/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/list-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:54:31,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:54:31,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:54:31,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:54:31,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:54:31,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:54:31,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:54:31,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:54:31,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:54:31,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:54:31,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:54:31,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:54:31,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:54:31,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:54:31,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:54:31,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:54:31,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:54:31,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:54:31,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:54:31,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:54:31,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:54:31,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:54:31,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:54:31,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:54:31,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 03:54:31,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 03:54:31,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 03:54:31,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 03:54:31,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 03:54:31,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 03:54:31,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 03:54:31,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 03:54:31,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 03:54:31,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 03:54:31,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 03:54:31,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 03:54:31,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 03:54:31,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 03:54:31,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:54:31,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:54:31,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:54:31,237 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 03:54:31,271 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:54:31,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:54:31,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:54:31,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:54:31,277 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:54:31,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:54:31,278 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:54:31,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:54:31,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:54:31,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:54:31,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:54:31,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:54:31,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:54:31,279 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:54:31,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:54:31,280 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:54:31,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:54:31,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:54:31,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:54:31,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:54:31,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:54:31,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:54:31,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:54:31,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:54:31,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:54:31,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:54:31,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:54:31,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:54:31,282 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 03:54:31,557 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:54:31,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:54:31,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:54:31,574 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:54:31,575 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:54:31,575 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2019-11-07 03:54:31,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8195f45/3d2e330065034affb2dc01858ea8fdd6/FLAGf825a8a98 [2019-11-07 03:54:32,141 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:54:32,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2019-11-07 03:54:32,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8195f45/3d2e330065034affb2dc01858ea8fdd6/FLAGf825a8a98 [2019-11-07 03:54:32,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8195f45/3d2e330065034affb2dc01858ea8fdd6 [2019-11-07 03:54:32,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:54:32,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:54:32,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:54:32,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:54:32,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:54:32,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:54:32" (1/1) ... [2019-11-07 03:54:32,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@539a2f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:32, skipping insertion in model container [2019-11-07 03:54:32,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:54:32" (1/1) ... [2019-11-07 03:54:32,498 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:54:32,563 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:54:33,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:54:33,077 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:54:33,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:54:33,179 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:54:33,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33 WrapperNode [2019-11-07 03:54:33,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:54:33,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:54:33,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:54:33,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:54:33,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (1/1) ... [2019-11-07 03:54:33,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (1/1) ... [2019-11-07 03:54:33,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (1/1) ... [2019-11-07 03:54:33,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (1/1) ... [2019-11-07 03:54:33,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (1/1) ... [2019-11-07 03:54:33,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (1/1) ... [2019-11-07 03:54:33,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (1/1) ... [2019-11-07 03:54:33,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:54:33,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:54:33,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:54:33,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:54:33,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (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 03:54:33,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:54:33,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:54:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-07 03:54:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-07 03:54:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-07 03:54:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-07 03:54:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2019-11-07 03:54:33,349 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-11-07 03:54:33,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:54:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:54:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 03:54:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-07 03:54:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-07 03:54:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 03:54:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 03:54:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 03:54:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 03:54:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 03:54:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 03:54:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 03:54:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 03:54:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 03:54:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 03:54:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 03:54:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 03:54:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 03:54:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 03:54:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 03:54:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 03:54:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 03:54:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 03:54:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 03:54:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 03:54:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 03:54:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 03:54:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 03:54:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 03:54:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 03:54:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 03:54:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 03:54:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 03:54:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 03:54:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 03:54:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 03:54:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 03:54:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 03:54:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 