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-properties/simple-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:14:35,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:14:35,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:14:35,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:14:35,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:14:35,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:14:35,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:14:35,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:14:35,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:14:35,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:14:35,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:14:35,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:14:35,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:14:35,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:14:35,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:14:35,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:14:35,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:14:35,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:14:35,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:14:35,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:14:35,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:14:35,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:14:35,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:14:35,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:14:35,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 13:14:35,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 13:14:35,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 13:14:35,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 13:14:35,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 13:14:35,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 13:14:35,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:14:35,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:14:35,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:14:35,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:14:35,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:14:35,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:14:35,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:14:35,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:14:35,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:14:35,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:14:35,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:14:35,313 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 [2019-10-07 13:14:35,344 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:14:35,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:14:35,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:14:35,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:14:35,347 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:14:35,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:14:35,347 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:14:35,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:14:35,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:14:35,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:14:35,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:14:35,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:14:35,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:14:35,349 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:14:35,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:14:35,350 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:14:35,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:14:35,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:14:35,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:14:35,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:14:35,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:14:35,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:14:35,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:14:35,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:14:35,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:14:35,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:14:35,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:14:35,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:14:35,353 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 [2019-10-07 13:14:35,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:14:35,672 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:14:35,675 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:14:35,677 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:14:35,677 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:14:35,678 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-2.i [2019-10-07 13:14:35,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8e3f586/887c4511e590402abac9d46cd1bdc715/FLAG1c679968d [2019-10-07 13:14:36,288 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:14:36,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/simple-2.i [2019-10-07 13:14:36,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8e3f586/887c4511e590402abac9d46cd1bdc715/FLAG1c679968d [2019-10-07 13:14:36,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8e3f586/887c4511e590402abac9d46cd1bdc715 [2019-10-07 13:14:36,628 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:14:36,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:14:36,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:14:36,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:14:36,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:14:36,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:14:36" (1/1) ... [2019-10-07 13:14:36,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345a22c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:36, skipping insertion in model container [2019-10-07 13:14:36,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:14:36" (1/1) ... [2019-10-07 13:14:36,646 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:14:36,689 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:14:37,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:14:37,167 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:14:37,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:14:37,273 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:14:37,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37 WrapperNode [2019-10-07 13:14:37,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:14:37,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:14:37,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:14:37,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:14:37,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (1/1) ... [2019-10-07 13:14:37,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (1/1) ... [2019-10-07 13:14:37,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (1/1) ... [2019-10-07 13:14:37,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (1/1) ... [2019-10-07 13:14:37,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (1/1) ... [2019-10-07 13:14:37,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (1/1) ... [2019-10-07 13:14:37,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (1/1) ... [2019-10-07 13:14:37,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:14:37,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:14:37,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:14:37,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:14:37,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (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 [2019-10-07 13:14:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:14:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:14:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-07 13:14:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-07 13:14:37,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-07 13:14:37,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-07 13:14:37,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-07 13:14:37,407 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-07 13:14:37,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:14:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:14:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 13:14:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-07 13:14:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-07 13:14:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-07 13:14:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-07 13:14:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-07 13:14:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-07 13:14:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-07 13:14:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-07 13:14:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-07 13:14:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-07 13:14:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-07 13:14:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-07 13:14:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-07 13:14:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-07 