/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:20:03,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:20:03,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:20:03,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:20:03,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:20:03,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:20:03,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:20:03,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:20:03,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:20:03,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:20:03,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:20:03,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:20:03,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:20:03,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:20:03,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:20:03,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:20:03,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:20:03,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:20:03,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:20:03,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:20:03,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:20:03,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:20:03,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:20:03,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:20:03,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 01:20:03,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 01:20:03,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 01:20:03,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 01:20:03,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 01:20:03,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 01:20:03,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:20:03,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:20:03,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:20:03,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:20:03,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:20:03,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:20:03,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:20:03,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:20:03,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:20:03,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:20:03,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:20:03,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:20:03,882 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:20:03,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:20:03,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:20:03,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:20:03,884 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:20:03,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:20:03,884 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:20:03,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:20:03,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:20:03,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:20:03,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:20:03,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:20:03,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:20:03,886 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:20:03,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:20:03,887 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:20:03,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:20:03,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:20:03,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:20:03,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:20:03,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:20:03,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:20:03,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:20:03,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:20:03,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:20:03,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:20:03,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:20:03,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:20:03,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:20:04,165 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:20:04,186 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:20:04,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:20:04,191 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:20:04,191 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:20:04,192 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2019-11-07 01:20:04,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bcc16062/5c526217de0b428f9807094d8249db31/FLAG1a2acb281 [2019-11-07 01:20:04,800 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:20:04,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i [2019-11-07 01:20:04,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bcc16062/5c526217de0b428f9807094d8249db31/FLAG1a2acb281 [2019-11-07 01:20:05,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bcc16062/5c526217de0b428f9807094d8249db31 [2019-11-07 01:20:05,113 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:20:05,114 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:20:05,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:20:05,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:20:05,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:20:05,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@427266d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05, skipping insertion in model container [2019-11-07 01:20:05,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,131 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:20:05,188 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:20:05,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:20:05,666 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:20:05,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:20:05,776 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:20:05,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05 WrapperNode [2019-11-07 01:20:05,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:20:05,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:20:05,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:20:05,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:20:05,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (1/1) ... [2019-11-07 01:20:05,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:20:05,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:20:05,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:20:05,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:20:05,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:20:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:20:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:20:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:20:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-07 01:20:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-07 01:20:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2019-11-07 01:20:05,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:20:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-11-07 01:20:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:20:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:20:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:20:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:20:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-07 01:20:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-07 01:20:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 01:20:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 01:20:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 01:20:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 01:20:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 01:20:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 01:20:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 01:20:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 01:20:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 01:20:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 01:20:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 01:20:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 01:20:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 01:20:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 01:20:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 01:20:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 01:20:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 01:20:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 01:20:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 01:20:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 01:20:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 01:20:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 01:20:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 01:20:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 01:20:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 01:20:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 01:20:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 01:20:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 01:20:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 01:20:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 01:20:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 01:20:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 01:20:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 01:20:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 01:20:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 01:20:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 01:20:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 01:20:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 01:20:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 01:20:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 01:20:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 01:20:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 01:20:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 01:20:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 01:20:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 01:20:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 01:20:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 01:20:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 01:20:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 01:20:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 