/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/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:08:15,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:08:15,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:08:15,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:08:15,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:08:15,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:08:15,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:08:15,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:08:15,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:08:15,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:08:15,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:08:15,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:08:15,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:08:15,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:08:15,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:08:15,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:08:15,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:08:15,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:08:15,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:08:15,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:08:15,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:08:15,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:08:15,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:08:15,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:08:15,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:08:15,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:08:15,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:08:15,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:08:15,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:08:15,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:08:15,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:08:15,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:08:15,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:08:15,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:08:15,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:08:15,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:08:15,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:08:15,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:08:15,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:08:15,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:08:15,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:08:15,912 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 21:08:15,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:08:15,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:08:15,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:08:15,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:08:15,968 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:08:15,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:08:15,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:08:15,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:08:15,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:08:15,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:08:15,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:08:15,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:08:15,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:08:15,973 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:08:15,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:08:15,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:08:15,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:08:15,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:08:15,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:08:15,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:08:15,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:08:15,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:08:15,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:08:15,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:08:15,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:08:15,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:08:15,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:08:15,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:08:15,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:08:15,976 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 21:08:16,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:08:16,338 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:08:16,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:08:16,346 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:08:16,346 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:08:16,348 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-18 21:08:16,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a904ea1a6/dcec9bd42049473bb9ae8ed200d8b66d/FLAG9c335b71c [2020-08-18 21:08:16,993 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:08:16,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-18 21:08:17,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a904ea1a6/dcec9bd42049473bb9ae8ed200d8b66d/FLAG9c335b71c [2020-08-18 21:08:17,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a904ea1a6/dcec9bd42049473bb9ae8ed200d8b66d [2020-08-18 21:08:17,300 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:08:17,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:08:17,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:08:17,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:08:17,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:08:17,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:17,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5ae353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17, skipping insertion in model container [2020-08-18 21:08:17,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:17,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:08:17,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:08:17,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:08:17,831 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:08:17,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:08:17,943 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:08:17,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17 WrapperNode [2020-08-18 21:08:17,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:08:17,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:08:17,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:08:17,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:08:17,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:17,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:17,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:17,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:17,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:18,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:18,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (1/1) ... [2020-08-18 21:08:18,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:08:18,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:08:18,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:08:18,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:08:18,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (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 21:08:18,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:08:18,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:08:18,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 21:08:18,074 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 21:08:18,074 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-18 21:08:18,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:08:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:08:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:08:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 21:08:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 21:08:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 21:08:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 21:08:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 21:08:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 21:08:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 21:08:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 21:08:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 21:08:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 21:08:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 21:08:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 21:08:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 21:08:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 21:08:18,081 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 21:08:18,081 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 21:08:18,082 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 21:08:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 21:08:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 21:08:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 21:08:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 21:08:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 21:08:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 21:08:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 21:08:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 21:08:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 21:08:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 21:08:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 21:08:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 21:08:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 21:08:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 21:08:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 21:08:18,086 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 21:08:18,086 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 21:08:18,086 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 21:08:18,087 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 21:08:18,088 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 21:08:18,088 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 21:08:18,088 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 21:08:18,088 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 21:08:18,088 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 21:08:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 21:08:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 