpreter]: Interpreting procedure check_queue with input of size 22 for LOIs [2019-11-07 02:10:35,761 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_queue with input of size 63 for LOIs [2019-11-07 02:10:35,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 02:10:35,781 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 02:10:36,670 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2019-11-07 02:10:37,016 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2019-11-07 02:10:37,781 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 02:10:37,781 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11, 15] total 40 [2019-11-07 02:10:37,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930915031] [2019-11-07 02:10:37,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-07 02:10:37,783 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:10:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-07 02:10:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1349, Unknown=1, NotChecked=74, Total=1560 [2019-11-07 02:10:37,784 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 40 states. [2019-11-07 02:10:38,516 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2019-11-07 02:10:38,961 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 106 [2019-11-07 02:10:41,678 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2019-11-07 02:10:42,599 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 69 [2019-11-07 02:10:43,131 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2019-11-07 02:10:48,018 WARN L191 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2019-11-07 02:10:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:10:52,356 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2019-11-07 02:10:52,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-07 02:10:52,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2019-11-07 02:10:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:10:52,358 INFO L225 Difference]: With dead ends: 147 [2019-11-07 02:10:52,358 INFO L226 Difference]: Without dead ends: 106 [2019-11-07 02:10:52,360 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=369, Invalid=2939, Unknown=2, NotChecked=112, Total=3422 [2019-11-07 02:10:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-07 02:10:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2019-11-07 02:10:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-07 02:10:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2019-11-07 02:10:52,381 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 20 [2019-11-07 02:10:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:10:52,382 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2019-11-07 02:10:52,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-07 02:10:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2019-11-07 02:10:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 02:10:52,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:10:52,384 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:10:52,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:10:52,589 INFO L410 AbstractCegarLoop]: === Iteration 4 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:10:52,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:10:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1235894599, now seen corresponding path program 1 times [2019-11-07 02:10:52,590 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:10:52,591 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724849987] [2019-11-07 02:10:52,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:10:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:10:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 02:10:52,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724849987] [2019-11-07 02:10:52,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766195480] [2019-11-07 02:10:52,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:10:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:10:52,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-07 02:10:52,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:10:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 02:10:52,951 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:10:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 02:10:53,101 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 02:10:53,101 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 13 [2019-11-07 02:10:53,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326878512] [2019-11-07 02:10:53,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 02:10:53,102 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:10:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 02:10:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-11-07 02:10:53,103 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 9 states. [2019-11-07 02:10:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:10:53,309 INFO L93 Difference]: Finished difference Result 175 states and 224 transitions. [2019-11-07 02:10:53,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 02:10:53,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-07 02:10:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:10:53,311 INFO L225 Difference]: With dead ends: 175 [2019-11-07 02:10:53,311 INFO L226 Difference]: Without dead ends: 108 [2019-11-07 02:10:53,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-07 02:10:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-07 02:10:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2019-11-07 02:10:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-07 02:10:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2019-11-07 02:10:53,354 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 32 [2019-11-07 02:10:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:10:53,354 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2019-11-07 02:10:53,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 02:10:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2019-11-07 02:10:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-07 02:10:53,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:10:53,356 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:10:53,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:10:53,560 INFO L410 AbstractCegarLoop]: === Iteration 5 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:10:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:10:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash 277187053, now seen corresponding path program 2 times [2019-11-07 02:10:53,561 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:10:53,561 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741153077] [2019-11-07 02:10:53,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:10:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:10:54,235 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2019-11-07 02:10:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:10:54,498 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741153077] [2019-11-07 02:10:54,498 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902329000] [2019-11-07 02:10:54,499 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:10:54,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 02:10:54,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 02:10:54,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 93 conjunts are in the unsatisfiable core [2019-11-07 02:10:54,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:10:56,770 WARN L191 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 37 [2019-11-07 02:10:59,724 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-07 02:11:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 02:11:00,549 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:11:01,110 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-11-07 02:11:01,213 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2019-11-07 02:11:03,204 WARN L191 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2019-11-07 02:11:03,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:11:03,407 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:178) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:83) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:383) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:335) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:294) ... 21 more [2019-11-07 02:11:03,412 INFO L168 Benchmark]: Toolchain (without parser) took 38880.50 ms. Allocated memory was 144.7 MB in the beginning and 345.0 MB in the end (delta: 200.3 MB). Free memory was 101.4 MB in the beginning and 188.3 MB in the end (delta: -86.9 MB). Peak memory consumption was 113.4 MB. Max. memory is 7.1 GB. [2019-11-07 02:11:03,413 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 02:11:03,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 648.09 ms. Allocated memory was 144.7 MB in the beginning and 203.4 MB in the end (delta: 58.7 MB). Free memory was 101.0 MB in the beginning and 169.0 MB in the end (delta: -68.0 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2019-11-07 02:11:03,413 INFO L168 Benchmark]: Boogie Preprocessor took 65.22 ms. Allocated memory is still 203.4 MB. Free memory was 169.0 MB in the beginning and 166.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2019-11-07 02:11:03,414 INFO L168 Benchmark]: RCFGBuilder took 991.47 ms. Allocated memory is still 203.4 MB. Free memory was 166.2 MB in the beginning and 103.7 MB in the end (delta: 62.5 MB). Peak memory consumption was 62.5 MB. Max. memory is 7.1 GB. [2019-11-07 02:11:03,414 INFO L168 Benchmark]: TraceAbstraction took 37170.77 ms. Allocated memory was 203.4 MB in the beginning and 345.0 MB in the end (delta: 141.6 MB). Free memory was 103.7 MB in the beginning and 188.3 MB in the end (delta: -84.6 MB). Peak memory consumption was 57.0 MB. Max. memory is 7.1 GB. [2019-11-07 02:11:03,417 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 648.09 ms. Allocated memory was 144.7 MB in the beginning and 203.4 MB in the end (delta: 58.7 MB). Free memory was 101.0 MB in the beginning and 169.0 MB in the end (delta: -68.0 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.22 ms. Allocated memory is still 203.4 MB. Free memory was 169.0 MB in the beginning and 166.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 991.47 ms. Allocated memory is still 203.4 MB. Free memory was 166.2 MB in the beginning and 103.7 MB in the end (delta: 62.5 MB). Peak memory consumption was 62.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 37170.77 ms. Allocated memory was 203.4 MB in the beginning and 345.0 MB in the end (delta: 141.6 MB). Free memory was 103.7 MB in the beginning and 188.3 MB in the end (delta: -84.6 MB). Peak memory consumption was 57.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...