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_built_from_end.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:58:59,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:58:59,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:58:59,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:58:59,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:58:59,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:58:59,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:58:59,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:58:59,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:58:59,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:58:59,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:58:59,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:58:59,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:58:59,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:58:59,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:58:59,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:58:59,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:58:59,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:58:59,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:58:59,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:58:59,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:58:59,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:58:59,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:58:59,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:58:59,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 02:58:59,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 02:58:59,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 02:58:59,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 02:58:59,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 02:58:59,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 02:58:59,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 02:58:59,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 02:58:59,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 02:58:59,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 02:58:59,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 02:58:59,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 02:58:59,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 02:58:59,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 02:58:59,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:58:59,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:58:59,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:58:59,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 02:58:59,147 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:58:59,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:58:59,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:58:59,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:58:59,149 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:58:59,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:58:59,150 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:58:59,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:58:59,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:58:59,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:58:59,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:58:59,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:58:59,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:58:59,151 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:58:59,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:58:59,151 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:58:59,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:58:59,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:58:59,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:58:59,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:58:59,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:58:59,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:58:59,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:58:59,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:58:59,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:58:59,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:58:59,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:58:59,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:58:59,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 02:58:59,414 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:58:59,426 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:58:59,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:58:59,431 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:58:59,432 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:58:59,432 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i [2019-10-15 02:58:59,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb82b95b5/3e4efad074f946e29f71e6a3c502d2c6/FLAG5076ea34a [2019-10-15 02:59:00,085 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:59:00,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/simple_built_from_end.i [2019-10-15 02:59:00,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb82b95b5/3e4efad074f946e29f71e6a3c502d2c6/FLAG5076ea34a [2019-10-15 02:59:00,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb82b95b5/3e4efad074f946e29f71e6a3c502d2c6 [2019-10-15 02:59:00,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:59:00,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:59:00,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:59:00,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:59:00,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:59:00,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:00,407 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 15.10 02:59:00, skipping insertion in model container [2019-10-15 02:59:00,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:00,414 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:59:00,449 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:59:00,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:59:00,864 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:59:00,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:59:00,989 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:59:00,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00 WrapperNode [2019-10-15 02:59:00,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:59:00,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:59:00,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:59:00,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:59:01,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:01,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:01,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:01,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:01,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:01,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:01,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (1/1) ... [2019-10-15 02:59:01,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:59:01,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:59:01,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:59:01,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:59:01,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:59:01,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:59:01,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:59:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 02:59:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 02:59:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-15 02:59:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-15 02:59:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-15 02:59:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 02:59:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:59:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:59:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:59:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 02:59:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 02:59:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 02:59:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 02:59:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 02:59:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 02:59:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 02:59:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 02:59:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 02:59:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 02:59:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 02:59:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 02:59:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 02:59:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 02:59:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 02:59:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 02:59:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 02:59:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 02:59:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-15 02:59:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-15 02:59:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-15 02:59:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 02:59:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 02:59:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 02:59:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 02:59:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 02:59:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 02:59:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 02:59:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 02:59:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 02:59:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 02:59:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 02:59:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 02:59:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 02:59:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 02:59:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 02:59:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 02:59:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 02:59:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 02:59:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 02:59:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 02:59:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 02:59:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 02:59:01,135 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 02:59:01,135 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 02:59:01,135 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 02:59:01,135 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 02:59:01,135 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 02:59:01,135 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 02:59:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 02:59:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 02:59:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 02:59:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 02:59:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 02:59:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 02:59:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 02:59:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 02:59:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 02:59:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 02:59:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 02:59:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 02:59:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 02:59:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 02:59:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 02:59:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 02:59:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 02:59:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 02:59:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 02:59:01,139 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 02:59:01,139 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 02:59:01,139 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 02:59:01,139 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 02:59:01,139 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 02:59:01,139 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 02:59:01,139 