/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:07:04,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:07:04,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:07:04,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:07:04,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:07:04,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:07:04,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:07:04,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:07:04,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:07:04,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:07:04,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:07:04,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:07:04,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:07:04,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:07:04,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:07:04,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:07:04,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:07:04,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:07:04,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:07:04,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:07:04,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:07:04,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:07:04,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:07:04,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:07:04,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:07:04,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:07:04,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:07:04,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:07:04,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:07:04,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:07:04,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:07:04,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:07:04,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:07:04,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:07:04,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:07:04,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:07:04,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:07:04,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:07:04,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:07:04,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:07:04,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:07:04,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:07:04,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:07:04,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:07:04,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:07:04,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:07:04,900 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:07:04,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:07:04,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:07:04,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:07:04,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:07:04,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:07:04,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:07:04,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:07:04,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:07:04,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:07:04,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:07:04,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:07:04,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:07:04,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:07:04,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:07:04,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:07:04,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:07:04,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:04,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:07:04,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:07:04,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:07:04,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:07:04,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:07:04,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:07:04,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:07:04,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:07:05,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:07:05,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:07:05,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:07:05,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:07:05,182 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:07:05,183 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i [2020-08-18 21:07:05,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0e533c78/756addec735f48a7afde78daecc1a502/FLAG925f97f76 [2020-08-18 21:07:05,820 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:05,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i [2020-08-18 21:07:05,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0e533c78/756addec735f48a7afde78daecc1a502/FLAG925f97f76 [2020-08-18 21:07:06,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0e533c78/756addec735f48a7afde78daecc1a502 [2020-08-18 21:07:06,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:06,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:06,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:06,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:06,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:06,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770ea115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06, skipping insertion in model container [2020-08-18 21:07:06,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:06,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:06,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:06,722 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:06,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:06,867 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:06,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06 WrapperNode [2020-08-18 21:07:06,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:06,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:06,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:06,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:06,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:06,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:06,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:06,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:06,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 21:07:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 21:07:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 21:07:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 21:07:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-18 21:07:07,044 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-18 21:07:07,044 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-18 21:07:07,044 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-18 21:07:07,044 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-18 21:07:07,044 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-18 21:07:07,044 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-18 21:07:07,044 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-18 21:07:07,045 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-18 21:07:07,045 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-18 21:07:07,045 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-18 21:07:07,045 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-18 21:07:07,045 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-18 21:07:07,046 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-18 21:07:07,046 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-18 21:07:07,046 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-18 21:07:07,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 21:07:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 21:07:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 21:07:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 21:07:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 21:07:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 21:07:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 21:07:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 21:07:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 21:07:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 21:07:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 21:07:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 21:07:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 21:07:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 21:07:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 21:07:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 21:07:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 21:07:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 21:07:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 21:07:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 21:07:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 21:07:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 21:07:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 21:07:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 21:07:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 21:07:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 21:07:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 21:07:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 21:07:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 21:07:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 21:07:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 21:07:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 21:07:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 21:07:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 21:07:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 21:07:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 21:07:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 21:07:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 21:07:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 21:07:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 21:07:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 21:07:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 21:07:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 21:07:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 21:07:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 21:07:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 21:07:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 21:07:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 21:07:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 21:07:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 21:07:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 21:07:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 21:07:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:07:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 21:07:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 21:07:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:07:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 21:07:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 21:07:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 21:07:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 21:07:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 21:07:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:07:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 21:07:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 21:07:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 21:07:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 21:07:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 21:07:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 21:07:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 21:07:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 21:07:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 21:07:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 21:07:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 21:07:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 21:07:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 21:07:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 21:07:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 21:07:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 21:07:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 21:07:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 21:07:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 21:07:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 21:07:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 21:07:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 21:07:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 21:07:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 21:07:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 21:07:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 21:07:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 21:07:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 21:07:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 21:07:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 21:07:07,061 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 21:07:07,061 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 21:07:07,061 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 21:07:07,061 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 21:07:07,061 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 21:07:07,061 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 21:07:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 21:07:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 21:07:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 21:07:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 21:07:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 21:07:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 21:07:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 21:07:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:07:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-18 21:07:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-18 21:07:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:07:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:07:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-18 21:07:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-18 21:07:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:07:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-18 21:07:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:07:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 21:07:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 