03:54:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 03:54:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 03:54:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 03:54:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 03:54:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 03:54:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 03:54:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 03:54:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 03:54:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 03:54:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 03:54:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 03:54:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 03:54:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 03:54:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 03:54:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 03:54:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 03:54:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 03:54:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 03:54:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 03:54:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 03:54:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-07 03:54:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 03:54:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 03:54:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 03:54:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-07 03:54:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 03:54:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 03:54:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-07 03:54:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 03:54:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 03:54:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-07 03:54:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 03:54:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 03:54:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 03:54:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 03:54:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 03:54:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 03:54:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 03:54:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 03:54:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 03:54:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 03:54:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 03:54:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 03:54:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 03:54:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 03:54:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 03:54:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 03:54:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 03:54:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 03:54:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 03:54:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 03:54:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 03:54:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 03:54:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 03:54:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 03:54:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 03:54:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 03:54:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 03:54:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 03:54:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 03:54:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 03:54:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 03:54:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 03:54:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 03:54:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 03:54:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 03:54:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 03:54:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 03:54:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 03:54:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-07 03:54:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-07 03:54:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 03:54:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 03:54:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2019-11-07 03:54:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 03:54:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-11-07 03:54:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:54:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:54:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:54:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:54:33,677 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-07 03:54:33,967 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:54:33,968 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 03:54:33,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:33 BoogieIcfgContainer [2019-11-07 03:54:33,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:54:33,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:54:33,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:54:33,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:54:33,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:54:32" (1/3) ... [2019-11-07 03:54:33,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715eba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:33, skipping insertion in model container [2019-11-07 03:54:33,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:33" (2/3) ... [2019-11-07 03:54:33,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715eba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:33, skipping insertion in model container [2019-11-07 03:54:33,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:33" (3/3) ... [2019-11-07 03:54:33,988 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2019-11-07 03:54:33,997 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:54:34,003 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:54:34,014 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:54:34,034 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:54:34,034 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:54:34,035 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:54:34,035 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:54:34,035 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:54:34,035 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:54:34,035 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:54:34,035 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:54:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-07 03:54:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 03:54:34,059 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:34,060 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:34,061 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1240224786, now seen corresponding path program 1 times [2019-11-07 03:54:34,077 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:34,077 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633172579] [2019-11-07 03:54:34,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:34,220 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 03:54:34,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633172579] [2019-11-07 03:54:34,222 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:34,222 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 03:54:34,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257217381] [2019-11-07 03:54:34,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 03:54:34,229 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:34,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 03:54:34,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 03:54:34,246 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2019-11-07 03:54:34,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:34,272 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-11-07 03:54:34,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 03:54:34,273 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-11-07 03:54:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:34,283 INFO L225 Difference]: With dead ends: 61 [2019-11-07 03:54:34,283 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 03:54:34,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 03:54:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 03:54:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 03:54:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 03:54:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-07 03:54:34,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2019-11-07 03:54:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:34,324 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-07 03:54:34,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 03:54:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-07 03:54:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 03:54:34,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:34,326 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:34,326 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:34,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:34,327 INFO L82 PathProgramCache]: Analyzing trace with hash -768999392, now seen corresponding path program 1 times [2019-11-07 03:54:34,327 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:34,327 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403012964] [2019-11-07 03:54:34,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:34,440 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 03:54:34,440 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403012964] [2019-11-07 03:54:34,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:34,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:54:34,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692485071] [2019-11-07 03:54:34,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:54:34,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:34,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:54:34,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:54:34,444 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2019-11-07 