/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:54:00,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:54:00,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:54:00,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:54:00,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:54:00,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:54:00,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:54:00,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:54:00,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:54:00,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:54:00,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:54:00,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:54:00,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:54:00,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:54:00,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:54:00,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:54:00,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:54:00,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:54:00,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:54:00,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:54:01,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:54:01,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:54:01,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:54:01,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:54:01,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 03:54:01,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 03:54:01,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 03:54:01,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 03:54:01,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 03:54:01,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 03:54:01,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 03:54:01,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 03:54:01,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 03:54:01,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 03:54:01,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 03:54:01,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 03:54:01,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 03:54:01,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 03:54:01,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:54:01,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:54:01,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:54:01,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 03:54:01,046 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:54:01,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:54:01,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:54:01,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:54:01,048 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:54:01,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:54:01,049 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:54:01,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:54:01,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:54:01,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:54:01,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:54:01,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:54:01,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:54:01,050 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:54:01,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:54:01,050 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:54:01,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:54:01,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:54:01,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:54:01,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:54:01,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:54:01,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:54:01,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:54:01,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:54:01,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:54:01,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:54:01,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:54:01,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:54:01,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 03:54:01,328 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:54:01,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:54:01,344 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:54:01,345 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:54:01,346 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:54:01,346 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2019-11-07 03:54:01,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c2498dc1/6343cf9d8074415db713a542d627c8ed/FLAG491edca9c [2019-11-07 03:54:01,967 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:54:01,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2019-11-07 03:54:01,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c2498dc1/6343cf9d8074415db713a542d627c8ed/FLAG491edca9c [2019-11-07 03:54:02,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c2498dc1/6343cf9d8074415db713a542d627c8ed [2019-11-07 03:54:02,272 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:54:02,273 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:54:02,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:54:02,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:54:02,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:54:02,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:02,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f36c495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02, skipping insertion in model container [2019-11-07 03:54:02,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:02,290 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:54:02,350 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:54:02,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:54:02,861 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:54:02,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:54:02,959 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:54:02,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02 WrapperNode [2019-11-07 03:54:02,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:54:02,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:54:02,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:54:02,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:54:02,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:02,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:02,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:02,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:03,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:03,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:03,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (1/1) ... [2019-11-07 03:54:03,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:54:03,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:54:03,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:54:03,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:54:03,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:54:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:54:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:54:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-07 03:54:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-07 03:54:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-07 03:54:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:54:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:54:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 03:54:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 03:54:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 03:54:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 03:54:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 03:54:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 03:54:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 03:54:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 03:54:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 03:54:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 03:54:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 03:54:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 03:54:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 03:54:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 03:54:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 03:54:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 03:54:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 03:54:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-07 03:54:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-07 03:54:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 03:54:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 03:54:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 03:54:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 03:54:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 03:54:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 03:54:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 03:54:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 03:54:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 03:54:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 03:54:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 03:54:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 03:54:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 03:54:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 03:54:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 03:54:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 03:54:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 03:54:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 03:54:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 03:54:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 03:54:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 03:54:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 03:54:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 03:54:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 03:54:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 03:54:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 03:54:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 03:54:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 03:54:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 03:54:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 03:54:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-07 03:54:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 03:54:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 03:54:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 03:54:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-07 03:54:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 03:54:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 03:54:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-07 03:54:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 03:54:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 03:54:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-07 