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-simple/sll2n_prepend_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:00:24,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:00:24,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:00:24,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:00:24,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:00:24,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:00:24,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:00:24,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:00:24,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:00:24,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:00:24,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:00:24,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:00:24,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:00:24,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:00:24,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:00:24,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:00:24,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:00:24,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:00:24,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:00:24,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:00:24,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:00:24,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:00:24,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:00:24,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:00:24,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:00:24,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:00:24,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:00:24,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:00:24,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:00:24,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:00:24,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:00:24,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:00:24,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:00:24,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:00:24,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:00:24,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:00:24,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:00:24,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:00:24,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:00:24,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:00:24,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:00:24,108 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 03:00:24,127 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:00:24,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:00:24,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:00:24,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:00:24,130 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:00:24,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:00:24,131 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:00:24,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:00:24,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:00:24,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:00:24,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:00:24,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:00:24,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:00:24,133 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:00:24,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:00:24,134 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:00:24,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:00:24,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:00:24,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:00:24,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:00:24,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:00:24,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:24,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:00:24,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:00:24,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:00:24,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:00:24,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:00:24,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:00:24,136 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 03:00:24,423 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:00:24,439 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:00:24,445 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:00:24,447 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:00:24,447 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:00:24,448 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_prepend_unequal.i [2019-10-15 03:00:24,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a4ad15b/71a2b0dbf58a4263942d0d5479c9adf6/FLAG916c0c9ac [2019-10-15 03:00:25,122 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:00:25,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_prepend_unequal.i [2019-10-15 03:00:25,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a4ad15b/71a2b0dbf58a4263942d0d5479c9adf6/FLAG916c0c9ac [2019-10-15 03:00:25,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a4ad15b/71a2b0dbf58a4263942d0d5479c9adf6 [2019-10-15 03:00:25,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:00:25,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:00:25,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:25,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:00:25,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:00:25,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:25" (1/1) ... [2019-10-15 03:00:25,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de122ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:25, skipping insertion in model container [2019-10-15 03:00:25,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:25" (1/1) ... [2019-10-15 03:00:25,421 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:00:25,482 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:00:25,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:25,941 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:00:25,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:26,058 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:00:26,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26 WrapperNode [2019-10-15 03:00:26,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:26,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:00:26,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:00:26,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:00:26,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (1/1) ... [2019-10-15 03:00:26,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (1/1) ... [2019-10-15 03:00:26,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (1/1) ... [2019-10-15 03:00:26,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (1/1) ... [2019-10-15 03:00:26,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (1/1) ... [2019-10-15 03:00:26,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (1/1) ... [2019-10-15 03:00:26,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (1/1) ... [2019-10-15 03:00:26,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:00:26,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:00:26,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:00:26,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:00:26,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (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 03:00:26,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:00:26,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:00:26,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 03:00:26,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 03:00:26,194 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 03:00:26,194 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-15 03:00:26,195 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-15 03:00:26,195 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-15 03:00:26,195 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_prepend [2019-10-15 03:00:26,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:00:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:00:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 03:00:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 03:00:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 03:00:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 03:00:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 03:00:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 03:00:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 03:00:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 03:00:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 03:00:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 03:00:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 03:00:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 03:00:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 03:00:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 03:00:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 03:00:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 03:00:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 03:00:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 03:00:26,199 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 03:00:26,199 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 03:00:26,199 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 03:00:26,199 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 03:00:26,199 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 03:00:26,200 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 03:00:26,200 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 03:00:26,200 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 03:00:26,200 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 03:00:26,200 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 03:00:26,200 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 03:00:26,201 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 03:00:26,201 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 03:00:26,201 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 03:00:26,201 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 03:00:26,201 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 03:00:26,201 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 03:00:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 03:00:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 03:00:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 03:00:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 03:00:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 03:00:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 03:00:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 03:00:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 03:00:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 03:00:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 03:00:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 03:00:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 03:00:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 03:00:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 03:00:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 03:00:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 03:00:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 03:00:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:00:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 03:00:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 03:00:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:00:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 03:00:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 03:00:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 03:00:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 03:00:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 03:00:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 03:00:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 03:00:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 03:00:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 03:00:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:00:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 03:00:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 03:00:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 03:00:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 03:00:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 03:00:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 03:00:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 03:00:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 03:00:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 03:00:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 03:00:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 03:00:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 03:00:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 03:00:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 03:00:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 03:00:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 03:00:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 03:00:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 03:00:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 03:00:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 03:00:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 03:00:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 03:00:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 03:00:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 03:00:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 03:00:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 03:00:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 03:00:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 03:00:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 03:00:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 03:00:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 03:00:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 