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/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:41,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:41,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:41,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:41,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:41,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:41,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:41,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:41,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:41,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:41,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:41,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:41,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:41,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:41,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:41,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:41,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:41,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:41,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:41,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:41,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:41,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:41,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:41,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:41,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:31:41,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:31:41,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:31:41,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:31:41,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:31:41,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:31:41,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:31:41,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:31:41,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:31:41,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:31:41,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:31:41,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:31:41,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:31:41,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:31:41,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:41,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:41,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:41,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:31:41,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:41,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:41,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:41,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:41,981 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:41,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:41,982 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:41,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:41,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:41,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:41,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:41,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:41,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:41,983 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:41,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:41,984 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:41,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:41,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:41,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:41,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:41,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:41,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:41,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:41,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:41,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:41,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:41,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:41,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:41,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:31:42,281 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:42,294 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:42,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:42,299 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:42,300 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:42,300 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2019-10-15 01:31:42,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783c19132/aad8477dfa644d2c8b54bc051bacaa87/FLAGd3ddcb81a [2019-10-15 01:31:42,890 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:42,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i [2019-10-15 01:31:42,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783c19132/aad8477dfa644d2c8b54bc051bacaa87/FLAGd3ddcb81a [2019-10-15 01:31:43,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783c19132/aad8477dfa644d2c8b54bc051bacaa87 [2019-10-15 01:31:43,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:43,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:43,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:43,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:43,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:43,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ebb8931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43, skipping insertion in model container [2019-10-15 01:31:43,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,210 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:43,250 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:43,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:43,688 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:43,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:43,801 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:43,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43 WrapperNode [2019-10-15 01:31:43,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:43,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:43,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:43,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:43,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (1/1) ... [2019-10-15 01:31:43,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:43,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:43,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:43,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:43,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:43,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 01:31:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 01:31:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2019-10-15 01:31:43,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-15 01:31:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:31:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 01:31:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 01:31:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 01:31:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 01:31:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 01:31:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 01:31:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 01:31:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 01:31:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 01:31:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 01:31:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 01:31:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 01:31:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 01:31:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 01:31:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 01:31:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 01:31:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 01:31:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 01:31:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 01:31:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 01:31:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 01:31:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 01:31:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 01:31:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 01:31:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 01:31:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 01:31:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 01:31:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 01:31:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 01:31:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 01:31:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 01:31:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 01:31:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 01:31:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 01:31:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 01:31:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 01:31:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 01:31:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 01:31:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 01:31:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 01:31:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 01:31:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 01:31:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 01:31:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 01:31:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 01:31:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 01:31:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 01:31:43,951 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 01:31:43,951 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 01:31:43,951 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 01:31:43,951 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 01:31:43,951 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 01:31:43,951 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:31:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 01:31:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 01:31:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:31:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 01:31:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 01:31:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 01:31:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 01:31:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 01:31:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 01:31:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 01:31:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:31:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 01:31:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 01:31:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 01:31:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 01:31:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 01:31:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 01:31:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 01:31:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 01:31:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 01:31:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 01:31:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 01:31:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 