03:54:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 03:54:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 03:54:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 03:54:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 03:54:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 03:54:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 03:54:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 03:54:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 03:54:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 03:54:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 03:54:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 03:54:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 03:54:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 03:54:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 03:54:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 03:54:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 03:54:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 03:54:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 03:54:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 03:54:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 03:54:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 03:54:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 03:54:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 03:54:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 03:54:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 03:54:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 03:54:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 03:54:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 03:54:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 03:54:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 03:54:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 03:54:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 03:54:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 03:54:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 03:54:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 03:54:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 03:54:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 03:54:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 03:54:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-07 03:54:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:54:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 03:54:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 03:54:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 03:54:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:54:03,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:54:03,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:54:03,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:54:03,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:54:03,451 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-07 03:54:04,601 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:54:04,602 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-07 03:54:04,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:04 BoogieIcfgContainer [2019-11-07 03:54:04,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:54:04,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:54:04,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:54:04,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:54:04,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:54:02" (1/3) ... [2019-11-07 03:54:04,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6365de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:04, skipping insertion in model container [2019-11-07 03:54:04,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:02" (2/3) ... [2019-11-07 03:54:04,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6365de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:04, skipping insertion in model container [2019-11-07 03:54:04,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:04" (3/3) ... [2019-11-07 03:54:04,612 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2019-11-07 03:54:04,622 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:54:04,631 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:54:04,642 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:54:04,669 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:54:04,670 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:54:04,670 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:54:04,670 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:54:04,670 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:54:04,671 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:54:04,671 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:54:04,671 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:54:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-11-07 03:54:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 03:54:04,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:04,697 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:04,699 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1613074857, now seen corresponding path program 1 times [2019-11-07 03:54:04,715 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:04,716 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453973091] [2019-11-07 03:54:04,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:04,873 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453973091] [2019-11-07 03:54:04,874 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:04,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 03:54:04,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549922264] [2019-11-07 03:54:04,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 03:54:04,882 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:04,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 03:54:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 03:54:04,897 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2019-11-07 03:54:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:04,923 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2019-11-07 03:54:04,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 03:54:04,924 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-11-07 03:54:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:04,932 INFO L225 Difference]: With dead ends: 81 [2019-11-07 03:54:04,933 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 03:54:04,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 03:54:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 03:54:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-07 03:54:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-07 03:54:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-11-07 03:54:04,978 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 18 [2019-11-07 03:54:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:04,978 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-11-07 03:54:04,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 03:54:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-11-07 03:54:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 03:54:04,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:04,980 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:04,980 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:04,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1270740144, now seen corresponding path program 1 times [2019-11-07 03:54:04,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:04,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283268122] [2019-11-07 03:54:04,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:05,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283268122] [2019-11-07 03:54:05,056 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:05,056 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:54:05,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929049846] [2019-11-07 03:54:05,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:54:05,058 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:05,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:54:05,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:54:05,059 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 3 states. [2019-11-07 03:54:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:05,095 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2019-11-07 03:54:05,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:54:05,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-07 03:54:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:05,098 INFO L225 Difference]: With dead ends: 57 [2019-11-07 03:54:05,099 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 03:54:05,100 INFO L630 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 [2019-11-07 03:54:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 03:54:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-07 03:54:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-07 03:54:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2019-11-07 03:54:05,114 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2019-11-07 03:54:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:05,116 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2019-11-07 03:54:05,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:54:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2019-11-07 03:54:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-07 03:54:05,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:05,117 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:05,118 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:05,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1872294584, now seen corresponding path program 1 times [2019-11-07 03:54:05,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:05,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358384150] [2019-11-07 03:54:05,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:05,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358384150] [2019-11-07 03:54:05,258 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:05,258 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:54:05,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512298523] [2019-11-07 03:54:05,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:54:05,259 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:54:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:54:05,261 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 5 states. [2019-11-07 03:54:05,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:05,433 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2019-11-07 03:54:05,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:54:05,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-07 03:54:05,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:05,437 INFO L225 Difference]: With dead ends: 60 [2019-11-07 03:54:05,437 INFO L226 Difference]: Without dead ends: 56 [2019-11-07 03:54:05,438 INFO L630 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 [2019-11-07 03:54:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-07 03:54:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2019-11-07 03:54:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-07 