03:00:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 03:00:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 03:00:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 03:00:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 03:00:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 03:00:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 03:00:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 03:00:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 03:00:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-15 03:00:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:00:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:00:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:00:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-15 03:00:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-15 03:00:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:00:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:00:26,219 INFO L130 BoogieDeclarations]: Found specification of procedure sll_prepend [2019-10-15 03:00:26,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:00:26,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:00:26,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-15 03:00:26,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:00:26,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:00:26,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:00:26,614 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 03:00:26,939 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:00:26,939 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:00:26,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:26 BoogieIcfgContainer [2019-10-15 03:00:26,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:00:26,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:00:26,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:00:26,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:00:26,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:00:25" (1/3) ... [2019-10-15 03:00:26,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5623f71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:26, skipping insertion in model container [2019-10-15 03:00:26,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:26" (2/3) ... [2019-10-15 03:00:26,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5623f71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:26, skipping insertion in model container [2019-10-15 03:00:26,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:26" (3/3) ... [2019-10-15 03:00:26,961 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2019-10-15 03:00:26,972 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:00:26,983 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:00:26,994 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:00:27,020 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:00:27,021 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:00:27,021 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:00:27,021 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:00:27,021 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:00:27,022 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:00:27,022 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:00:27,022 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:00:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-10-15 03:00:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 03:00:27,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:27,050 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:27,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash 219491985, now seen corresponding path program 1 times [2019-10-15 03:00:27,067 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:27,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455916033] [2019-10-15 03:00:27,068 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:27,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:27,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:27,323 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 03:00:27,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455916033] [2019-10-15 03:00:27,325 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:27,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:00:27,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466470754] [2019-10-15 03:00:27,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:00:27,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:00:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:00:27,350 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 5 states. [2019-10-15 03:00:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:27,478 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2019-10-15 03:00:27,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:00:27,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-15 03:00:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:27,498 INFO L225 Difference]: With dead ends: 73 [2019-10-15 03:00:27,498 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 03:00:27,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:00:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 03:00:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-15 03:00:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:00:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 03:00:27,556 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2019-10-15 03:00:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:27,556 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 03:00:27,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:00:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 03:00:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:00:27,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:27,559 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:27,559 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash -979574963, now seen corresponding path program 1 times [2019-10-15 03:00:27,560 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:27,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016893335] [2019-10-15 03:00:27,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:27,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:27,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:00:27,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016893335] [2019-10-15 03:00:27,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443839387] [2019-10-15 03:00:27,724 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 03:00:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:27,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:00:27,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:27,965 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:00:28,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1494871411] [2019-10-15 03:00:28,171 INFO L162 IcfgInterpreter]: Started Sifa with 25 locations of interest [2019-10-15 03:00:28,171 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:28,179 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:28,194 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:28,195 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:28,360 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:00:28,564 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:30,660 INFO L199 IcfgInterpreter]: Interpreting procedure sll_prepend with input of size 41 for LOIs [2019-10-15 03:00:30,867 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 44 for LOIs [2019-10-15 03:00:32,455 INFO L199 IcfgInterpreter]: Interpreting procedure node_create with input of size 40 for LOIs [2019-10-15 03:00:32,511 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:00:32,514 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:00:35,877 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2019-10-15 03:00:36,105 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2019-10-15 03:00:36,318 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-10-15 03:00:36,594 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:00:36,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 22] total 29 [2019-10-15 03:00:36,595 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409339553] [2019-10-15 03:00:36,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 03:00:36,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 03:00:36,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=725, Unknown=1, NotChecked=0, Total=812 [2019-10-15 03:00:36,600 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2019-10-15 03:00:44,231 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-10-15 03:00:44,471 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2019-10-15 03:00:44,829 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2019-10-15 03:00:45,039 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-10-15 03:00:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:45,317 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-10-15 03:00:45,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-15 03:00:45,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2019-10-15 03:00:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:45,320 INFO L225 Difference]: With dead ends: 54 [2019-10-15 03:00:45,320 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:00:45,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=256, Invalid=2291, Unknown=3, NotChecked=0, Total=2550 [2019-10-15 03:00:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:00:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-10-15 03:00:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 03:00:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-15 03:00:45,331 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 29 [2019-10-15 03:00:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:45,331 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-15 03:00:45,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 03:00:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-15 03:00:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 03:00:45,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:45,333 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:45,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:45,540 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash -814996719, now seen corresponding path program 2 times [2019-10-15 03:00:45,541 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:45,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567027388] [2019-10-15 03:00:45,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:45,544 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:45,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:00:45,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567027388] [2019-10-15 03:00:45,860 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:45,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-15 03:00:45,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248516233] [2019-10-15 03:00:45,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 03:00:45,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 03:00:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:00:45,861 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 10 states. [2019-10-15 03:00:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:46,126 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-15 03:00:46,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 03:00:46,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2019-10-15 03:00:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:46,128 INFO L225 Difference]: With dead ends: 34 [2019-10-15 03:00:46,128 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 03:00:46,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-15 03:00:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 03:00:46,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 03:00:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 03:00:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-15 03:00:46,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 36 [2019-10-15 03:00:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:46,138 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-15 03:00:46,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 03:00:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-15 03:00:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 03:00:46,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:46,139 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:46,140 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1527752564, now seen corresponding path program 1 times [2019-10-15 03:00:46,140 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:46,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207777910] [2019-10-15 03:00:46,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:46,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:46,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:00:47,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207777910] [2019-10-15 03:00:47,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397597583] [2019-10-15 03:00:47,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:47,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 105 conjunts are in the unsatisfiable core [2019-10-15 03:00:47,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:52,177 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 40 [2019-10-15 03:00:56,272 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 46 [2019-10-15 03:01:06,829 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-10-15 03:01:07,009 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2019-10-15 03:01:07,353 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2019-10-15 03:01:07,591 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2019-10-15 03:01:07,797 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2019-10-15 03:01:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:01:08,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:09,022 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-15 03:01:09,146 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 78