01:31:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 01:31:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 01:31:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 01:31:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 01:31:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 01:31:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 01:31:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 01:31:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 01:31:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 01:31:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 01:31:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 01:31:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 01:31:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 01:31:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 01:31:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 01:31:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 01:31:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 01:31:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 01:31:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 01:31:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 01:31:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 01:31:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 01:31:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 01:31:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 01:31:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 01:31:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 01:31:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2019-10-15 01:31:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:31:43,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:43,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:43,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:43,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:44,701 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:44,702 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 01:31:44,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:44 BoogieIcfgContainer [2019-10-15 01:31:44,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:44,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:44,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:44,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:44,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:43" (1/3) ... [2019-10-15 01:31:44,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6661f1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:44, skipping insertion in model container [2019-10-15 01:31:44,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:43" (2/3) ... [2019-10-15 01:31:44,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6661f1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:44, skipping insertion in model container [2019-10-15 01:31:44,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:44" (3/3) ... [2019-10-15 01:31:44,713 INFO L109 eAbstractionObserver]: Analyzing ICFG relax-2.i [2019-10-15 01:31:44,723 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:44,732 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:44,744 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:44,768 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:44,769 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:44,769 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:44,770 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:44,771 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:44,771 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:44,778 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:44,779 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-15 01:31:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:31:44,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:44,811 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:44,813 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash -79995857, now seen corresponding path program 1 times [2019-10-15 01:31:44,830 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:44,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202866052] [2019-10-15 01:31:44,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:44,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:44,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:45,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202866052] [2019-10-15 01:31:45,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:45,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:31:45,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815364690] [2019-10-15 01:31:45,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:31:45,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:31:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:45,161 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2019-10-15 01:31:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:45,224 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2019-10-15 01:31:45,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:45,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-15 01:31:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:45,242 INFO L225 Difference]: With dead ends: 61 [2019-10-15 01:31:45,242 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:31:45,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:31:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-15 01:31:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-15 01:31:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2019-10-15 01:31:45,308 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2019-10-15 01:31:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:45,309 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2019-10-15 01:31:45,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:31:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2019-10-15 01:31:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:31:45,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:45,311 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:45,312 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1718639790, now seen corresponding path program 1 times [2019-10-15 01:31:45,313 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:45,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355318725] [2019-10-15 01:31:45,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:45,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355318725] [2019-10-15 01:31:45,515 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:45,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:31:45,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185085145] [2019-10-15 01:31:45,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:31:45,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:45,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:31:45,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:31:45,524 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 6 states. [2019-10-15 01:31:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:45,665 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2019-10-15 01:31:45,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:31:45,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-15 01:31:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:45,670 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:31:45,670 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:31:45,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:31:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:31:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-10-15 01:31:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:31:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2019-10-15 01:31:45,693 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2019-10-15 01:31:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:45,694 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2019-10-15 01:31:45,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:31:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2019-10-15 01:31:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:31:45,697 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:45,697 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:45,698 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash -912243692, now seen corresponding path program 1 times [2019-10-15 01:31:45,699 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:45,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380639363] [2019-10-15 01:31:45,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:46,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380639363] [2019-10-15 01:31:46,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643723258] [2019-10-15 01:31:46,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:46,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:31:46,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:46,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:31:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:46,334 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:46,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848234413] [2019-10-15 01:31:46,760 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:31:46,760 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:46,767 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:46,775 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:46,776 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:46,968 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:47,222 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:47,259 INFO L199 IcfgInterpreter]: Interpreting procedure is_relaxed_prefix with input of size 12 for LOIs [2019-10-15 01:31:47,333 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:47,339 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:48,235 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:48,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 15] total 32 [2019-10-15 01:31:48,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390835134] [2019-10-15 01:31:48,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:31:48,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:48,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:31:48,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:31:48,238 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 32 states. [2019-10-15 01:31:49,955 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2019-10-15 01:32:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:02,074 INFO L93 Difference]: Finished difference Result 160 states and 239 transitions. [2019-10-15 01:32:02,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-15 01:32:02,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 19 [2019-10-15 01:32:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:02,082 INFO L225 Difference]: With dead ends: 160 [2019-10-15 01:32:02,082 INFO L226 Difference]: Without dead ends: 117 [2019-10-15 01:32:02,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=473, Invalid=3433, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 01:32:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-15 01:32:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 63. [2019-10-15 01:32:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-15 01:32:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2019-10-15 