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/forester-heap/sll-circular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:58:59,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:58:59,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:58:59,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:58:59,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:58:59,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:58:59,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:58:59,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:58:59,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:58:59,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:58:59,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:58:59,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:58:59,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:58:59,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:58:59,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:58:59,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:58:59,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:58:59,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:58:59,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:58:59,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:58:59,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:58:59,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:58:59,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:58:59,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:58:59,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:58:59,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:58:59,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:58:59,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:58:59,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:58:59,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:58:59,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:58:59,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:58:59,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:58:59,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:58:59,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:58:59,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:58:59,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:58:59,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:58:59,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:58:59,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:58:59,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:58:59,230 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 [2019-10-15 01:58:59,251 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:58:59,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:58:59,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:58:59,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:58:59,253 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:58:59,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:58:59,254 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:58:59,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:58:59,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:58:59,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:58:59,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:58:59,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:58:59,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:58:59,257 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:58:59,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:58:59,257 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:58:59,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:58:59,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:58:59,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:58:59,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:58:59,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:58:59,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:58:59,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:58:59,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:58:59,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:58:59,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:58:59,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:58:59,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:58:59,260 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 [2019-10-15 01:58:59,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:58:59,576 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:58:59,582 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:58:59,583 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:58:59,584 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:58:59,585 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular-1.i [2019-10-15 01:58:59,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e16a7f12/276da4de1de4450fa8f0330b4b0b0b6b/FLAG1bd210e8d [2019-10-15 01:59:00,109 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:59:00,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-circular-1.i [2019-10-15 01:59:00,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e16a7f12/276da4de1de4450fa8f0330b4b0b0b6b/FLAG1bd210e8d [2019-10-15 01:59:00,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e16a7f12/276da4de1de4450fa8f0330b4b0b0b6b [2019-10-15 01:59:00,485 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:59:00,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:59:00,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:59:00,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:59:00,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:59:00,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:59:00" (1/1) ... [2019-10-15 01:59:00,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8046215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:00, skipping insertion in model container [2019-10-15 01:59:00,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:59:00" (1/1) ... [2019-10-15 01:59:00,503 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:59:00,548 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:59:01,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:59:01,021 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:59:01,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:59:01,143 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:59:01,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01 WrapperNode [2019-10-15 01:59:01,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:59:01,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:59:01,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:59:01,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:59:01,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (1/1) ... [2019-10-15 01:59:01,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (1/1) ... [2019-10-15 01:59:01,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (1/1) ... [2019-10-15 01:59:01,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (1/1) ... [2019-10-15 01:59:01,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (1/1) ... [2019-10-15 01:59:01,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (1/1) ... [2019-10-15 01:59:01,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (1/1) ... [2019-10-15 01:59:01,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:59:01,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:59:01,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:59:01,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:59:01,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (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 [2019-10-15 01:59:01,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:59:01,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:59:01,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:59:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 01:59:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 01:59:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 01:59:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 01:59:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 01:59:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 01:59:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 01:59:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 01:59:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 01:59:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 01:59:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 01:59:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 01:59:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 01:59:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 01:59:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 01:59:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 01:59:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 01:59:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 01:59:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 01:59:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 01:59:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 01:59:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 01:59:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 01:59:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 01:59:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 01:59:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 01:59:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 01:59:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 01:59:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 01:59:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 01:59:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 01:59:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 01:59:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 01:59:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 01:59:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 01:59:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 01:59:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 01:59:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 01:59:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 01:59:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 01:59:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 01:59:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 01:59:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 01:59:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 01:59:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 01:59:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 01:59:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:59:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 01:59:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 01:59:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 01:59:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 01:59:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 01:59:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 01:59:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 01:59:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 01:59:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 01:59:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 01:59:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 01:59:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 01:59:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 01:59:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 01:59:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 01:59:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 