03:54:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:34,521 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2019-11-07 03:54:34,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:54:34,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-07 03:54:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:34,522 INFO L225 Difference]: With dead ends: 35 [2019-11-07 03:54:34,522 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 03:54:34,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 03:54:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 03:54:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-07 03:54:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-07 03:54:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-07 03:54:34,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2019-11-07 03:54:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:34,530 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-07 03:54:34,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:54:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-07 03:54:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 03:54:34,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:34,531 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:34,532 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:34,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1802014617, now seen corresponding path program 1 times [2019-11-07 03:54:34,532 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:34,533 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269873765] [2019-11-07 03:54:34,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:34,706 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269873765] [2019-11-07 03:54:34,707 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:34,707 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 03:54:34,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152467581] [2019-11-07 03:54:34,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 03:54:34,709 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 03:54:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-07 03:54:34,709 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2019-11-07 03:54:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:34,842 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-07 03:54:34,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 03:54:34,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-11-07 03:54:34,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:34,844 INFO L225 Difference]: With dead ends: 31 [2019-11-07 03:54:34,844 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 03:54:34,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-07 03:54:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 03:54:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-07 03:54:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 03:54:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-07 03:54:34,851 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2019-11-07 03:54:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:34,852 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-07 03:54:34,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 03:54:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-07 03:54:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 03:54:34,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:34,853 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:34,853 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:34,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1649529647, now seen corresponding path program 1 times [2019-11-07 03:54:34,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:34,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984427089] [2019-11-07 03:54:34,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:34,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984427089] [2019-11-07 03:54:34,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881880897] [2019-11-07 03:54:34,948 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 03:54:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:35,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 03:54:35,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:54:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:35,168 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:54:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:35,283 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798807101] [2019-11-07 03:54:35,308 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 03:54:35,309 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:54:35,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:54:35,321 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:54:35,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:54:35,455 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-11-07 03:54:35,570 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:36,000 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 13 for LOIs [2019-11-07 03:54:36,033 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 27 for LOIs [2019-11-07 03:54:36,236 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:36,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:54:36,308 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:54:36,671 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-11-07 03:54:36,942 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-11-07 03:54:37,280 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-11-07 03:54:37,523 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-11-07 03:54:37,861 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:54:37,861 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 18] total 26 [2019-11-07 03:54:37,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942465803] [2019-11-07 03:54:37,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 03:54:37,863 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:37,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 03:54:37,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2019-11-07 03:54:37,864 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 26 states. [2019-11-07 03:54:38,483 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2019-11-07 03:54:38,757 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2019-11-07 03:54:39,028 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2019-11-07 03:54:39,321 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2019-11-07 03:54:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:39,961 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2019-11-07 03:54:39,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-07 03:54:39,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 23 [2019-11-07 03:54:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:39,968 INFO L225 Difference]: With dead ends: 63 [2019-11-07 03:54:39,968 INFO L226 Difference]: Without dead ends: 51 [2019-11-07 03:54:39,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=305, Invalid=2145, Unknown=0, NotChecked=0, Total=2450 [2019-11-07 03:54:39,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-07 03:54:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2019-11-07 03:54:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 03:54:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-07 03:54:39,984 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2019-11-07 03:54:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:39,987 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-07 03:54:39,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 03:54:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-07 03:54:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 03:54:39,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:39,989 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:40,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:40,190 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:40,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1416611830, now seen corresponding path program 2 times [2019-11-07 03:54:40,191 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:40,191 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242006716] [2019-11-07 03:54:40,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:40,394 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242006716] [2019-11-07 03:54:40,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74296833] [2019-11-07 03:54:40,395 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 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 03:54:40,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 03:54:40,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:54:40,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-07 03:54:40,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:54:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:40,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:54:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:40,980 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155160061] [2019-11-07 03:54:40,982 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 03:54:40,982 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:54:40,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:54:40,983 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:54:40,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:54:41,010 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-11-07 03:54:41,063 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:41,323 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 13 for LOIs [2019-11-07 03:54:41,346 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 27 for LOIs [2019-11-07 03:54:41,592 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:41,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:54:41,634 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:54:42,413 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2019-11-07 03:54:44,808 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-11-07 03:54:45,524 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:54:45,524 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11, 18] total 40 [2019-11-07 03:54:45,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883205412] [2019-11-07 03:54:45,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-07 