01:20:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 01:20:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 01:20:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 01:20:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 01:20:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-07 01:20:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 01:20:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 01:20:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 01:20:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 01:20:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 01:20:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 01:20:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:20:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 01:20:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 01:20:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 01:20:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 01:20:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 01:20:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 01:20:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 01:20:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 01:20:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 01:20:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 01:20:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 01:20:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 01:20:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 01:20:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 01:20:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 01:20:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 01:20:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 01:20:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 01:20:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 01:20:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 01:20:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 01:20:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2019-11-07 01:20:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:20:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:20:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 01:20:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:20:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:20:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:20:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:20:06,705 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:20:06,705 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 01:20:06,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:06 BoogieIcfgContainer [2019-11-07 01:20:06,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:20:06,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:20:06,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:20:06,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:20:06,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:20:05" (1/3) ... [2019-11-07 01:20:06,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9c3995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:06, skipping insertion in model container [2019-11-07 01:20:06,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:05" (2/3) ... [2019-11-07 01:20:06,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9c3995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:06, skipping insertion in model container [2019-11-07 01:20:06,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:06" (3/3) ... [2019-11-07 01:20:06,716 INFO L109 eAbstractionObserver]: Analyzing ICFG relax-2.i [2019-11-07 01:20:06,726 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:20:06,734 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:20:06,746 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:20:06,777 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:20:06,777 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:20:06,778 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:20:06,778 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:20:06,779 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:20:06,779 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:20:06,787 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:20:06,788 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:20:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-07 01:20:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:20:06,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:06,814 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:06,816 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -79995857, now seen corresponding path program 1 times [2019-11-07 01:20:06,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:06,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287425814] [2019-11-07 01:20:06,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:07,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287425814] [2019-11-07 01:20:07,108 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:20:07,109 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:20:07,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516936928] [2019-11-07 01:20:07,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:20:07,116 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:20:07,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:20:07,151 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2019-11-07 01:20:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:07,201 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2019-11-07 01:20:07,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:20:07,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-07 01:20:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:07,216 INFO L225 Difference]: With dead ends: 61 [2019-11-07 01:20:07,216 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:20:07,220 INFO L630 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 [2019-11-07 01:20:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:20:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-07 01:20:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-07 01:20:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2019-11-07 01:20:07,271 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2019-11-07 01:20:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:07,272 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2019-11-07 01:20:07,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:20:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2019-11-07 01:20:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:20:07,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:07,273 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:07,274 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:07,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1718639790, now seen corresponding path program 1 times [2019-11-07 01:20:07,275 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:07,275 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517362574] [2019-11-07 01:20:07,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:07,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517362574] [2019-11-07 01:20:07,429 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:20:07,430 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:20:07,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731272442] [2019-11-07 01:20:07,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:20:07,434 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:20:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:20:07,436 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 6 states. [2019-11-07 01:20:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:07,593 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2019-11-07 01:20:07,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:20:07,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-07 01:20:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:07,595 INFO L225 Difference]: With dead ends: 68 [2019-11-07 01:20:07,595 INFO L226 Difference]: Without dead ends: 46 [2019-11-07 01:20:07,597 INFO L630 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 [2019-11-07 01:20:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-07 01:20:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-07 01:20:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-07 01:20:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2019-11-07 01:20:07,608 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2019-11-07 01:20:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:07,609 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2019-11-07 01:20:07,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:20:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2019-11-07 01:20:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 01:20:07,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:07,610 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:07,611 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash -912243692, now seen corresponding path program 1 times [2019-11-07 01:20:07,611 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:07,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599968415] [2019-11-07 01:20:07,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:07,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599968415] [2019-11-07 01:20:07,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278207723] [2019-11-07 01:20:07,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:20:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:08,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-07 01:20:08,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:20:08,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:20:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:08,297 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:20:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:08,666 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516915280] [2019-11-07 01:20:08,695 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:20:08,695 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:20:08,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:20:08,710 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:20:08,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:20:08,861 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:20:09,128 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-11-07 01:20:09,134 INFO L197 IcfgInterpreter]: Interpreting procedure is_relaxed_prefix with input of size 12 for