01:59:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 01:59:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 01:59:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 01:59:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 01:59:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 01:59:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 01:59:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 01:59:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 01:59:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 01:59:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 01:59:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 01:59:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 01:59:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 01:59:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 01:59:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 01:59:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:59:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:59:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:59:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:59:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:59:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:59:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:59:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:59:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:59:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:59:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:59:01,921 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:59:01,921 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:59:01,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:59:01 BoogieIcfgContainer [2019-10-15 01:59:01,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:59:01,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:59:01,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:59:01,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:59:01,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:59:00" (1/3) ... [2019-10-15 01:59:01,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae0c4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:59:01, skipping insertion in model container [2019-10-15 01:59:01,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:01" (2/3) ... [2019-10-15 01:59:01,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae0c4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:59:01, skipping insertion in model container [2019-10-15 01:59:01,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:59:01" (3/3) ... [2019-10-15 01:59:01,931 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-circular-1.i [2019-10-15 01:59:01,941 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:59:01,950 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-10-15 01:59:01,962 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-10-15 01:59:01,989 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:59:01,989 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:59:01,989 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:59:01,989 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:59:01,991 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:59:01,992 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:59:01,992 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:59:01,993 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:59:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-10-15 01:59:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-15 01:59:02,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:02,035 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:02,039 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash 749315359, now seen corresponding path program 1 times [2019-10-15 01:59:02,057 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:02,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883352320] [2019-10-15 01:59:02,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:02,058 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:02,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:02,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883352320] [2019-10-15 01:59:02,206 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:59:02,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:59:02,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216164666] [2019-10-15 01:59:02,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:59:02,212 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:59:02,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:59:02,229 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2019-10-15 01:59:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:02,255 INFO L93 Difference]: Finished difference Result 65 states and 99 transitions. [2019-10-15 01:59:02,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:59:02,257 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-15 01:59:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:02,265 INFO L225 Difference]: With dead ends: 65 [2019-10-15 01:59:02,266 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:59:02,269 INFO L600 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 [2019-10-15 01:59:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:59:02,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 01:59:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:59:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-15 01:59:02,304 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2019-10-15 01:59:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:02,304 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-15 01:59:02,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:59:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-15 01:59:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:59:02,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:02,305 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:02,305 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1712971286, now seen corresponding path program 1 times [2019-10-15 01:59:02,306 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:02,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383127128] [2019-10-15 01:59:02,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:02,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:02,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:02,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383127128] [2019-10-15 01:59:02,505 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:59:02,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:59:02,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150620901] [2019-10-15 01:59:02,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:59:02,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:02,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:59:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:59:02,509 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2019-10-15 01:59:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:02,646 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-15 01:59:02,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:59:02,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-10-15 01:59:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:02,648 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:59:02,648 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:59:02,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:59:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:59:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2019-10-15 01:59:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:59:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-15 01:59:02,659 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2019-10-15 01:59:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:02,660 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-15 01:59:02,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:59:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-15 01:59:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:59:02,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:02,661 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:02,661 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:02,661 INFO L82 PathProgramCache]: Analyzing trace with hash -994155934, now seen corresponding path program 1 times [2019-10-15 01:59:02,662 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:02,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840217499] [2019-10-15 01:59:02,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:02,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:02,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:02,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840217499] [2019-10-15 01:59:02,734 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:59:02,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:59:02,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512654870] [2019-10-15 01:59:02,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:59:02,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:59:02,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:59:02,737 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 3 states. [2019-10-15 01:59:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:02,779 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-15 01:59:02,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:59:02,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:59:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:02,784 INFO L225 Difference]: With dead ends: 71 [2019-10-15 01:59:02,784 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:59:02,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:59:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:59:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-10-15 01:59:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:59:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-15 01:59:02,802 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 13 [2019-10-15 01:59:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:02,804 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-15 01:59:02,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:59:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-15 01:59:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:59:02,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:02,806 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:02,808 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1588532202, now seen corresponding path program 1 times [2019-10-15 01:59:02,809 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:02,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157545477] [2019-10-15 01:59:02,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:02,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:02,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:03,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157545477] [2019-10-15 01:59:03,165 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:59:03,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:59:03,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355782540] [2019-10-15 01:59:03,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:59:03,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:59:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:59:03,167 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 7 states. [2019-10-15 