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 02:59:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 02:59:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 02:59:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 02:59:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 02:59:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 02:59:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 02:59:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 02:59:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 02:59:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 02:59:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 02:59:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 02:59:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 02:59:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 02:59:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 02:59:01,142 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 02:59:01,142 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 02:59:01,142 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 02:59:01,142 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 02:59:01,142 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 02:59:01,142 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 02:59:01,142 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 02:59:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 02:59:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 02:59:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 02:59:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 02:59:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 02:59:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 02:59:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 02:59:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 02:59:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 02:59:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 02:59:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 02:59:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 02:59:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:59:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 02:59:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:59:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 02:59:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:59:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 02:59:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:59:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:59:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:59:01,532 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 02:59:01,702 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:59:01,703 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 02:59:01,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:59:01 BoogieIcfgContainer [2019-10-15 02:59:01,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:59:01,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:59:01,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:59:01,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:59:01,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:59:00" (1/3) ... [2019-10-15 02:59:01,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375b87bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:59:01, skipping insertion in model container [2019-10-15 02:59:01,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:59:00" (2/3) ... [2019-10-15 02:59:01,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375b87bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:59:01, skipping insertion in model container [2019-10-15 02:59:01,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:59:01" (3/3) ... [2019-10-15 02:59:01,713 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2019-10-15 02:59:01,723 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:59:01,732 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:59:01,743 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:59:01,766 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:59:01,766 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:59:01,767 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:59:01,767 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:59:01,767 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:59:01,767 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:59:01,767 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:59:01,767 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:59:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 02:59:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-15 02:59:01,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:01,788 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:01,790 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:01,795 INFO L82 PathProgramCache]: Analyzing trace with hash -493734478, now seen corresponding path program 1 times [2019-10-15 02:59:01,801 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:01,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236386628] [2019-10-15 02:59:01,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:01,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:01,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:01,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236386628] [2019-10-15 02:59:01,935 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:59:01,935 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 02:59:01,936 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868488340] [2019-10-15 02:59:01,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 02:59:01,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 02:59:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:59:01,956 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-15 02:59:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:01,973 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2019-10-15 02:59:01,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 02:59:01,974 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-15 02:59:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:01,983 INFO L225 Difference]: With dead ends: 28 [2019-10-15 02:59:01,983 INFO L226 Difference]: Without dead ends: 14 [2019-10-15 02:59:01,987 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:59:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-15 02:59:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-15 02:59:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 02:59:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-15 02:59:02,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-15 02:59:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:02,027 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-15 02:59:02,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 02:59:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-15 02:59:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 02:59:02,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:02,028 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:02,028 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1859619042, now seen corresponding path program 1 times [2019-10-15 02:59:02,029 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:02,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569566132] [2019-10-15 02:59:02,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:02,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:02,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:02,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569566132] [2019-10-15 02:59:02,120 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:59:02,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:59:02,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221966881] [2019-10-15 02:59:02,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:59:02,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:59:02,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:59:02,124 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-10-15 02:59:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:02,144 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-10-15 02:59:02,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:59:02,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 02:59:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:02,146 INFO L225 Difference]: With dead ends: 24 [2019-10-15 02:59:02,146 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 02:59:02,147 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:59:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 02:59:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-10-15 02:59:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 02:59:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 02:59:02,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2019-10-15 02:59:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:02,152 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 02:59:02,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:59:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 02:59:02,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 02:59:02,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:02,153 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:02,153 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:02,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1159508965, now seen corresponding path program 1 times [2019-10-15 02:59:02,154 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:02,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466899644] [2019-10-15 02:59:02,154 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:02,154 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:02,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:02,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466899644] [2019-10-15 02:59:02,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:59:02,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 02:59:02,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421371138] [2019-10-15 02:59:02,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 02:59:02,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:02,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 02:59:02,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 02:59:02,265 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2019-10-15 02:59:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:02,325 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-10-15 02:59:02,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 02:59:02,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 02:59:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:02,327 INFO L225 Difference]: With dead ends: 23 [2019-10-15 02:59:02,328 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 02:59:02,328 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:59:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 02:59:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-15 02:59:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 02:59:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-15 02:59:02,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-10-15 02:59:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:02,336 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-15 02:59:02,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 02:59:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-15 02:59:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 02:59:02,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:02,339 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:02,339 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1495193777, now seen corresponding path program 1 times [2019-10-15 02:59:02,340 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:02,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637875761] [2019-10-15 02:59:02,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:02,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:02,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:02,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637875761] [2019-10-15 02:59:02,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346038113] [2019-10-15 02:59:02,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:02,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 