03:54:45,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-07 03:54:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1436, Unknown=1, NotChecked=0, Total=1560 [2019-11-07 03:54:45,530 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 40 states. [2019-11-07 03:54:48,148 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2019-11-07 03:54:52,442 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2019-11-07 03:54:56,636 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2019-11-07 03:54:58,869 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2019-11-07 03:54:59,096 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2019-11-07 03:54:59,435 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2019-11-07 03:55:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:55:00,639 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2019-11-07 03:55:00,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-07 03:55:00,639 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 26 [2019-11-07 03:55:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:55:00,642 INFO L225 Difference]: With dead ends: 55 [2019-11-07 03:55:00,642 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 03:55:00,645 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=428, Invalid=4126, Unknown=2, NotChecked=0, Total=4556 [2019-11-07 03:55:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 03:55:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2019-11-07 03:55:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 03:55:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-07 03:55:00,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2019-11-07 03:55:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:55:00,658 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-07 03:55:00,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-07 03:55:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-07 03:55:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-07 03:55:00,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:55:00,660 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:55:00,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:55:00,865 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:55:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:55:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1652265600, now seen corresponding path program 3 times [2019-11-07 03:55:00,866 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:55:00,866 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589746279] [2019-11-07 03:55:00,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:55:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:55:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 03:55:00,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589746279] [2019-11-07 03:55:00,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314432372] [2019-11-07 03:55:00,982 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 03:55:01,105 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 03:55:01,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:55:01,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 03:55:01,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:55:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 03:55:01,139 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:55:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 03:55:01,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596623817] [2019-11-07 03:55:01,209 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 03:55:01,226 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:55:01,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:55:01,228 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:55:01,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:55:01,268 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-11-07 03:55:01,325 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:55:01,535 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 13 for LOIs [2019-11-07 03:55:01,551 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 27 for LOIs [2019-11-07 03:55:01,706 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:55:01,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:55:01,750 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:55:02,320 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2019-11-07 03:55:02,675 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-11-07 03:55:02,901 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2019-11-07 03:55:03,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:55:03,238 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 18] total 27 [2019-11-07 03:55:03,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964955898] [2019-11-07 03:55:03,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-07 03:55:03,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:55:03,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-07 03:55:03,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2019-11-07 03:55:03,242 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 27 states. [2019-11-07 03:55:03,743 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2019-11-07 03:55:03,988 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2019-11-07 03:55:04,232 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2019-11-07 03:55:05,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:55:05,469 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-11-07 03:55:05,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-07 03:55:05,470 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2019-11-07 03:55:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:55:05,472 INFO L225 Difference]: With dead ends: 59 [2019-11-07 03:55:05,473 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 03:55:05,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=301, Invalid=2249, Unknown=0, NotChecked=0, Total=2550 [2019-11-07 03:55:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 03:55:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2019-11-07 03:55:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-07 03:55:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-11-07 03:55:05,487 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2019-11-07 03:55:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:55:05,487 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-11-07 03:55:05,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-07 03:55:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-11-07 03:55:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 03:55:05,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:55:05,489 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:55:05,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:55:05,693 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:55:05,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:55:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1996781878, now seen corresponding path program 4 times [2019-11-07 03:55:05,693 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:55:05,694 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184781026] [2019-11-07 03:55:05,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:55:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:55:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:55:05,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184781026] [2019-11-07 03:55:05,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210228234] [2019-11-07 03:55:05,944 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:55:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:55:06,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-07 03:55:06,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:55:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:55:06,846 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:55:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:55:07,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44209994] [2019-11-07 03:55:07,807 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 03:55:07,808 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:55:07,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:55:07,809 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:55:07,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:55:07,844 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-11-07 03:55:07,901 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:55:08,161 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 13 for LOIs [2019-11-07 03:55:08,180 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 27 for LOIs [2019-11-07 03:55:08,447 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:55:08,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:55:08,500 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:55:09,740 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-11-07 03:55:10,134 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-11-07 03:55:10,471 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-11-07 03:55:10,955 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:55:10,955 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 18] total 48 [2019-11-07 03:55:10,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032326980] [2019-11-07 03:55:10,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-07 03:55:10,957 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:55:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-07 03:55:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2106, Unknown=0, NotChecked=0, Total=2256 [2019-11-07 03:55:10,959 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 48 states. [2019-11-07 03:55:11,678 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2019-11-07 03:55:11,942 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2019-11-07 03:55:12,237 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2019-11-07 03:55:12,520 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2019-11-07 03:55:12,892 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2019-11-07 03:55:13,103 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-07 03:55:13,409 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2019-11-07 03:55:13,936 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2019-11-07 03:55:14,436 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59