01:59:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:03,506 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2019-10-15 01:59:03,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:59:03,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-15 01:59:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:03,507 INFO L225 Difference]: With dead ends: 48 [2019-10-15 01:59:03,507 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:59:03,508 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:59:03,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:59:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-15 01:59:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-15 01:59:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-10-15 01:59:03,514 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2019-10-15 01:59:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:03,515 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-10-15 01:59:03,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:59:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-10-15 01:59:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:59:03,516 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:03,516 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:03,516 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash -428681333, now seen corresponding path program 1 times [2019-10-15 01:59:03,517 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:03,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58932922] [2019-10-15 01:59:03,517 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:03,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:03,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:03,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58932922] [2019-10-15 01:59:03,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104803778] [2019-10-15 01:59:03,605 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 [2019-10-15 01:59:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:03,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 01:59:03,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:59:03,798 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-15 01:59:03,799 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:03,811 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:03,811 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:59:03,812 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-15 01:59:03,844 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:03,845 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-10-15 01:59:03,846 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:03,857 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:03,864 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2019-10-15 01:59:03,865 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:03,905 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:03,906 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:59:03,906 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2019-10-15 01:59:03,938 INFO L341 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2019-10-15 01:59:03,938 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2019-10-15 01:59:03,939 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:03,948 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:03,948 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:59:03,949 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:23 [2019-10-15 01:59:03,957 INFO L392 ElimStorePlain]: Different costs {2=[|#memory_$Pointer$.base|], 6=[|v_#memory_$Pointer$.base_22|]} [2019-10-15 01:59:03,963 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:03,978 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:03,993 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:03,994 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 55 [2019-10-15 01:59:03,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:04,002 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:04,021 INFO L567 ElimStorePlain]: treesize reduction 23, result has 28.1 percent of original size [2019-10-15 01:59:04,022 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:59:04,022 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:66, output treesize:4 [2019-10-15 01:59:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:04,025 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:59:04,037 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:04,049 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:04,049 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:04,050 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2019-10-15 01:59:04,090 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:04,094 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:04,095 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:04,095 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2019-10-15 01:59:04,116 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 358 [2019-10-15 01:59:04,119 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-15 01:59:04,307 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2019-10-15 01:59:04,307 INFO L567 ElimStorePlain]: treesize reduction 305, result has 14.3 percent of original size [2019-10-15 01:59:04,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:04,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:04,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:04,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:04,321 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-10-15 01:59:04,322 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:43 [2019-10-15 01:59:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:04,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349929483] [2019-10-15 01:59:04,446 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:59:04,446 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:59:04,452 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:59:04,473 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:59:04,474 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:59:04,599 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:59:05,406 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:59:05,412 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:59:06,002 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:59:06,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 9] total 16 [2019-10-15 01:59:06,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115391315] [2019-10-15 01:59:06,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 01:59:06,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 01:59:06,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:59:06,006 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 16 states. [2019-10-15 01:59:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:06,917 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2019-10-15 01:59:06,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:59:06,918 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-10-15 01:59:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:06,919 INFO L225 Difference]: With dead ends: 61 [2019-10-15 01:59:06,919 INFO L226 Difference]: Without dead ends: 59 [2019-10-15 01:59:06,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:59:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-15 01:59:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2019-10-15 01:59:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-15 01:59:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2019-10-15 01:59:06,928 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 16 [2019-10-15 01:59:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:06,928 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2019-10-15 01:59:06,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 01:59:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2019-10-15 01:59:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:59:06,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:06,930 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:07,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:59:07,133 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash -963397692, now seen corresponding path program 1 times [2019-10-15 01:59:07,135 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:07,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799036985] [2019-10-15 01:59:07,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:07,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:07,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:07,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799036985] [2019-10-15 01:59:07,175 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:59:07,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:59:07,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638886074] [2019-10-15 01:59:07,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:59:07,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:07,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:59:07,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:59:07,177 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 3 states. [2019-10-15 01:59:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:07,205 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2019-10-15 01:59:07,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:59:07,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-15 01:59:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:07,206 INFO L225 Difference]: With dead ends: 93 [2019-10-15 01:59:07,207 INFO L226 Difference]: Without dead ends: 72 [2019-10-15 01:59:07,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:59:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-15 01:59:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2019-10-15 01:59:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-15 01:59:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2019-10-15 01:59:07,217 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 20 [2019-10-15 01:59:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:07,218 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2019-10-15 01:59:07,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:59:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2019-10-15 01:59:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:59:07,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:07,219 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:07,219 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash 61914005, now seen corresponding path program 1 times [2019-10-15 01:59:07,220 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:07,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245937079] [2019-10-15 01:59:07,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:07,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:07,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:07,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245937079] [2019-10-15 01:59:07,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963620021] [2019-10-15 01:59:07,476 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 [2019-10-15 01:59:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:07,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-15 01:59:07,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:59:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:08,175 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:59:08,621 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79