LOIs [2019-11-07 01:20:09,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:20:09,149 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:20:10,071 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:20:10,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [8, 9, 8] total 31 [2019-11-07 01:20:10,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157902238] [2019-11-07 01:20:10,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-07 01:20:10,073 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:10,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-07 01:20:10,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:20:10,075 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 16 states. [2019-11-07 01:20:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:11,243 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2019-11-07 01:20:11,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:20:11,244 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-11-07 01:20:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:11,248 INFO L225 Difference]: With dead ends: 102 [2019-11-07 01:20:11,249 INFO L226 Difference]: Without dead ends: 59 [2019-11-07 01:20:11,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2019-11-07 01:20:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-07 01:20:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2019-11-07 01:20:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-07 01:20:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2019-11-07 01:20:11,262 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 19 [2019-11-07 01:20:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:11,262 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2019-11-07 01:20:11,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-07 01:20:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2019-11-07 01:20:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 01:20:11,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:11,264 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:11,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:20:11,468 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1553628473, now seen corresponding path program 1 times [2019-11-07 01:20:11,469 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:11,469 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413760518] [2019-11-07 01:20:11,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:11,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413760518] [2019-11-07 01:20:11,569 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:20:11,569 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:20:11,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332155210] [2019-11-07 01:20:11,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:20:11,570 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:11,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:20:11,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:20:11,570 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand 6 states. [2019-11-07 01:20:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:11,669 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2019-11-07 01:20:11,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:20:11,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-07 01:20:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:11,671 INFO L225 Difference]: With dead ends: 69 [2019-11-07 01:20:11,671 INFO L226 Difference]: Without dead ends: 58 [2019-11-07 01:20:11,672 INFO L630 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 [2019-11-07 01:20:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-07 01:20:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2019-11-07 01:20:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 01:20:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2019-11-07 01:20:11,684 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 19 [2019-11-07 01:20:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:11,684 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2019-11-07 01:20:11,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:20:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2019-11-07 01:20:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:20:11,686 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:11,686 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:11,686 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:11,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:11,687 INFO L82 PathProgramCache]: Analyzing trace with hash -641064631, now seen corresponding path program 1 times [2019-11-07 01:20:11,687 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:11,687 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140185739] [2019-11-07 01:20:11,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:20:12,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140185739] [2019-11-07 01:20:12,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495679731] [2019-11-07 01:20:12,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:20:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:12,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-07 01:20:12,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:20:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:12,303 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:20:13,815 WARN L191 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2019-11-07 01:20:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:13,830 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:20:13,830 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 18 [2019-11-07 01:20:13,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43141038] [2019-11-07 01:20:13,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 01:20:13,831 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:13,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 01:20:13,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=256, Unknown=1, NotChecked=0, Total=306 [2019-11-07 01:20:13,832 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand 8 states. [2019-11-07 01:20:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:14,038 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2019-11-07 01:20:14,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:20:14,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-07 01:20:14,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:14,040 INFO L225 Difference]: With dead ends: 80 [2019-11-07 01:20:14,040 INFO L226 Difference]: Without dead ends: 61 [2019-11-07 01:20:14,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=49, Invalid=256, Unknown=1, NotChecked=0, Total=306 [2019-11-07 01:20:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-07 01:20:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2019-11-07 01:20:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 01:20:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2019-11-07 01:20:14,053 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 20 [2019-11-07 01:20:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:14,053 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2019-11-07 01:20:14,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 01:20:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2019-11-07 01:20:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:20:14,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:14,055 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:14,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:20:14,255 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash 782103735, now seen corresponding path program 1 times [2019-11-07 01:20:14,256 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:14,256 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197833059] [2019-11-07 01:20:14,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:14,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197833059] [2019-11-07 01:20:14,513 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:20:14,513 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 01:20:14,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407903269] [2019-11-07 01:20:14,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 01:20:14,514 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 01:20:14,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:20:14,515 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 8 states. [2019-11-07 01:20:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:14,751 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2019-11-07 01:20:14,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:20:14,753 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-07 01:20:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:14,754 INFO L225 Difference]: With dead ends: 70 [2019-11-07 01:20:14,754 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 01:20:14,755 INFO L630 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 [2019-11-07 01:20:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 01:20:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-07 01:20:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-07 01:20:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2019-11-07 01:20:14,788 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 20 [2019-11-07 01:20:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:14,788 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2019-11-07 01:20:14,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 01:20:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2019-11-07 01:20:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:20:14,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:14,790 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:14,790 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:14,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:14,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1938346965, now seen corresponding path program 1 times [2019-11-07 01:20:14,791 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:14,791 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654500938] [2019-11-07 01:20:14,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:20:14,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654500938] [2019-11-07 01:20:14,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:20:14,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:20:14,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537830806] [2019-11-07 01:20:14,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:20:14,828 