13:14:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-07 13:14:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-07 13:14:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-07 13:14:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-07 13:14:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-07 13:14:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-07 13:14:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-07 13:14:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-07 13:14:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-07 13:14:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-07 13:14:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-07 13:14:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-07 13:14:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-07 13:14:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-07 13:14:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-07 13:14:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-07 13:14:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-07 13:14:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-07 13:14:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-07 13:14:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-07 13:14:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-07 13:14:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-07 13:14:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-07 13:14:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-07 13:14:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-07 13:14:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-07 13:14:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-07 13:14:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-07 13:14:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-07 13:14:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-07 13:14:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-07 13:14:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-07 13:14:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-07 13:14:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-07 13:14:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-07 13:14:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-07 13:14:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-07 13:14:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-07 13:14:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-07 13:14:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-07 13:14:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-07 13:14:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 13:14:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 13:14:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-07 13:14:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 13:14:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-07 13:14:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-07 13:14:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-07 13:14:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-07 13:14:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-07 13:14:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-07 13:14:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-07 13:14:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-07 13:14:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 13:14:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-07 13:14:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-07 13:14:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-07 13:14:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-07 13:14:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-07 13:14:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-07 13:14:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-07 13:14:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-07 13:14:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-07 13:14:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-07 13:14:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-07 13:14:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-07 13:14:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-07 13:14:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-07 13:14:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-07 13:14:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-07 13:14:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-07 13:14:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-07 13:14:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-07 13:14:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-07 13:14:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-07 13:14:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-07 13:14:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-07 13:14:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-07 13:14:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-07 13:14:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-07 13:14:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-07 13:14:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-07 13:14:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-07 13:14:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-07 13:14:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-07 13:14:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-07 13:14:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-07 13:14:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-07 13:14:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-07 13:14:37,425 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-07 13:14:37,425 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-07 13:14:37,425 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-07 13:14:37,425 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-07 13:14:37,425 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-07 13:14:37,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:14:37,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 13:14:37,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 13:14:37,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 13:14:37,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 13:14:37,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 13:14:37,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:14:37,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:14:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 13:14:37,789 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-07 13:14:37,988 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:14:37,989 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-07 13:14:37,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:14:37 BoogieIcfgContainer [2019-10-07 13:14:37,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:14:37,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:14:37,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:14:37,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:14:37,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:14:36" (1/3) ... [2019-10-07 13:14:37,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a63a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:14:37, skipping insertion in model container [2019-10-07 13:14:37,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:14:37" (2/3) ... [2019-10-07 13:14:37,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a63a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:14:37, skipping insertion in model container [2019-10-07 13:14:37,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:14:37" (3/3) ... [2019-10-07 13:14:37,999 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-2.i [2019-10-07 13:14:38,009 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:14:38,018 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:14:38,037 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:14:38,058 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:14:38,058 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:14:38,058 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:14:38,059 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:14:38,059 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:14:38,059 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:14:38,059 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:14:38,059 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:14:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-07 13:14:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-07 13:14:38,080 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:14:38,081 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:14:38,083 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:14:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:14:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash 784795723, now seen corresponding path program 1 times [2019-10-07 13:14:38,094 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:14:38,095 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:14:38,095 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:14:38,095 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:14:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:14:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:14:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:14:38,241 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:14:38,242 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:14:38,242 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 13:14:38,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 13:14:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 13:14:38,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:14:38,266 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-10-07 13:14:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:14:38,285 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-10-07 13:14:38,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 13:14:38,286 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-07 13:14:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:14:38,295 INFO L225 Difference]: With dead ends: 33 [2019-10-07 13:14:38,295 INFO L226 Difference]: Without dead ends: 17 [2019-10-07 13:14:38,299 INFO L606 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 [2019-10-07 13:14:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-07 13:14:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-07 13:14:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-07 13:14:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-07 13:14:38,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-10-07 13:14:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:14:38,335 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-07 13:14:38,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 13:14:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-07 13:14:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-07 13:14:38,336 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:14:38,336 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:14:38,336 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:14:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:14:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1883773929, now seen corresponding path program 1 times [2019-10-07 13:14:38,337 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:14:38,337 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:14:38,338 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:14:38,338 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:14:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:14:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:14:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:14:38,453 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:14:38,453 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:14:38,454 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:14:38,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:14:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:14:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:14:38,457 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2019-10-07 13:14:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:14:38,584 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-10-07 13:14:38,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 13:14:38,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-07 13:14:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:14:38,586 INFO L225 Difference]: With dead ends: 32 [2019-10-07 13:14:38,586 INFO L226 Difference]: Without dead ends: 30 [2019-10-07 13:14:38,587 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 13:14:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-07 13:14:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2019-10-07 13:14:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-07 13:14:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-07 13:14:38,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2019-10-07 13:14:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:14:38,593 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-07 13:14:38,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:14:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-07 13:14:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-07 13:14:38,594 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:14:38,595 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:14:38,595 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:14:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:14:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1461611009, now seen corresponding path program 1 times [2019-10-07 13:14:38,596 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:14:38,596 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:14:38,596 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:14:38,596 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:14:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:14:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:14:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:14:38,765 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:14:38,766 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:14:38,766 INFO L95 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 [2019-10-07 13:14:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:14:38,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-07 13:14:38,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:14:38,963 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-10-07 13:14:38,964 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-07 13:14:38,976 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-07 13:14:38,980 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-10-07 13:14:38,981 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-07 13:14:38,987 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-07 13:14:38,988 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-07 13:14:38,988 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-10-07 13:14:39,007 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 15 treesize of output 7 [2019-10-07 13:14:39,008 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-07 13:14:39,017 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-07 13:14:39,020 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 15 treesize of output 7 [2019-10-07 13:14:39,021 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-07 13:14:39,027 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-07 13:14:39,027 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-07 13:14:39,028 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-10-07 13:14:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:14:39,030 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:14:39,080 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 35 treesize of output 29 [2019-10-07 13:14:39,083 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-07 13:14:39,093 INFO L567 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2019-10-07 13:14:39,093 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_12| vanished before elimination [2019-10-07 13:14:39,093 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-07 13:14:39,094 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2019-10-07 13:14:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:14:39,115 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:14:39,140 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-07 13:14:39,140 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:14:39,146 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:14:39,154 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:14:39,154 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:14:39,273 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-07 13:14:39,773 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-07 13:14:39,779 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:14:39,780 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:14:39,780 INFO L193 IcfgInterpreter]: Reachable states at location L536-2 satisfy 122#(or (and (not (= main_~p~0.offset 0)) (= 1 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset))) (and (not (= 0 main_~p~0.base)) (= 1 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset)))) [2019-10-07 13:14:39,780 INFO L193 IcfgInterpreter]: Reachable states at location L525-1 satisfy 53#(and (<= |main_#t~malloc2.offset| 0) (or (and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (= 0 |main_#t~malloc2.offset|) (not (= main_~a~0.offset 0)) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (= 0 (select |old(#valid)| 0)) (= main_~a~0.offset |main_#t~malloc2.offset|) (= main_~a~0.base main_~p~0.base) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= main_~a~0.offset main_~p~0.offset) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|)) (and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (= 0 |main_#t~malloc2.offset|) (not (= 0 main_~a~0.base)) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (= 0 (select |old(#valid)| 0)) (= main_~a~0.offset |main_#t~malloc2.offset|) (= main_~a~0.base