21:08:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 21:08:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 21:08:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 21:08:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 21:08:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 21:08:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 21:08:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 21:08:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 21:08:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 21:08:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:08:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 21:08:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 21:08:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:08:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 21:08:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 21:08:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 21:08:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 21:08:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 21:08:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:08:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 21:08:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 21:08:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 21:08:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 21:08:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 21:08:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 21:08:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 21:08:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 21:08:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 21:08:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 21:08:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 21:08:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 21:08:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 21:08:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 21:08:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 21:08:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-18 21:08:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:08:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:08:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:08:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:08:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:08:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:08:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:08:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:08:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:08:18,452 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-18 21:08:18,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:08:18,806 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-18 21:08:18,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:08:18 BoogieIcfgContainer [2020-08-18 21:08:18,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:08:18,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:08:18,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:08:18,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:08:18,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:08:17" (1/3) ... [2020-08-18 21:08:18,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb0fa1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:08:18, skipping insertion in model container [2020-08-18 21:08:18,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:08:17" (2/3) ... [2020-08-18 21:08:18,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb0fa1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:08:18, skipping insertion in model container [2020-08-18 21:08:18,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:08:18" (3/3) ... [2020-08-18 21:08:18,820 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-08-18 21:08:18,831 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:08:18,839 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:08:18,854 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:08:18,875 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:08:18,875 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:08:18,875 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:08:18,876 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:08:18,876 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:08:18,876 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:08:18,876 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:08:18,876 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:08:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-08-18 21:08:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:08:18,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:18,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:18,906 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:18,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-08-18 21:08:18,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:18,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160561099] [2020-08-18 21:08:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:19,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:08:19,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160561099] [2020-08-18 21:08:19,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:19,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:08:19,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135069852] [2020-08-18 21:08:19,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:08:19,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:19,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:08:19,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:08:19,189 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-08-18 21:08:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:19,372 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-08-18 21:08:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:08:19,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:08:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:19,384 INFO L225 Difference]: With dead ends: 108 [2020-08-18 21:08:19,385 INFO L226 Difference]: Without dead ends: 47 [2020-08-18 21:08:19,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:08:19,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-18 21:08:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-18 21:08:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-18 21:08:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-08-18 21:08:19,436 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-08-18 21:08:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:19,436 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-08-18 21:08:19,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:08:19,437 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-08-18 21:08:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:08:19,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:19,438 INFO L422 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] [2020-08-18 21:08:19,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:08:19,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:19,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-08-18 21:08:19,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:19,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552351091] [2020-08-18 21:08:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:19,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:08:19,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552351091] [2020-08-18 21:08:19,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:19,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:08:19,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508931429] [2020-08-18 21:08:19,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:08:19,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:08:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:08:19,528 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-08-18 21:08:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:19,670 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-08-18 21:08:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:08:19,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 21:08:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:19,673 INFO L225 Difference]: With dead ends: 75 [2020-08-18 21:08:19,674 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 21:08:19,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:08:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 21:08:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 21:08:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 21:08:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-08-18 21:08:19,685 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-08-18 21:08:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:19,685 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-08-18 21:08:19,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:08:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-08-18 21:08:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 21:08:19,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:19,687 INFO L422 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, 1, 1, 1, 1] [2020-08-18 21:08:19,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:08:19,688 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:19,688 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-08-18 21:08:19,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:19,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111837062] [2020-08-18 21:08:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:19,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:08:19,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111837062] [2020-08-18 21:08:19,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:19,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:08:19,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092450564] [2020-08-18 21:08:19,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:08:19,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:19,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:08:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:08:19,766 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-08-18 21:08:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:19,894 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-08-18 