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:14,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:20:14,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:20:14,829 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 5 states. [2019-11-07 01:20:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:14,862 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2019-11-07 01:20:14,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:20:14,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-07 01:20:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:14,864 INFO L225 Difference]: With dead ends: 68 [2019-11-07 01:20:14,864 INFO L226 Difference]: Without dead ends: 48 [2019-11-07 01:20:14,865 INFO L630 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 [2019-11-07 01:20:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-07 01:20:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-07 01:20:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-07 01:20:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2019-11-07 01:20:14,873 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 21 [2019-11-07 01:20:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:14,873 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2019-11-07 01:20:14,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:20:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2019-11-07 01:20:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 01:20:14,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:14,874 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:14,875 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:14,875 INFO L82 PathProgramCache]: Analyzing trace with hash -835282700, now seen corresponding path program 1 times [2019-11-07 01:20:14,875 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:14,875 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093389906] [2019-11-07 01:20:14,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:20:15,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093389906] [2019-11-07 01:20:15,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568877899] [2019-11-07 01:20:15,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:20:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:15,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-07 01:20:15,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:20:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:20:15,584 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:20:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:20:15,739 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:20:15,739 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [14] total 21 [2019-11-07 01:20:15,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690662990] [2019-11-07 01:20:15,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 01:20:15,740 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 01:20:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:20:15,741 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 11 states. [2019-11-07 01:20:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:15,906 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-11-07 01:20:15,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:20:15,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-11-07 01:20:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:15,907 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:20:15,907 INFO L226 Difference]: Without dead ends: 52 [2019-11-07 01:20:15,908 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:20:15,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-07 01:20:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-07 01:20:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-07 01:20:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2019-11-07 01:20:15,915 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 23 [2019-11-07 01:20:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:15,916 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2019-11-07 01:20:15,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 01:20:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2019-11-07 01:20:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 01:20:15,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:15,917 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:16,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:20:16,121 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:16,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:16,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1804877092, now seen corresponding path program 1 times [2019-11-07 01:20:16,122 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:16,122 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598119150] [2019-11-07 01:20:16,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:20:16,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598119150] [2019-11-07 01:20:16,267 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:20:16,267 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:20:16,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452940346] [2019-11-07 01:20:16,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:20:16,268 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:20:16,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:20:16,268 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 5 states. [2019-11-07 01:20:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:20:16,319 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-11-07 01:20:16,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:20:16,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-11-07 01:20:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:20:16,321 INFO L225 Difference]: With dead ends: 60 [2019-11-07 01:20:16,321 INFO L226 Difference]: Without dead ends: 53 [2019-11-07 01:20:16,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:20:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-07 01:20:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-07 01:20:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-07 01:20:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-11-07 01:20:16,332 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 26 [2019-11-07 01:20:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:20:16,333 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-11-07 01:20:16,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:20:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-11-07 01:20:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-07 01:20:16,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:20:16,336 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:20:16,336 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:20:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:20:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash -401747603, now seen corresponding path program 1 times [2019-11-07 01:20:16,337 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:20:16,337 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670100434] [2019-11-07 01:20:16,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:20:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:19,237 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2019-11-07 01:20:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:20:19,374 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670100434] [2019-11-07 01:20:19,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305152145] [2019-11-07 01:20:19,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:20:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:20:19,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-07 01:20:19,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:20:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:20:19,782 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:20:20,392 WARN L191 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 139 [2019-11-07 01:20:20,603 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:20:22,873 WARN L191 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 109 [2019-11-07 01:20:23,096 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-11-07 01:20:23,378 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2019-11-07 01:20:23,710 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-11-07 01:20:28,432 WARN L191 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 132 DAG size of output: 21 [2019-11-07 01:20:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:20:30,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1408228081] [2019-11-07 01:20:30,292 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2019-11-07 01:20:30,292 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:20:30,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:20:30,293 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:20:30,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:20:30,323 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:20:30,609 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:20:30,612 INFO L197 IcfgInterpreter]: Interpreting procedure is_relaxed_prefix with input of size 10 for LOIs [2019-11-07 01:20:30,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:20:30,684 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:20:32,611 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2019-11-07 01:20:33,469 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-11-07 01:20:33,820 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:20:33,820 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 14, 19] total 50 [2019-11-07 01:20:33,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207539650] [2019-11-07 01:20:33,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-07 01:20:33,821 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-07 01:20:33,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2276, Unknown=2, NotChecked=0, Total=2450 [2019-11-07 01:20:33,823 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 50 states. [2019-11-07 01:20:35,629 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2019-11-07 01:20:35,975 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2019-11-07 01:20:36,999 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-11-07 01:20:37,523 WARN L191 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2019-11-07 01:20:38,183 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-11-07 01:20:41,618 WARN L191 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 124 DAG size of output: 115 [2019-11-07 01:20:44,806 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41