main_~p~0.base) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= main_~a~0.offset main_~p~0.offset) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|))) (<= main_~a~0.offset 0) (<= 0 main_~a~0.offset) (<= 0 |#NULL.base|) (<= |main_#t~nondet3| 2147483647) (<= 0 |main_#t~malloc2.offset|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 main_~p~0.offset) (<= main_~p~0.offset 0) (<= 0 (+ |main_#t~nondet3| 2147483648))) [2019-10-07 13:14:39,781 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 126#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-07 13:14:39,781 INFO L193 IcfgInterpreter]: Reachable states at location L536 satisfy 107#(or (and (not (= 0 main_~p~0.base)) (= |main_#t~mem6| (select (select |#memory_int| main_~p~0.base) main_~p~0.offset))) (and (not (= main_~p~0.offset 0)) (= |main_#t~mem6| (select (select |#memory_int| main_~p~0.base) main_~p~0.offset)))) [2019-10-07 13:14:39,781 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 117#(or (and (not (= 1 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset))) (not (= 0 main_~p~0.base))) (and (not (= main_~p~0.offset 0)) (not (= 1 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset))))) [2019-10-07 13:14:39,781 INFO L193 IcfgInterpreter]: Reachable states at location L537 satisfy 112#(or (and (not (= 1 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset))) (not (= 0 main_~p~0.base))) (and (not (= main_~p~0.offset 0)) (not (= 1 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset))))) [2019-10-07 13:14:39,782 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-07 13:14:39,782 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|)) [2019-10-07 13:14:39,782 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 131#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-07 13:14:39,782 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:14:39,783 INFO L193 IcfgInterpreter]: Reachable states at location L522-3 satisfy 43#(and (<= |main_#t~malloc2.offset| 0) (or (and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (= 0 |main_#t~malloc2.offset|) (not (= main_~a~0.offset 0)) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (= 0 (select |old(#valid)| 0)) (= main_~a~0.offset |main_#t~malloc2.offset|) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|)) (and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (= 0 |main_#t~malloc2.offset|) (not (= 0 main_~a~0.base)) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (= 0 (select |old(#valid)| 0)) (= main_~a~0.offset |main_#t~malloc2.offset|) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|))) (<= main_~a~0.offset 0) (<= 0 main_~a~0.offset) (<= 0 |#NULL.base|) (<= 0 |main_#t~malloc2.offset|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-07 13:14:39,783 INFO L193 IcfgInterpreter]: Reachable states at location L525-4 satisfy 58#(and (<= 0 main_~p~0.offset) (<= |main_#t~malloc2.offset| 0) (<= main_~p~0.offset 0) (<= main_~a~0.offset 0) (<= 0 main_~a~0.offset) (or (and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (= 0 |main_#t~malloc2.offset|) (<= 0 |#NULL.base|) (not (= main_~a~0.offset 0)) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (= 0 (select |old(#valid)| 0)) (= main_~a~0.offset |main_#t~malloc2.offset|) (= main_~a~0.base main_~p~0.base) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= main_~a~0.offset main_~p~0.offset) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|)) (and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (= 0 |main_#t~malloc2.offset|) (not (= 0 main_~a~0.base)) (<= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (= 0 (select |old(#valid)| 0)) (= main_~a~0.offset |main_#t~malloc2.offset|) (= main_~a~0.base main_~p~0.base) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= main_~a~0.offset main_~p~0.offset) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|))) (<= 0 |main_#t~malloc2.offset|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-07 13:14:39,783 INFO L193 IcfgInterpreter]: Reachable states at location L522 satisfy 38#(and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (<= |main_#t~malloc2.offset| 0) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (<= main_~a~0.offset 0) (= 0 |main_#t~malloc2.offset|) (<= 0 main_~a~0.offset) (<= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (<= 0 |main_#t~malloc2.offset|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~a~0.offset |main_#t~malloc2.offset|) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|)) [2019-10-07 13:14:39,783 INFO L193 IcfgInterpreter]: Reachable states at location L525-3 satisfy 48#(and (<= 0 main_~p~0.offset) (<= |main_#t~malloc2.offset| 0) (<= main_~p~0.offset 0) (<= main_~a~0.offset 0) (<= 0 main_~a~0.offset) (or (and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (= 0 |main_#t~malloc2.offset|) (<= 0 |#NULL.base|) (not (= main_~a~0.offset 0)) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (= 0 (select |old(#valid)| 0)) (= main_~a~0.offset |main_#t~malloc2.offset|) (= main_~a~0.base main_~p~0.base) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= main_~a~0.offset main_~p~0.offset) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|)) (and (= (store |old(#length)| |main_#t~malloc2.base| 8) |#length|) (= 0 |#NULL.base|) (not (= |main_#t~malloc2.base| 0)) (<= |#NULL.base| 0) (= 0 |main_#t~malloc2.offset|) (not (= 0 main_~a~0.base)) (<= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_#t~malloc2.base| 1)) (= 0 (select |old(#valid)| 0)) (= main_~a~0.offset |main_#t~malloc2.offset|) (= main_~a~0.base main_~p~0.base) (= (select |old(#valid)| |main_#t~malloc2.base|) 0) (= |main_#t~malloc2.base| main_~a~0.base) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (< |#StackHeapBarrier| |main_#t~malloc2.base|) (= |#NULL.offset| 0) (= main_~a~0.offset main_~p~0.offset) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|))) (<= 0 |main_#t~malloc2.offset|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-07 13:14:39,784 INFO L193 IcfgInterpreter]: Reachable states at location L535-2 satisfy 102#true [2019-10-07 13:14:40,306 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-10-07 13:14:40,517 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2019-10-07 13:14:40,595 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:14:40,597 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 11] total 18 [2019-10-07 13:14:40,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-07 13:14:40,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-07 13:14:40,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2019-10-07 13:14:40,601 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 18 states. [2019-10-07 13:14:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:14:41,393 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-10-07 13:14:41,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-07 13:14:41,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-07 13:14:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:14:41,395 INFO L225 Difference]: With dead ends: 36 [2019-10-07 13:14:41,395 INFO L226 Difference]: Without dead ends: 26 [2019-10-07 13:14:41,396 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2019-10-07 13:14:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-07 13:14:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2019-10-07 13:14:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-07 13:14:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-07 13:14:41,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2019-10-07 13:14:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:14:41,401 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-07 13:14:41,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-07 13:14:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-07 13:14:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-07 13:14:41,402 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:14:41,402 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:14:41,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:14:41,610 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:14:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:14:41,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1091045630, now seen corresponding path program 1 times [2019-10-07 13:14:41,611 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:14:41,611 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:14:41,612 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:14:41,612 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:14:41,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:14:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:14:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:14:41,750 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:14:41,750 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:14:41,750 INFO L95 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 [2019-10-07 13:14:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:14:41,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-07 13:14:41,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:14:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:14:42,060 INFO L322 TraceCheckSpWp]: Computing backward predicates...