01:32:02,117 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 19 [2019-10-15 01:32:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:02,118 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2019-10-15 01:32:02,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:32:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2019-10-15 01:32:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:32:02,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:02,119 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:02,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:02,321 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1553628473, now seen corresponding path program 1 times [2019-10-15 01:32:02,322 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:02,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21175951] [2019-10-15 01:32:02,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:02,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:02,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:32:02,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21175951] [2019-10-15 01:32:02,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:02,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:32:02,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795852532] [2019-10-15 01:32:02,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:32:02,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:02,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:32:02,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:32:02,406 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand 6 states. [2019-10-15 01:32:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:02,504 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2019-10-15 01:32:02,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:32:02,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-15 01:32:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:02,507 INFO L225 Difference]: With dead ends: 81 [2019-10-15 01:32:02,507 INFO L226 Difference]: Without dead ends: 70 [2019-10-15 01:32:02,508 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:32:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-15 01:32:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-10-15 01:32:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-15 01:32:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2019-10-15 01:32:02,521 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 19 [2019-10-15 01:32:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:02,522 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2019-10-15 01:32:02,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:32:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2019-10-15 01:32:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:32:02,523 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:02,524 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] [2019-10-15 01:32:02,524 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash 782103735, now seen corresponding path program 1 times [2019-10-15 01:32:02,524 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:02,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663352768] [2019-10-15 01:32:02,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:02,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:02,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:32:02,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663352768] [2019-10-15 01:32:02,671 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:02,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 01:32:02,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589081221] [2019-10-15 01:32:02,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:32:02,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:32:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:32:02,673 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand 8 states. [2019-10-15 01:32:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:02,896 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2019-10-15 01:32:02,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:32:02,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-10-15 01:32:02,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:02,900 INFO L225 Difference]: With dead ends: 82 [2019-10-15 01:32:02,900 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:32:02,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:32:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:32:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-15 01:32:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:32:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2019-10-15 01:32:02,914 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 20 [2019-10-15 01:32:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:02,915 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2019-10-15 01:32:02,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:32:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2019-10-15 01:32:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:32:02,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:02,916 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:02,916 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1211472267, now seen corresponding path program 1 times [2019-10-15 01:32:02,917 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:02,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251997006] [2019-10-15 01:32:02,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:02,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:02,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:03,246 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 01:32:03,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251997006] [2019-10-15 01:32:03,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672583294] [2019-10-15 01:32:03,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:03,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-15 01:32:03,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:32:03,519 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:03,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876608845] [2019-10-15 01:32:03,864 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:32:03,864 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:03,865 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:03,865 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:03,865 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:03,899 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:04,174 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:32:04,192 INFO L199 IcfgInterpreter]: Interpreting procedure is_relaxed_prefix with input of size 10 for LOIs [2019-10-15 01:32:04,216 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:04,220 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:04,915 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:04,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9, 14] total 36 [2019-10-15 01:32:04,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172399926] [2019-10-15 01:32:04,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-15 01:32:04,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:04,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-15 01:32:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:32:04,919 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand 36 states. [2019-10-15 01:32:06,599 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2019-10-15 01:32:07,439 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2019-10-15 01:32:09,453 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2019-10-15 01:32:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:10,302 INFO L93 Difference]: Finished difference Result 156 states and 235 transitions. [2019-10-15 01:32:10,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-15 01:32:10,303 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 21 [2019-10-15 01:32:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:10,305 INFO L225 Difference]: With dead ends: 156 [2019-10-15 01:32:10,305 INFO L226 Difference]: Without dead ends: 125 [2019-10-15 01:32:10,308 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=561, Invalid=4409, Unknown=0, NotChecked=0, Total=4970 [2019-10-15 01:32:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-15 01:32:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 54. [2019-10-15 01:32:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:32:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2019-10-15 01:32:10,322 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 21 [2019-10-15 01:32:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:10,323 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2019-10-15 01:32:10,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-15 01:32:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2019-10-15 01:32:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:32:10,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:10,324 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:10,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:10,528 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:10,529 INFO L82 PathProgramCache]: Analyzing trace with hash -820718679, now seen corresponding path program 1 times [2019-10-15 01:32:10,529 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:10,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186534403] [2019-10-15 01:32:10,530 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,530 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:10,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186534403] [2019-10-15 01:32:10,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69453954] [2019-10-15 01:32:10,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:10,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 01:32:10,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:11,150 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:11,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419184420] [2019-10-15 01:32:11,849 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:32:11,849 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:11,850 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:11,850 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:11,850 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:11,878 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:12,236 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:32:12,251 INFO L199 IcfgInterpreter]: Interpreting procedure is_relaxed_prefix with input of size 10 for LOIs [2019-10-15 01:32:12,322 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:12,326 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:13,007 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:13,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10, 13] total 35 [2019-10-15 01:32:13,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762717545] [2019-10-15 01:32:13,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:32:13,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:32:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1084, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:32:13,010 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 35 states. [2019-10-15 01:32:26,517 WARN L191 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 48