03:54:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-11-07 03:54:05,446 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 27 [2019-11-07 03:54:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:05,447 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-11-07 03:54:05,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:54:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-11-07 03:54:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 03:54:05,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:05,448 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:05,448 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash -267521581, now seen corresponding path program 1 times [2019-11-07 03:54:05,449 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:05,449 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134120421] [2019-11-07 03:54:05,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:05,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134120421] [2019-11-07 03:54:05,521 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:05,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:54:05,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658404103] [2019-11-07 03:54:05,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:54:05,522 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:54:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:54:05,523 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 5 states. [2019-11-07 03:54:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:05,683 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2019-11-07 03:54:05,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:54:05,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-07 03:54:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:05,687 INFO L225 Difference]: With dead ends: 62 [2019-11-07 03:54:05,687 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 03:54:05,688 INFO L630 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 [2019-11-07 03:54:05,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 03:54:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2019-11-07 03:54:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-07 03:54:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-11-07 03:54:05,695 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 29 [2019-11-07 03:54:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:05,695 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-11-07 03:54:05,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:54:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-11-07 03:54:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 03:54:05,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:05,697 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:05,697 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash 757181395, now seen corresponding path program 1 times [2019-11-07 03:54:05,698 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:05,698 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357576432] [2019-11-07 03:54:05,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:05,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357576432] [2019-11-07 03:54:05,789 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:05,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:54:05,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947766866] [2019-11-07 03:54:05,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:54:05,791 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:54:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:54:05,793 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 5 states. [2019-11-07 03:54:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:05,950 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2019-11-07 03:54:05,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:54:05,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-07 03:54:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:05,954 INFO L225 Difference]: With dead ends: 62 [2019-11-07 03:54:05,954 INFO L226 Difference]: Without dead ends: 51 [2019-11-07 03:54:05,957 INFO L630 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 [2019-11-07 03:54:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-07 03:54:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2019-11-07 03:54:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-07 03:54:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-11-07 03:54:05,969 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 29 [2019-11-07 03:54:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:05,970 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-11-07 03:54:05,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:54:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-11-07 03:54:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-07 03:54:05,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:05,972 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:05,973 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1251181087, now seen corresponding path program 1 times [2019-11-07 03:54:05,974 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:05,974 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703119194] [2019-11-07 03:54:05,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:06,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703119194] [2019-11-07 03:54:06,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144186672] [2019-11-07 03:54:06,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:06,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 03:54:06,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:54:06,455 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 [2019-11-07 03:54:06,456 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,459 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:06,460 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,460 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-07 03:54:06,488 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:06,489 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2019-11-07 03:54:06,490 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,500 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:06,507 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2019-11-07 03:54:06,508 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,518 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:06,519 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,519 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:18 [2019-11-07 03:54:06,548 INFO L341 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2019-11-07 03:54:06,549 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2019-11-07 03:54:06,549 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,559 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:06,559 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2019-11-07 03:54:06,585 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-07 03:54:06,587 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,594 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:06,595 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-07 03:54:06,595 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2019-11-07 03:54:06,642 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 10 [2019-11-07 03:54:06,643 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,659 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:06,660 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,660 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2019-11-07 03:54:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:06,667 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:54:06,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:06,730 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,732 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 03:54:06,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:06,747 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-07 03:54:06,748 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:54, output treesize:22 [2019-11-07 03:54:06,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:06,804 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 170 treesize of output 162 [2019-11-07 03:54:06,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:06,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:06,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:06,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 03:54:06,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:06,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:06,815 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:06,918 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2019-11-07 03:54:06,918 INFO L567 ElimStorePlain]: treesize reduction 307, result has 10.2 percent of original size [2019-11-07 03:54:06,922 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-07 03:54:06,923 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:21 [2019-11-07 03:54:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:07,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1122441008] [2019-11-07 03:54:07,116 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2019-11-07 03:54:07,117 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:54:07,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:54:07,132 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:54:07,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:54:07,236 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:54:08,392 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:08,520 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:08,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:54:08,979 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:54:10,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:54:10,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 21] total 33 [2019-11-07 03:54:10,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856026588] [2019-11-07 03:54:10,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-07 03:54:10,043 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:10,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-07 03:54:10,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2019-11-07 03:54:10,045 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 33 states. [2019-11-07 03:54:13,880 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-11-07 03:54:14,115 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-11-07 03:54:14,319 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2019-11-07 03:54:14,729 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2019-11-07 03:54:14,914 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-11-07 03:54:15,137 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-11-07 03:54:15,494 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2019-11-07 03:54:15,797 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-11-07 03:54:16,267 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2019-11-07 03:54:16,708 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2019-11-07 03:54:17,001 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-11-07 03:54:17,319 