21:07:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:07:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-18 21:07:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-18 21:07:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-18 21:07:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-18 21:07:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-18 21:07:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-18 21:07:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-18 21:07:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-18 21:07:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-18 21:07:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-18 21:07:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-18 21:07:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:07,939 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:07,940 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-18 21:07:07,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:07 BoogieIcfgContainer [2020-08-18 21:07:07,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:07,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:07,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:07,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:07,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:06" (1/3) ... [2020-08-18 21:07:07,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18856d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:07, skipping insertion in model container [2020-08-18 21:07:07,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (2/3) ... [2020-08-18 21:07:07,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18856d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:07, skipping insertion in model container [2020-08-18 21:07:07,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:07" (3/3) ... [2020-08-18 21:07:07,964 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-2.i [2020-08-18 21:07:07,974 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:07,982 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:07:07,994 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:07:08,017 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:08,017 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:08,017 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:08,018 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:08,018 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:08,018 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:08,018 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:08,018 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-18 21:07:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 21:07:08,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:08,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:08,051 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:08,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-18 21:07:08,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:08,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299971951] [2020-08-18 21:07:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 21:07:08,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299971951] [2020-08-18 21:07:08,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:08,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:08,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632107940] [2020-08-18 21:07:08,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:08,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:08,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:08,550 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-18 21:07:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:09,019 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-18 21:07:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:09,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-18 21:07:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:09,035 INFO L225 Difference]: With dead ends: 343 [2020-08-18 21:07:09,035 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 21:07:09,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 21:07:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-18 21:07:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 21:07:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-18 21:07:09,126 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-18 21:07:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:09,127 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-18 21:07:09,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-18 21:07:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 21:07:09,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:09,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:09,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:09,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-18 21:07:09,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:09,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108818521] [2020-08-18 21:07:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 21:07:09,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108818521] [2020-08-18 21:07:09,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:09,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:07:09,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402836299] [2020-08-18 21:07:09,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:07:09,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:07:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:07:09,709 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-18 21:07:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:10,923 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-18 21:07:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:07:10,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-18 21:07:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:10,928 INFO L225 Difference]: With dead ends: 327 [2020-08-18 21:07:10,928 INFO L226 Difference]: Without dead ends: 179 [2020-08-18 21:07:10,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:07:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-18 21:07:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-18 21:07:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 21:07:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-18 21:07:10,955 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-18 21:07:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:10,956 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-18 21:07:10,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:07:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-18 21:07:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:07:10,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:10,959 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:10,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:10,959 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-18 21:07:10,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:10,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492444219] [2020-08-18 21:07:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-18 21:07:12,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492444219] [2020-08-18 21:07:12,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:12,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 21:07:12,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555066092] [2020-08-18 21:07:12,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 21:07:12,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:12,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 21:07:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-08-18 21:07:12,911 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 29 states. [2020-08-18 21:07:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:16,555 INFO L93 Difference]: Finished difference Result 358 states and 439 transitions. [2020-08-18 21:07:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 21:07:16,555 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 154 [2020-08-18 21:07:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:16,559 INFO L225 Difference]: With dead ends: 358 [2020-08-18 21:07:16,560 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 21:07:16,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=237, Invalid=2415, Unknown=0, NotChecked=0, Total=2652 [2020-08-18 21:07:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 21:07:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 185. [2020-08-18 21:07:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 21:07:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-18 21:07:16,585 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-18 21:07:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:16,586 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-18 21:07:16,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 21:07:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-18 21:07:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:07:16,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:16,589 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:16,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:16,589 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-18 21:07:16,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:16,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075086795] [2020-08-18 21:07:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:16,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:16,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:16,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-18 21:07:17,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075086795] [2020-08-18 21:07:17,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:17,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 21:07:17,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580716779] [2020-08-18 21:07:17,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 21:07:17,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:17,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 21:07:17,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:07:17,825 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 19 states. [2020-08-18 21:07:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:19,979 INFO L93 Difference]: Finished difference Result 375 states and 445 transitions. [2020-08-18 21:07:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 21:07:19,980 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-18 21:07:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:19,984 INFO L225 Difference]: With dead ends: 375 [2020-08-18 21:07:19,985 INFO L226 Difference]: Without dead ends: 202 [2020-08-18 21:07:19,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:07:19,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-18 21:07:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 189. [2020-08-18 21:07:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-08-18 21:07:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 222 transitions. [2020-08-18 21:07:20,008 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 222 transitions. Word has length 154 [2020-08-18 21:07:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:20,009 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 222 transitions. [2020-08-18 21:07:20,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 21:07:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 222 transitions. [2020-08-18 21:07:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:07:20,012 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:20,013 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:20,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:07:20,013 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:20,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-18 21:07:20,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:20,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384755564] [2020-08-18 21:07:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-18 21:07:21,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384755564] [2020-08-18 21:07:21,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:21,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 21:07:21,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769361419] [2020-08-18 21:07:21,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 21:07:21,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:21,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 21:07:21,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-18 21:07:21,581 INFO L87 Difference]: Start difference. First operand 189 states and 222 transitions. Second operand 22 states. [2020-08-18 21:07:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:23,768 INFO L93 Difference]: Finished difference Result 327 states and 393 transitions. [2020-08-18 21:07:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 21:07:23,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-18 21:07:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:23,773 INFO L225 Difference]: With dead ends: 327 [2020-08-18 21:07:23,773 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 21:07:23,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 21:07:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 21:07:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 213. [2020-08-18 21:07:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-18 21:07:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2020-08-18 21:07:23,802 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 154 [2020-08-18 21:07:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:23,803 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2020-08-18 21:07:23,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 21:07:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2020-08-18 21:07:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 21:07:23,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:23,806 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:23,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:07:23,807 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-18 21:07:23,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:23,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975107227] [2020-08-18 21:07:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:24,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:25,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:25,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:25,601 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-08-18 21:07:25,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:26,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,244 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-08-18 21:07:27,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,359 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 257 DAG size of output: 48