02:59:02,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:59:02,782 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 13 treesize of output 9 [2019-10-15 02:59:02,782 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:59:02,791 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:59:02,797 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 13 treesize of output 9 [2019-10-15 02:59:02,798 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 02:59:02,805 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:59:02,806 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:59:02,806 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-10-15 02:59:02,827 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 [2019-10-15 02:59:02,828 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:59:02,837 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:59:02,844 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 [2019-10-15 02:59:02,844 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 02:59:02,855 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:59:02,855 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:59:02,856 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-10-15 02:59:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:02,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:02,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294489621] [2019-10-15 02:59:02,919 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 02:59:02,919 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:59:02,926 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:59:02,935 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:59:02,936 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:59:03,112 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:59:04,035 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:59:04,040 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:59:04,405 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2019-10-15 02:59:04,602 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-10-15 02:59:04,606 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:59:04,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 8] total 13 [2019-10-15 02:59:04,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730791245] [2019-10-15 02:59:04,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 02:59:04,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:04,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 02:59:04,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-10-15 02:59:04,616 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 13 states. [2019-10-15 02:59:05,067 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2019-10-15 02:59:05,284 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2019-10-15 02:59:05,505 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2019-10-15 02:59:05,699 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2019-10-15 02:59:05,907 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2019-10-15 02:59:06,144 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2019-10-15 02:59:06,325 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2019-10-15 02:59:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:06,345 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-10-15 02:59:06,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 02:59:06,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-10-15 02:59:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:06,348 INFO L225 Difference]: With dead ends: 34 [2019-10-15 02:59:06,348 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 02:59:06,350 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2019-10-15 02:59:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 02:59:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-10-15 02:59:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 02:59:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-10-15 02:59:06,355 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2019-10-15 02:59:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:06,355 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-10-15 02:59:06,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 02:59:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-10-15 02:59:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 02:59:06,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:06,357 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:06,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:06,567 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash 553956184, now seen corresponding path program 2 times [2019-10-15 02:59:06,568 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:06,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164537793] [2019-10-15 02:59:06,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:06,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:06,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:06,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164537793] [2019-10-15 02:59:06,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733691061] [2019-10-15 02:59:06,819 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:06,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 02:59:06,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:59:06,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-15 02:59:06,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:59:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:07,187 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:07,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895251845] [2019-10-15 02:59:07,412 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 02:59:07,412 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:59:07,413 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:59:07,413 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:59:07,413 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:59:07,440 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:59:08,039 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:59:08,045 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:59:08,594 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-10-15 02:59:08,595 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:59:08,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 22 [2019-10-15 02:59:08,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247770188] [2019-10-15 02:59:08,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 02:59:08,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:08,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 02:59:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2019-10-15 02:59:08,598 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 22 states. [2019-10-15 02:59:08,837 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-10-15 02:59:09,029 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-10-15 02:59:09,236 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2019-10-15 02:59:09,416 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2019-10-15 02:59:09,557 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 43 [2019-10-15 02:59:09,697 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2019-10-15 02:59:10,002 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2019-10-15 02:59:10,162 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2019-10-15 02:59:10,342 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2019-10-15 02:59:10,639 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2019-10-15 02:59:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:10,711 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-10-15 02:59:10,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 02:59:10,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2019-10-15 02:59:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:10,713 INFO L225 Difference]: With dead ends: 30 [2019-10-15 02:59:10,713 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 02:59:10,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 02:59:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 02:59:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-10-15 02:59:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 02:59:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-15 02:59:10,721 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2019-10-15 02:59:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:10,721 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-15 02:59:10,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 02:59:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-15 02:59:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 02:59:10,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:10,722 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:10,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:10,927 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1649134676, now seen corresponding path program 3 times [2019-10-15 02:59:10,928 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:10,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10488430] [2019-10-15 02:59:10,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:10,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:10,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:11,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10488430] [2019-10-15 02:59:11,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37129024] [2019-10-15 02:59:11,207 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:11,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 02:59:11,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:59:11,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-15 02:59:11,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:59:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:11,905 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:12,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:12,975 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:335) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-15 02:59:12,981 INFO L168 Benchmark]: Toolchain (without parser) took 12586.83 ms. Allocated memory was 139.5 MB in the beginning and 329.3 MB in the end (delta: 189.8 MB). Free memory was 101.6 MB in the beginning and 190.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 101.4 MB. Max. memory is 7.1 GB. [2019-10-15 02:59:12,981 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-10-15 02:59:12,982 INFO L168 Benchmark]: CACSL2BoogieTranslator took 594.45 ms. Allocated memory was 139.5 MB in the beginning and 205.0 MB in the end (delta: 65.5 MB). Free memory was 101.4 MB in the beginning and 171.3 MB in the end (delta: -69.9 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2019-10-15 02:59:12,982 INFO L168 Benchmark]: Boogie Preprocessor took 64.70 ms. Allocated memory is still 205.0 MB. Free memory was 171.3 MB in the beginning and 168.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-10-15 02:59:12,983 INFO L168 Benchmark]: RCFGBuilder took 649.48 ms. Allocated memory is still 205.0 MB. Free memory was 168.7 MB in the beginning and 126.3 MB in the end (delta: 42.4 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2019-10-15 02:59:12,983 INFO L168 Benchmark]: TraceAbstraction took 11273.43 ms. Allocated memory was 205.0 MB in the beginning and 329.3 MB in the end (delta: 124.3 MB). Free memory was 125.7 MB in the beginning and 190.0 MB in the end (delta: -64.3 MB). Peak memory consumption was 59.9 MB. Max. memory is 7.1 GB. [2019-10-15 02:59:12,986 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 594.45 ms. Allocated memory was 139.5 MB in the beginning and 205.0 MB in the end (delta: 65.5 MB). Free memory was 101.4 MB in the beginning and 171.3 MB in the end (delta: -69.9 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.70 ms. Allocated memory is still 205.0 MB. Free memory was 171.3 MB in the beginning and 168.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 649.48 ms. Allocated memory is still 205.0 MB. Free memory was 168.7 MB in the beginning and 126.3 MB in the end (delta: 42.4 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11273.43 ms. Allocated memory was 205.0 MB in the beginning and 329.3 MB in the end (delta: 124.3 MB). Free memory was 125.7 MB in the beginning and 190.0 MB in the end (delta: -64.3 MB). Peak memory consumption was 59.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...