/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:14:52,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:14:52,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:14:52,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:14:52,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:14:52,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:14:52,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:14:52,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:14:52,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:14:52,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:14:52,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:14:52,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:14:52,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:14:52,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:14:52,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:14:52,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:14:52,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:14:52,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:14:52,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:14:52,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:14:52,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:14:52,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:14:52,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:14:52,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:14:52,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 12:14:52,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 12:14:52,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 12:14:52,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 12:14:52,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 12:14:52,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 12:14:52,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 12:14:52,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 12:14:52,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 12:14:52,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 12:14:52,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 12:14:52,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 12:14:52,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 12:14:52,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 12:14:52,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:14:52,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:14:52,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:14:52,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:14:52,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:14:52,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:14:52,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:14:52,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:14:52,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:14:52,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:14:52,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:14:52,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:14:52,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:14:52,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:14:52,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:14:52,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:14:52,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:14:52,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:14:52,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:14:52,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:14:52,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:14:52,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:14:52,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:14:52,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:14:52,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:14:53,000 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:14:53,000 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:14:53,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:14:53,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:14:53,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:14:53,169 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:14:53,169 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:14:53,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2022-01-31 12:14:53,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e76a7d70/882c41fedf6a4ff7ad7477a40568eb98/FLAG1cf61f85a [2022-01-31 12:14:53,635 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:14:53,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2022-01-31 12:14:53,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e76a7d70/882c41fedf6a4ff7ad7477a40568eb98/FLAG1cf61f85a [2022-01-31 12:14:53,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e76a7d70/882c41fedf6a4ff7ad7477a40568eb98 [2022-01-31 12:14:53,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:14:53,668 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:14:53,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:14:53,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:14:53,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:14:53,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5942f02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53, skipping insertion in model container [2022-01-31 12:14:53,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:14:53,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:14:53,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2022-01-31 12:14:53,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:14:53,873 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:14:53,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2022-01-31 12:14:53,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:14:53,900 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:14:53,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53 WrapperNode [2022-01-31 12:14:53,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:14:53,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:14:53,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:14:53,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:14:53,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:14:53,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:14:53,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:14:53,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:14:53,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (1/1) ... [2022-01-31 12:14:53,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:14:53,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:14:53,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 12:14:53,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 12:14:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:14:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:14:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:14:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 12:14:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2022-01-31 12:14:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2022-01-31 12:14:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:14:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:14:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:14:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 12:14:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 12:14:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:14:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:14:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-01-31 12:14:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-01-31 12:14:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2022-01-31 12:14:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2022-01-31 12:14:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 12:14:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:14:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:14:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:14:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:14:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:14:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:14:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:14:54,083 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:14:54,085 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:14:54,254 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:14:54,258 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:14:54,259 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 12:14:54,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:14:54 BoogieIcfgContainer [2022-01-31 12:14:54,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:14:54,261 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:14:54,261 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:14:54,262 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:14:54,264 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:14:54" (1/1) ... [2022-01-31 12:14:54,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:14:54 BasicIcfg [2022-01-31 12:14:54,278 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:14:54,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:14:54,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:14:54,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:14:54,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:14:53" (1/4) ... [2022-01-31 12:14:54,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fa5adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:14:54, skipping insertion in model container [2022-01-31 12:14:54,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:14:53" (2/4) ... [2022-01-31 12:14:54,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fa5adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:14:54, skipping insertion in model container [2022-01-31 12:14:54,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:14:54" (3/4) ... [2022-01-31 12:14:54,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fa5adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:14:54, skipping insertion in model container [2022-01-31 12:14:54,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:14:54" (4/4) ... [2022-01-31 12:14:54,283 INFO L111 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.iJordan [2022-01-31 12:14:54,287 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:14:54,287 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:14:54,323 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:14:54,327 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 12:14:54,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:14:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 44 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 12:14:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 12:14:54,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:14:54,343 INFO L514 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, 1] [2022-01-31 12:14:54,344 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:14:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:14:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1913248372, now seen corresponding path program 1 times [2022-01-31 12:14:54,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:14:54,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111506106] [2022-01-31 12:14:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:54,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:14:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:14:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 12:14:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:14:54,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:14:54,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111506106] [2022-01-31 12:14:54,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111506106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:14:54,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:14:54,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 12:14:54,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462568255] [2022-01-31 12:14:54,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:14:54,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 12:14:54,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:14:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 12:14:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 12:14:54,583 INFO L87 Difference]: Start difference. First operand has 55 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 44 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:14:54,625 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-01-31 12:14:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 12:14:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-01-31 12:14:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:14:54,634 INFO L225 Difference]: With dead ends: 55 [2022-01-31 12:14:54,634 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 12:14:54,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 12:14:54,640 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 55 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:14:54,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 68 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:14:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 12:14:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-31 12:14:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:14:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-01-31 12:14:54,667 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 32 [2022-01-31 12:14:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:14:54,667 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-01-31 12:14:54,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-01-31 12:14:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 12:14:54,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:14:54,668 INFO L514 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, 1, 1, 1, 1, 1] [2022-01-31 12:14:54,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:14:54,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:14:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:14:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash -123059233, now seen corresponding path program 1 times [2022-01-31 12:14:54,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:14:54,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330035140] [2022-01-31 12:14:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:54,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:14:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:14:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 12:14:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:14:54,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:14:54,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330035140] [2022-01-31 12:14:54,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330035140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:14:54,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:14:54,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 12:14:54,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860577940] [2022-01-31 12:14:54,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:14:54,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 12:14:54,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:14:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 12:14:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 12:14:54,739 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:14:54,829 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-01-31 12:14:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 12:14:54,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-01-31 12:14:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:14:54,831 INFO L225 Difference]: With dead ends: 49 [2022-01-31 12:14:54,831 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 12:14:54,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 12:14:54,841 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:14:54,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:14:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 12:14:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-01-31 12:14:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:14:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-01-31 12:14:54,856 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 36 [2022-01-31 12:14:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:14:54,857 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-01-31 12:14:54,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-01-31 12:14:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 12:14:54,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:14:54,858 INFO L514 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:14:54,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 12:14:54,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:14:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:14:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash -62292927, now seen corresponding path program 1 times [2022-01-31 12:14:54,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:14:54,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557715761] [2022-01-31 12:14:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:54,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:14:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:14:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 12:14:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:14:54,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:14:54,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557715761] [2022-01-31 12:14:54,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557715761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:14:54,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894510799] [2022-01-31 12:14:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:54,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:14:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:14:54,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:14:54,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 12:14:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 12:14:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:14:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 12:14:55,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 12:14:55,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894510799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:14:55,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 12:14:55,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 12:14:55,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22489580] [2022-01-31 12:14:55,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:14:55,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 12:14:55,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:14:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 12:14:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 12:14:55,130 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:14:55,142 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-01-31 12:14:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 12:14:55,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-01-31 12:14:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:14:55,145 INFO L225 Difference]: With dead ends: 49 [2022-01-31 12:14:55,145 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 12:14:55,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 12:14:55,147 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:14:55,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:14:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 12:14:55,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-31 12:14:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:14:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-01-31 12:14:55,152 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2022-01-31 12:14:55,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:14:55,153 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-01-31 12:14:55,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-01-31 12:14:55,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 12:14:55,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:14:55,154 INFO L514 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:14:55,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 12:14:55,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:14:55,355 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:14:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:14:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2100349216, now seen corresponding path program 1 times [2022-01-31 12:14:55,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:14:55,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643747327] [2022-01-31 12:14:55,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:55,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:14:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:55,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:14:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:55,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 12:14:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:14:55,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:14:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643747327] [2022-01-31 12:14:55,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643747327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:14:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840787775] [2022-01-31 12:14:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:55,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:14:55,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:14:55,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:14:55,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 12:14:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 12:14:55,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:14:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 12:14:55,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 12:14:55,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840787775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:14:55,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 12:14:55,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-01-31 12:14:55,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114231503] [2022-01-31 12:14:55,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:14:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 12:14:55,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:14:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 12:14:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 12:14:55,586 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:14:55,651 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-01-31 12:14:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 12:14:55,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-01-31 12:14:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:14:55,653 INFO L225 Difference]: With dead ends: 73 [2022-01-31 12:14:55,654 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 12:14:55,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 12:14:55,655 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:14:55,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 178 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:14:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 12:14:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-01-31 12:14:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:14:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-01-31 12:14:55,671 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 38 [2022-01-31 12:14:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:14:55,671 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-01-31 12:14:55,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-01-31 12:14:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 12:14:55,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:14:55,672 INFO L514 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:14:55,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 12:14:55,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 12:14:55,888 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:14:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:14:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2030297792, now seen corresponding path program 1 times [2022-01-31 12:14:55,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:14:55,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197364678] [2022-01-31 12:14:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:55,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:14:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:14:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:55,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 12:14:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:14:55,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:14:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197364678] [2022-01-31 12:14:55,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197364678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:14:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702743390] [2022-01-31 12:14:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:55,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:14:55,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:14:55,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:14:55,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 12:14:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 12:14:56,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:14:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:14:56,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:14:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:14:56,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702743390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:14:56,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:14:56,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 12:14:56,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926678408] [2022-01-31 12:14:56,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:14:56,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 12:14:56,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:14:56,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 12:14:56,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 12:14:56,200 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 12:14:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:14:56,316 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-01-31 12:14:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 12:14:56,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-01-31 12:14:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:14:56,317 INFO L225 Difference]: With dead ends: 59 [2022-01-31 12:14:56,318 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 12:14:56,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 12:14:56,318 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:14:56,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 65 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:14:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 12:14:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-01-31 12:14:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:14:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-01-31 12:14:56,322 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 38 [2022-01-31 12:14:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:14:56,322 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-01-31 12:14:56,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 12:14:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-01-31 12:14:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 12:14:56,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:14:56,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1] [2022-01-31 12:14:56,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 12:14:56,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:14:56,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:14:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:14:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1977002214, now seen corresponding path program 2 times [2022-01-31 12:14:56,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:14:56,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712199023] [2022-01-31 12:14:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:14:56,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:14:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:56,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:14:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:56,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 12:14:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:14:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 12:14:56,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:14:56,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712199023] [2022-01-31 12:14:56,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712199023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:14:56,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:14:56,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 12:14:56,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709850789] [2022-01-31 12:14:56,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:14:56,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 12:14:56,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:14:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 12:14:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 12:14:56,642 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:14:56,755 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-01-31 12:14:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 12:14:56,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-31 12:14:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:14:56,757 INFO L225 Difference]: With dead ends: 69 [2022-01-31 12:14:56,757 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 12:14:56,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 12:14:56,759 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 77 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:14:56,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 62 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:14:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 12:14:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 12:14:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 12:14:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 12:14:56,767 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2022-01-31 12:14:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:14:56,767 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 12:14:56,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:14:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 12:14:56,770 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 12:14:56,773 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 12:14:56,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 12:14:56,777 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-01-31 12:14:56,779 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 12:14:56,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:14:56 BasicIcfg [2022-01-31 12:14:56,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 12:14:56,783 INFO L158 Benchmark]: Toolchain (without parser) took 3114.54ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 150.2MB in the beginning and 175.3MB in the end (delta: -25.1MB). Peak memory consumption was 15.8MB. Max. memory is 8.0GB. [2022-01-31 12:14:56,783 INFO L158 Benchmark]: CDTParser took 0.50ms. Allocated memory is still 199.2MB. Free memory was 167.1MB in the beginning and 167.0MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 12:14:56,783 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.05ms. Allocated memory is still 199.2MB. Free memory was 149.9MB in the beginning and 175.1MB in the end (delta: -25.2MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-01-31 12:14:56,783 INFO L158 Benchmark]: Boogie Preprocessor took 26.82ms. Allocated memory is still 199.2MB. Free memory was 175.1MB in the beginning and 173.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 12:14:56,783 INFO L158 Benchmark]: RCFGBuilder took 331.03ms. Allocated memory is still 199.2MB. Free memory was 173.0MB in the beginning and 157.3MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-01-31 12:14:56,784 INFO L158 Benchmark]: IcfgTransformer took 17.58ms. Allocated memory is still 199.2MB. Free memory was 157.3MB in the beginning and 155.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 12:14:56,784 INFO L158 Benchmark]: TraceAbstraction took 2503.10ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 154.7MB in the beginning and 175.3MB in the end (delta: -20.6MB). Peak memory consumption was 19.7MB. Max. memory is 8.0GB. [2022-01-31 12:14:56,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50ms. Allocated memory is still 199.2MB. Free memory was 167.1MB in the beginning and 167.0MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 229.05ms. Allocated memory is still 199.2MB. Free memory was 149.9MB in the beginning and 175.1MB in the end (delta: -25.2MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.82ms. Allocated memory is still 199.2MB. Free memory was 175.1MB in the beginning and 173.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 331.03ms. Allocated memory is still 199.2MB. Free memory was 173.0MB in the beginning and 157.3MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * IcfgTransformer took 17.58ms. Allocated memory is still 199.2MB. Free memory was 157.3MB in the beginning and 155.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 2503.10ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 154.7MB in the beginning and 175.3MB in the end (delta: -20.6MB). Peak memory consumption was 19.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 273 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 264 mSDsluCounter, 541 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 220 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 373 IncrementalHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 321 mSDtfsCounter, 373 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=5, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 340 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 368 ConstructedInterpolants, 0 QuantifiedInterpolants, 474 SizeOfPredicates, 2 NumberOfNonLiveVariables, 499 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 18/23 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 12:14:56,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...