21:08:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:08:19,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-18 21:08:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:19,896 INFO L225 Difference]: With dead ends: 93 [2020-08-18 21:08:19,896 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 21:08:19,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:08:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 21:08:19,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 21:08:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 21:08:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-08-18 21:08:19,905 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-08-18 21:08:19,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:19,905 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-08-18 21:08:19,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:08:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-08-18 21:08:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 21:08:19,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:19,907 INFO L422 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, 1, 1, 1, 1] [2020-08-18 21:08:19,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:08:19,907 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:19,908 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-08-18 21:08:19,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:19,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788930841] [2020-08-18 21:08:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:20,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:20,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788930841] [2020-08-18 21:08:20,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:20,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:08:20,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419002489] [2020-08-18 21:08:20,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:08:20,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:20,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:08:20,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:08:20,041 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-08-18 21:08:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:20,255 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-08-18 21:08:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:08:20,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-18 21:08:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:20,257 INFO L225 Difference]: With dead ends: 82 [2020-08-18 21:08:20,258 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 21:08:20,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:08:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 21:08:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-18 21:08:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 21:08:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-08-18 21:08:20,268 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-08-18 21:08:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:20,268 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-08-18 21:08:20,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:08:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-08-18 21:08:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 21:08:20,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:20,270 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:20,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:08:20,271 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:20,271 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-08-18 21:08:20,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:20,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226580257] [2020-08-18 21:08:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:20,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:20,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226580257] [2020-08-18 21:08:20,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:20,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:08:20,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101807564] [2020-08-18 21:08:20,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:08:20,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:08:20,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:08:20,365 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-08-18 21:08:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:20,586 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-18 21:08:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:08:20,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-18 21:08:20,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:20,588 INFO L225 Difference]: With dead ends: 84 [2020-08-18 21:08:20,588 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 21:08:20,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:08:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 21:08:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-08-18 21:08:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 21:08:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-08-18 21:08:20,596 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-08-18 21:08:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:20,596 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-08-18 21:08:20,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:08:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-08-18 21:08:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 21:08:20,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:20,598 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:20,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:08:20,598 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-08-18 21:08:20,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:20,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434326266] [2020-08-18 21:08:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:20,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:20,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434326266] [2020-08-18 21:08:20,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:20,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:08:20,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550289537] [2020-08-18 21:08:20,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:08:20,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:20,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:08:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:08:20,678 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-08-18 21:08:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:20,880 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-18 21:08:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:08:20,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-18 21:08:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:20,881 INFO L225 Difference]: With dead ends: 84 [2020-08-18 21:08:20,882 INFO L226 Difference]: Without dead ends: 73 [2020-08-18 21:08:20,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:08:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-18 21:08:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-08-18 21:08:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 21:08:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-08-18 21:08:20,888 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-08-18 21:08:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:20,889 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-08-18 21:08:20,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:08:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-08-18 21:08:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 21:08:20,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:20,891 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:20,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:08:20,891 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:20,892 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-08-18 21:08:20,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:20,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483780279] [2020-08-18 21:08:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:21,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:21,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483780279] [2020-08-18 21:08:21,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:21,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:08:21,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631926478] [2020-08-18 21:08:21,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:08:21,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:21,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:08:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:08:21,017 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 9 states. [2020-08-18 21:08:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:21,352 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-08-18 21:08:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:08:21,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-18 21:08:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:21,355 INFO L225 Difference]: With dead ends: 86 [2020-08-18 21:08:21,355 INFO L226 Difference]: Without dead ends: 80 [2020-08-18 21:08:21,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:08:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-18 21:08:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-08-18 21:08:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-18 21:08:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-08-18 21:08:21,372 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-08-18 21:08:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:21,372 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-08-18 21:08:21,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:08:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-08-18 21:08:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 21:08:21,374 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:21,374 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:21,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:08:21,375 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-08-18 21:08:21,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:21,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638450755] [2020-08-18 21:08:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:21,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:21,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638450755] [2020-08-18 21:08:21,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:21,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:08:21,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544735436] [2020-08-18 21:08:21,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:08:21,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:21,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:08:21,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:08:21,543 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-08-18 21:08:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:21,943 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-08-18 21:08:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:08:21,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-18 21:08:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:21,945 INFO L225 Difference]: With dead ends: 95 [2020-08-18 21:08:21,946 INFO L226 Difference]: Without dead ends: 91 [2020-08-18 21:08:21,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:08:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-18 21:08:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-08-18 21:08:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 21:08:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-08-18 21:08:21,955 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-08-18 21:08:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:21,956 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-08-18 21:08:21,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:08:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-08-18 21:08:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 21:08:21,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:21,957 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-08-18 21:08:21,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:08:21,958 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-08-18 21:08:21,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:21,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028888179] [2020-08-18 21:08:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:22,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:22,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028888179] [2020-08-18 21:08:22,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:22,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:08:22,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872344090] [2020-08-18 21:08:22,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:08:22,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:08:22,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:08:22,186 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-08-18 21:08:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:22,681 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-08-18 21:08:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:08:22,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-18 21:08:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:22,683 INFO L225 Difference]: With dead ends: 99 [2020-08-18 21:08:22,683 INFO L226 Difference]: Without dead ends: 95 [2020-08-18 21:08:22,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:08:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-18 21:08:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-08-18 21:08:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 21:08:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-08-18 21:08:22,696 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-08-18 21:08:22,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:22,696 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-08-18 21:08:22,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:08:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-08-18 21:08:22,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 21:08:22,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:22,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:22,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:08:22,698 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-08-18 21:08:22,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:22,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016269123] [2020-08-18 21:08:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:22,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:22,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016269123] [2020-08-18 21:08:22,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:22,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:08:22,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649836156] [2020-08-18 21:08:22,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:08:22,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:22,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:08:22,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:08:22,887 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-08-18 21:08:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:23,308 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-08-18 21:08:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:08:23,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-18 21:08:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:23,309 INFO L225 Difference]: With dead ends: 101 [2020-08-18 21:08:23,310 INFO L226 Difference]: Without dead ends: 91 [2020-08-18 21:08:23,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:08:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-18 21:08:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-08-18 21:08:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 21:08:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-08-18 21:08:23,316 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-08-18 21:08:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:23,316 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-08-18 21:08:23,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:08:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-08-18 21:08:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 21:08:23,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:23,318 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2020-08-18 21:08:23,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:08:23,318 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:23,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-08-18 21:08:23,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:23,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485152818] [2020-08-18 21:08:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:23,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:23,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485152818] [2020-08-18 21:08:23,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:23,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:08:23,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814049102] [2020-08-18 21:08:23,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:08:23,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:08:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:08:23,520 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-08-18 21:08:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:23,928 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-18 21:08:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:08:23,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-18 21:08:23,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:23,930 INFO L225 Difference]: With dead ends: 94 [2020-08-18 21:08:23,930 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 21:08:23,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:08:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 21:08:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-08-18 21:08:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 21:08:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-08-18 21:08:23,937 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-08-18 21:08:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:23,938 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-08-18 21:08:23,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:08:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-08-18 21:08:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 21:08:23,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:23,939 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2020-08-18 21:08:23,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:08:23,939 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-08-18 21:08:23,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:23,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863951681] [2020-08-18 21:08:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:24,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:24,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863951681] [2020-08-18 21:08:24,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:24,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:08:24,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12235302] [2020-08-18 21:08:24,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:08:24,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:08:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:08:24,131 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 13 states. [2020-08-18 21:08:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:24,687 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-18 21:08:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:08:24,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-18 21:08:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:24,689 INFO L225 Difference]: With dead ends: 94 [2020-08-18 21:08:24,689 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 21:08:24,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-18 21:08:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 21:08:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-08-18 21:08:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-18 21:08:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-08-18 21:08:24,699 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 39 [2020-08-18 21:08:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:24,699 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-08-18 21:08:24,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:08:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-08-18 21:08:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 21:08:24,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:24,704 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:24,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:08:24,705 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-08-18 21:08:24,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:24,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215776681] [2020-08-18 21:08:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:24,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:24,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215776681] [2020-08-18 21:08:24,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:24,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:08:24,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373450109] [2020-08-18 21:08:24,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:08:24,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:08:24,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:08:24,940 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 13 states. [2020-08-18 21:08:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:25,617 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2020-08-18 21:08:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:08:25,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-18 21:08:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:25,620 INFO L225 Difference]: With dead ends: 107 [2020-08-18 21:08:25,620 INFO L226 Difference]: Without dead ends: 103 [2020-08-18 21:08:25,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-08-18 21:08:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-18 21:08:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-08-18 21:08:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 21:08:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2020-08-18 21:08:25,626 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 39 [2020-08-18 21:08:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:25,626 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2020-08-18 21:08:25,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:08:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2020-08-18 21:08:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 21:08:25,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:25,628 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:25,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:08:25,628 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2037263357, now seen corresponding path program 1 times [2020-08-18 21:08:25,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:25,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058509537] [2020-08-18 21:08:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:25,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:25,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058509537] [2020-08-18 21:08:25,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:25,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:08:25,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083963334] [2020-08-18 21:08:25,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:08:25,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:08:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:08:25,804 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 13 states. [2020-08-18 21:08:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:26,380 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2020-08-18 21:08:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:08:26,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-18 21:08:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:26,382 INFO L225 Difference]: With dead ends: 109 [2020-08-18 21:08:26,382 INFO L226 Difference]: Without dead ends: 101 [2020-08-18 21:08:26,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-18 21:08:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-18 21:08:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-08-18 21:08:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-18 21:08:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-08-18 21:08:26,390 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 41 [2020-08-18 21:08:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:26,392 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-08-18 21:08:26,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:08:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-08-18 21:08:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 21:08:26,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:26,394 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:26,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:08:26,395 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:26,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:26,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-08-18 21:08:26,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:26,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844211543] [2020-08-18 21:08:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:26,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:26,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844211543] [2020-08-18 21:08:26,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:08:26,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:08:26,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829039438] [2020-08-18 21:08:26,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:08:26,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:26,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:08:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:08:26,790 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 13 states. [2020-08-18 21:08:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:27,609 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-08-18 21:08:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:08:27,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-18 21:08:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:27,611 INFO L225 Difference]: With dead ends: 116 [2020-08-18 21:08:27,612 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 21:08:27,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-18 21:08:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 21:08:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-08-18 21:08:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 21:08:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-08-18 21:08:27,618 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 41 [2020-08-18 21:08:27,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:27,619 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-08-18 21:08:27,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:08:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-08-18 21:08:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 21:08:27,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:27,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:27,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:08:27,620 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:27,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-08-18 21:08:27,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:27,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839768704] [2020-08-18 21:08:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:08:27,668 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:08:27,668 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:08:27,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:08:27,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:08:27 BoogieIcfgContainer [2020-08-18 21:08:27,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:08:27,695 INFO L168 Benchmark]: Toolchain (without parser) took 10391.90 ms. Allocated memory was 140.0 MB in the beginning and 314.0 MB in the end (delta: 174.1 MB). Free memory was 101.5 MB in the beginning and 151.4 MB in the end (delta: -49.8 MB). Peak memory consumption was 124.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:27,695 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:08:27,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 640.53 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 167.9 MB in the end (delta: -66.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:27,697 INFO L168 Benchmark]: Boogie Preprocessor took 75.42 ms. Allocated memory is still 202.9 MB. Free memory was 167.9 MB in the beginning and 164.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:27,698 INFO L168 Benchmark]: RCFGBuilder took 789.95 ms. Allocated memory is still 202.9 MB. Free memory was 164.6 MB in the beginning and 107.9 MB in the end (delta: 56.7 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:27,699 INFO L168 Benchmark]: TraceAbstraction took 8879.87 ms. Allocated memory was 202.9 MB in the beginning and 314.0 MB in the end (delta: 111.1 MB). Free memory was 107.3 MB in the beginning and 151.4 MB in the end (delta: -44.1 MB). Peak memory consumption was 67.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:27,702 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 640.53 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 167.9 MB in the end (delta: -66.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.42 ms. Allocated memory is still 202.9 MB. Free memory was 167.9 MB in the beginning and 164.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 789.95 ms. Allocated memory is still 202.9 MB. Free memory was 164.6 MB in the beginning and 107.9 MB in the end (delta: 56.7 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8879.87 ms. Allocated memory was 202.9 MB in the beginning and 314.0 MB in the end (delta: 111.1 MB). Free memory was 107.3 MB in the beginning and 151.4 MB in the end (delta: -44.1 MB). Peak memory consumption was 67.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 855 SDtfs, 581 SDslu, 3411 SDs, 0 SdLazy, 3002 SolverSat, 254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 154 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 559 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 106880 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 25/71 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...