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-11-07 03:54:17,518 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2019-11-07 03:54:17,701 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2019-11-07 03:54:17,910 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2019-11-07 03:54:18,089 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2019-11-07 03:54:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:18,093 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2019-11-07 03:54:18,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-07 03:54:18,094 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 31 [2019-11-07 03:54:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:18,096 INFO L225 Difference]: With dead ends: 110 [2019-11-07 03:54:18,096 INFO L226 Difference]: Without dead ends: 102 [2019-11-07 03:54:18,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=602, Invalid=3820, Unknown=0, NotChecked=0, Total=4422 [2019-11-07 03:54:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-07 03:54:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 48. [2019-11-07 03:54:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-07 03:54:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2019-11-07 03:54:18,108 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 31 [2019-11-07 03:54:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:18,109 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2019-11-07 03:54:18,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-07 03:54:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2019-11-07 03:54:18,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-07 03:54:18,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:18,110 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:18,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:18,312 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:18,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2114582751, now seen corresponding path program 1 times [2019-11-07 03:54:18,313 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:18,313 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858511855] [2019-11-07 03:54:18,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:18,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858511855] [2019-11-07 03:54:18,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743512068] [2019-11-07 03:54:18,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:18,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 03:54:18,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:54:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:18,772 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:54:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:18,932 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489096880] [2019-11-07 03:54:18,934 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2019-11-07 03:54:18,934 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:54:18,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:54:18,935 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:54:18,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:54:18,967 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:54:19,764 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:19,851 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:19,945 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:20,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:54:20,075 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:54:21,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:54:21,202 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 20] total 32 [2019-11-07 03:54:21,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27197670] [2019-11-07 03:54:21,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-07 03:54:21,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-07 03:54:21,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2019-11-07 03:54:21,205 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 32 states. [2019-11-07 03:54:24,634 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-11-07 03:54:25,073 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-11-07 03:54:25,340 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2019-11-07 03:54:25,587 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-11-07 03:54:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:26,672 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2019-11-07 03:54:26,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 03:54:26,673 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2019-11-07 03:54:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:26,675 INFO L225 Difference]: With dead ends: 83 [2019-11-07 03:54:26,675 INFO L226 Difference]: Without dead ends: 77 [2019-11-07 03:54:26,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=344, Invalid=2412, Unknown=0, NotChecked=0, Total=2756 [2019-11-07 03:54:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-07 03:54:26,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2019-11-07 03:54:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 03:54:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2019-11-07 03:54:26,685 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 31 [2019-11-07 03:54:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:26,685 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2019-11-07 03:54:26,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-07 03:54:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2019-11-07 03:54:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-07 03:54:26,686 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:26,686 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:26,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:26,890 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:26,891 INFO L82 PathProgramCache]: Analyzing trace with hash -157138054, now seen corresponding path program 1 times [2019-11-07 03:54:26,891 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:26,891 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844015132] [2019-11-07 03:54:26,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:27,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844015132] [2019-11-07 03:54:27,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813310600] [2019-11-07 03:54:27,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:27,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-07 03:54:27,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:54:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:27,468 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:54:28,002 WARN L191 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2019-11-07 03:54:28,209 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2019-11-07 03:54:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:54:28,481 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211850899] [2019-11-07 03:54:28,483 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2019-11-07 03:54:28,484 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:54:28,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:54:28,485 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:54:28,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:54:28,515 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:54:29,342 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:29,416 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:54:29,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:54:29,900 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:54:31,244 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:54:31,245 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9, 20] total 38 [2019-11-07 03:54:31,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782058814] [2019-11-07 03:54:31,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-07 03:54:31,246 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:31,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-07 03:54:31,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 03:54:31,250 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 38 states. [2019-11-07 03:54:37,169 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2019-11-07 03:54:37,446 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2019-11-07 03:54:37,775 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2019-11-07 03:54:38,095 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2019-11-07 03:54:38,230 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2019-11-07 03:54:38,485 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-11-07 03:54:38,660 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2019-11-07 03:54:38,920 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-11-07 03:54:39,284 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2019-11-07 03:54:39,488 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2019-11-07 03:54:39,911 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2019-11-07 03:54:40,364 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2019-11-07 03:54:40,565 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-11-07 03:54:40,743 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2019-11-07 03:54:40,945 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2019-11-07 03:54:41,431 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-11-07 03:54:41,902 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-11-07 03:54:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:42,223 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2019-11-07 03:54:42,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-07 03:54:42,224 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 33 [2019-11-07 03:54:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:42,226 INFO L225 Difference]: With dead ends: 115 [2019-11-07 03:54:42,226 INFO L226 Difference]: Without dead ends: 100 [2019-11-07 03:54:42,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=776, Invalid=5386, Unknown=0, NotChecked=0, Total=6162 [2019-11-07 03:54:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-07 03:54:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 63. [2019-11-07 03:54:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-07 03:54:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2019-11-07 03:54:42,238 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 33 [2019-11-07 03:54:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:42,239 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2019-11-07 03:54:42,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-07 03:54:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2019-11-07 03:54:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-07 03:54:42,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:42,240 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:42,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:42,444 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1879319765, now seen corresponding path program 1 times [2019-11-07 03:54:42,444 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:42,444 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601261054] [2019-11-07 03:54:42,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY