/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/heap-data/calendar.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:14:24,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:14:24,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:14:24,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:14:24,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:14:24,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:14:24,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:14:24,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:14:24,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:14:24,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:14:24,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:14:24,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:14:24,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:14:24,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:14:24,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:14:24,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:14:24,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:14:24,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:14:24,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:14:24,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:14:24,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:14:24,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:14:24,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:14:24,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:14:24,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 00:14:24,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 00:14:24,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 00:14:24,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 00:14:24,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 00:14:24,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 00:14:24,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:14:24,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:14:24,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:14:24,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:14:24,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:14:24,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:14:24,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:14:24,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:14:24,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:14:24,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:14:24,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:14:24,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:14:24,973 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:14:24,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:14:24,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:14:24,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:14:24,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:14:24,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:14:24,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:14:24,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:14:24,976 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:14:24,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:14:24,977 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:14:24,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:14:24,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:14:24,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:14:24,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:14:24,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:14:24,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:14:24,978 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:14:24,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:14:24,978 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:14:24,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:14:24,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:14:24,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:14:24,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:14:24,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:14:24,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:14:24,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:14:24,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:14:24,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:14:24,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:14:24,980 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:14:24,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:14:24,980 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:14:24,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:14:24,981 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:14:24,981 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:14:25,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:14:25,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:14:25,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:14:25,193 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:14:25,194 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:14:25,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/calendar.i [2023-03-31 00:14:26,321 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:14:26,591 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:14:26,591 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/calendar.i [2023-03-31 00:14:26,601 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b353570f8/7113407853d548c78e608a6c0431cecd/FLAGd41b2a2d6 [2023-03-31 00:14:26,946 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b353570f8/7113407853d548c78e608a6c0431cecd [2023-03-31 00:14:26,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:14:26,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:14:26,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:14:26,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:14:26,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:14:26,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:14:26" (1/1) ... [2023-03-31 00:14:26,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f31032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:26, skipping insertion in model container [2023-03-31 00:14:26,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:14:26" (1/1) ... [2023-03-31 00:14:26,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:14:26,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:14:27,248 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/calendar.i[23742,23755] [2023-03-31 00:14:27,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:14:27,264 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:14:27,298 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/calendar.i[23742,23755] [2023-03-31 00:14:27,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:14:27,323 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:14:27,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27 WrapperNode [2023-03-31 00:14:27,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:14:27,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:14:27,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:14:27,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:14:27,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:14:27,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:14:27,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:14:27,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:14:27,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (1/1) ... [2023-03-31 00:14:27,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:14:27,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:14:27,413 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) [2023-03-31 00:14:27,415 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 [2023-03-31 00:14:27,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:14:27,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:14:27,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:14:27,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 00:14:27,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 00:14:27,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:14:27,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 00:14:27,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 00:14:27,443 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 00:14:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 00:14:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 00:14:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 00:14:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 00:14:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 00:14:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 00:14:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 00:14:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 00:14:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 00:14:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 00:14:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 00:14:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 00:14:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 00:14:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 00:14:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 00:14:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 00:14:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 00:14:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:14:27,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 00:14:27,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:14:27,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:14:27,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:14:27,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:14:27,647 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:14:27,650 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:14:27,831 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:14:27,836 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:14:27,837 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 00:14:27,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:14:27 BoogieIcfgContainer [2023-03-31 00:14:27,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:14:27,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:14:27,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:14:27,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:14:27,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:14:26" (1/3) ... [2023-03-31 00:14:27,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c27287f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:14:27, skipping insertion in model container [2023-03-31 00:14:27,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:14:27" (2/3) ... [2023-03-31 00:14:27,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c27287f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:14:27, skipping insertion in model container [2023-03-31 00:14:27,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:14:27" (3/3) ... [2023-03-31 00:14:27,851 INFO L112 eAbstractionObserver]: Analyzing ICFG calendar.i [2023-03-31 00:14:27,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:14:27,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:14:27,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:14:27,919 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6947ef28, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:14:27,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:14:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:14:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 00:14:27,934 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:27,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:27,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:27,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2012343198, now seen corresponding path program 1 times [2023-03-31 00:14:27,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:27,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226409228] [2023-03-31 00:14:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:27,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:28,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:28,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:28,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226409228] [2023-03-31 00:14:28,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226409228] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:14:28,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:14:28,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:14:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921019622] [2023-03-31 00:14:28,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:14:28,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:14:28,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:14:28,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:14:28,143 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:28,207 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-03-31 00:14:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:14:28,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 00:14:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:28,216 INFO L225 Difference]: With dead ends: 41 [2023-03-31 00:14:28,216 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 00:14:28,218 INFO L412 NwaCegarLoop]: 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 [2023-03-31 00:14:28,221 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:28,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:14:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 00:14:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 00:14:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-03-31 00:14:28,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 14 [2023-03-31 00:14:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:28,252 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-03-31 00:14:28,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-03-31 00:14:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 00:14:28,253 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:28,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:28,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:14:28,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:28,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2026364753, now seen corresponding path program 1 times [2023-03-31 00:14:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:28,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713099495] [2023-03-31 00:14:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:28,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:28,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:28,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:28,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713099495] [2023-03-31 00:14:28,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713099495] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:14:28,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:14:28,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:14:28,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423297523] [2023-03-31 00:14:28,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:14:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:14:28,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:14:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:14:28,415 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:28,569 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-03-31 00:14:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:14:28,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 00:14:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:28,572 INFO L225 Difference]: With dead ends: 39 [2023-03-31 00:14:28,572 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 00:14:28,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:14:28,581 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:28,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:14:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 00:14:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 00:14:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2023-03-31 00:14:28,594 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 16 [2023-03-31 00:14:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:28,594 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2023-03-31 00:14:28,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2023-03-31 00:14:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 00:14:28,595 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:28,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:28,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:14:28,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:28,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1490528540, now seen corresponding path program 1 times [2023-03-31 00:14:28,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:28,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804944776] [2023-03-31 00:14:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:28,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:28,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:14:28,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804944776] [2023-03-31 00:14:28,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804944776] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:14:28,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:14:28,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:14:28,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076083897] [2023-03-31 00:14:28,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:14:28,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:14:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:14:28,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:14:28,770 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:28,890 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-03-31 00:14:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:14:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-03-31 00:14:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:28,893 INFO L225 Difference]: With dead ends: 42 [2023-03-31 00:14:28,893 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 00:14:28,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:14:28,900 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:28,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 17 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:14:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 00:14:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-03-31 00:14:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-03-31 00:14:28,915 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 21 [2023-03-31 00:14:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:28,915 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-03-31 00:14:28,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-03-31 00:14:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 00:14:28,917 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:28,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:28,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 00:14:28,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:28,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:28,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1488681498, now seen corresponding path program 1 times [2023-03-31 00:14:28,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:28,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894489182] [2023-03-31 00:14:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:28,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:29,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894489182] [2023-03-31 00:14:29,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894489182] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:14:29,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:14:29,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 00:14:29,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671433610] [2023-03-31 00:14:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:14:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:14:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:14:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:14:29,394 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:29,718 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2023-03-31 00:14:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 00:14:29,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-03-31 00:14:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:29,722 INFO L225 Difference]: With dead ends: 56 [2023-03-31 00:14:29,722 INFO L226 Difference]: Without dead ends: 44 [2023-03-31 00:14:29,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-03-31 00:14:29,728 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 115 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:29,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 24 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:14:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-03-31 00:14:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2023-03-31 00:14:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-03-31 00:14:29,746 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 21 [2023-03-31 00:14:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:29,747 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-03-31 00:14:29,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-03-31 00:14:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 00:14:29,748 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:29,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:29,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 00:14:29,749 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:29,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2119543870, now seen corresponding path program 1 times [2023-03-31 00:14:29,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:29,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680891916] [2023-03-31 00:14:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:29,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:30,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:30,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:30,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680891916] [2023-03-31 00:14:30,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680891916] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:14:30,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:14:30,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 00:14:30,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757481027] [2023-03-31 00:14:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:14:30,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:14:30,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:14:30,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:14:30,088 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:30,467 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-03-31 00:14:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 00:14:30,469 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-03-31 00:14:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:30,470 INFO L225 Difference]: With dead ends: 68 [2023-03-31 00:14:30,470 INFO L226 Difference]: Without dead ends: 66 [2023-03-31 00:14:30,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2023-03-31 00:14:30,471 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 164 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:30,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 34 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:14:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-03-31 00:14:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 36. [2023-03-31 00:14:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-03-31 00:14:30,482 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 23 [2023-03-31 00:14:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:30,482 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-03-31 00:14:30,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-03-31 00:14:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 00:14:30,483 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:30,484 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 00:14:30,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 00:14:30,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:30,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -878681078, now seen corresponding path program 1 times [2023-03-31 00:14:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:30,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173320005] [2023-03-31 00:14:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:30,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173320005] [2023-03-31 00:14:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173320005] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:14:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770212208] [2023-03-31 00:14:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:30,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:14:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:14:30,757 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) [2023-03-31 00:14:30,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:14:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:30,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 00:14:30,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:14:30,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:31,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:31,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:14:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:31,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770212208] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:14:31,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:14:31,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-03-31 00:14:31,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818784451] [2023-03-31 00:14:31,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:14:31,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:14:31,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:14:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:14:31,228 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:31,393 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2023-03-31 00:14:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:14:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-03-31 00:14:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:31,394 INFO L225 Difference]: With dead ends: 65 [2023-03-31 00:14:31,395 INFO L226 Difference]: Without dead ends: 41 [2023-03-31 00:14:31,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:14:31,397 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:31,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 27 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:14:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-03-31 00:14:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-03-31 00:14:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2023-03-31 00:14:31,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 29 [2023-03-31 00:14:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:31,407 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2023-03-31 00:14:31,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2023-03-31 00:14:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 00:14:31,408 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:31,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:31,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:14:31,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 00:14:31,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:31,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash -98690017, now seen corresponding path program 2 times [2023-03-31 00:14:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804429849] [2023-03-31 00:14:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:32,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:32,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804429849] [2023-03-31 00:14:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804429849] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:14:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338093999] [2023-03-31 00:14:32,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:14:32,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:14:32,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:14:32,297 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) [2023-03-31 00:14:32,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:14:32,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:14:32,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:14:32,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-31 00:14:32,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:14:32,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-03-31 00:14:32,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:14:32,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:32,588 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-03-31 00:14:32,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-03-31 00:14:32,612 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-03-31 00:14:32,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-03-31 00:14:32,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:32,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-03-31 00:14:32,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 00:14:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:32,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:14:32,990 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~l~0.base_9 Int) (v_ArrVal_176 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| v_main_~l~0.base_9 v_ArrVal_176) c_main_~l~0.base))) (or (not (= 3 (select .cse0 (+ 8 c_main_~l~0.offset)))) (not (= (select |c_#valid| v_main_~l~0.base_9) 0)) (not (= (select .cse0 (+ c_main_~l~0.offset 4)) 1))))) is different from false [2023-03-31 00:14:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-03-31 00:14:33,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338093999] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:14:33,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:14:33,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2023-03-31 00:14:33,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106861520] [2023-03-31 00:14:33,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:14:33,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 00:14:33,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 00:14:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=293, Unknown=1, NotChecked=34, Total=380 [2023-03-31 00:14:33,100 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:37,017 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2023-03-31 00:14:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-03-31 00:14:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2023-03-31 00:14:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:37,022 INFO L225 Difference]: With dead ends: 181 [2023-03-31 00:14:37,022 INFO L226 Difference]: Without dead ends: 167 [2023-03-31 00:14:37,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2019, Invalid=5994, Unknown=1, NotChecked=176, Total=8190 [2023-03-31 00:14:37,026 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 779 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:37,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 58 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 429 Invalid, 0 Unknown, 178 Unchecked, 0.4s Time] [2023-03-31 00:14:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-03-31 00:14:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 54. [2023-03-31 00:14:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-03-31 00:14:37,047 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 34 [2023-03-31 00:14:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:37,048 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-03-31 00:14:37,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-03-31 00:14:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 00:14:37,053 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:37,054 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:37,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:14:37,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-03-31 00:14:37,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:37,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1424787591, now seen corresponding path program 1 times [2023-03-31 00:14:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:37,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919911221] [2023-03-31 00:14:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:37,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:37,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:37,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:37,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919911221] [2023-03-31 00:14:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919911221] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:14:37,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295974760] [2023-03-31 00:14:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:37,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:14:37,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:14:37,910 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) [2023-03-31 00:14:37,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:14:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:38,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 52 conjunts are in the unsatisfiable core [2023-03-31 00:14:38,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:14:38,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:14:38,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-03-31 00:14:38,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:38,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:38,177 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-03-31 00:14:38,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-03-31 00:14:38,202 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-03-31 00:14:38,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-03-31 00:14:38,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-03-31 00:14:38,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 00:14:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:38,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:14:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:38,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295974760] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:14:38,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:14:38,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 19 [2023-03-31 00:14:38,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095539224] [2023-03-31 00:14:38,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:14:38,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-31 00:14:38,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-31 00:14:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-03-31 00:14:38,631 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:39,414 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2023-03-31 00:14:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 00:14:39,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-03-31 00:14:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:39,416 INFO L225 Difference]: With dead ends: 67 [2023-03-31 00:14:39,416 INFO L226 Difference]: Without dead ends: 65 [2023-03-31 00:14:39,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2023-03-31 00:14:39,417 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 191 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:39,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 57 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:14:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-03-31 00:14:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-03-31 00:14:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2023-03-31 00:14:39,426 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 36 [2023-03-31 00:14:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:39,426 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2023-03-31 00:14:39,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2023-03-31 00:14:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 00:14:39,427 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:39,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:39,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:14:39,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:14:39,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:39,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash 513224975, now seen corresponding path program 3 times [2023-03-31 00:14:39,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:39,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641076647] [2023-03-31 00:14:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:39,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:40,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:40,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641076647] [2023-03-31 00:14:40,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641076647] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:14:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64743095] [2023-03-31 00:14:40,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:14:40,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:14:40,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:14:40,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:14:40,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:14:40,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 00:14:40,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:14:40,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 54 conjunts are in the unsatisfiable core [2023-03-31 00:14:40,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:14:40,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:14:40,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:40,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:40,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-03-31 00:14:40,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:14:40,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-03-31 00:14:40,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 00:14:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:14:40,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-03-31 00:14:40,418 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-03-31 00:14:40,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-03-31 00:14:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:40,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:14:40,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:14:40,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-03-31 00:14:40,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:14:40,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-03-31 00:14:40,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-03-31 00:14:40,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-03-31 00:14:40,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:14:40,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-03-31 00:14:40,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:14:40,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-03-31 00:14:41,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:14:41,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-03-31 00:14:41,009 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:14:41,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-03-31 00:14:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:41,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64743095] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:14:41,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:14:41,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2023-03-31 00:14:41,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849757741] [2023-03-31 00:14:41,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:14:41,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 00:14:41,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 00:14:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-03-31 00:14:41,030 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:14:41,493 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2023-03-31 00:14:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 00:14:41,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-03-31 00:14:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:14:41,495 INFO L225 Difference]: With dead ends: 108 [2023-03-31 00:14:41,495 INFO L226 Difference]: Without dead ends: 66 [2023-03-31 00:14:41,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-03-31 00:14:41,496 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 121 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:14:41,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 48 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:14:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-03-31 00:14:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2023-03-31 00:14:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:41,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2023-03-31 00:14:41,507 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 42 [2023-03-31 00:14:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:14:41,508 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2023-03-31 00:14:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:14:41,508 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2023-03-31 00:14:41,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 00:14:41,509 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:14:41,510 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:14:41,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:14:41,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:14:41,719 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:14:41,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:14:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash 324403994, now seen corresponding path program 4 times [2023-03-31 00:14:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:14:41,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426045829] [2023-03-31 00:14:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:14:41,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:14:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:42,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:14:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:14:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:42,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:14:42,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426045829] [2023-03-31 00:14:42,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426045829] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:14:42,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068879249] [2023-03-31 00:14:42,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:14:42,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:14:42,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:14:42,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:14:42,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:14:42,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:14:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:14:42,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 78 conjunts are in the unsatisfiable core [2023-03-31 00:14:42,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:14:42,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-03-31 00:14:42,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:14:42,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:42,945 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-03-31 00:14:42,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-03-31 00:14:42,965 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-03-31 00:14:42,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-03-31 00:14:42,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:14:43,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-03-31 00:14:43,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:14:43,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2023-03-31 00:14:43,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:14:43,101 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-03-31 00:14:43,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-03-31 00:14:43,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2023-03-31 00:14:43,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:14:43,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-03-31 00:14:43,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 00:14:43,763 INFO L321 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-03-31 00:14:43,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 135 [2023-03-31 00:14:43,826 INFO L321 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-03-31 00:14:43,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 113 [2023-03-31 00:14:44,644 INFO L321 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-03-31 00:14:44,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2023-03-31 00:14:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:44,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:14:44,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:14:44,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2023-03-31 00:14:44,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:14:44,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2023-03-31 00:14:44,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:14:44,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 107 [2023-03-31 00:14:44,942 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:14:44,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 83 [2023-03-31 00:14:44,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2023-03-31 00:14:44,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:14:44,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 55 [2023-03-31 00:14:44,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:14:44,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2023-03-31 00:14:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:14:45,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068879249] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:14:45,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:14:45,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 25 [2023-03-31 00:14:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914710094] [2023-03-31 00:14:45,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:14:45,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 00:14:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:14:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 00:14:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=531, Unknown=1, NotChecked=0, Total=600 [2023-03-31 00:14:45,055 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:02,585 INFO L93 Difference]: Finished difference Result 338 states and 409 transitions. [2023-03-31 00:15:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2023-03-31 00:15:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 00:15:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:02,588 INFO L225 Difference]: With dead ends: 338 [2023-03-31 00:15:02,588 INFO L226 Difference]: Without dead ends: 324 [2023-03-31 00:15:02,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13584 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=6914, Invalid=26027, Unknown=1, NotChecked=0, Total=32942 [2023-03-31 00:15:02,596 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1755 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:02,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1755 Valid, 61 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 00:15:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-03-31 00:15:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 95. [2023-03-31 00:15:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.3296703296703296) internal successors, (121), 91 states have internal predecessors, (121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2023-03-31 00:15:02,611 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 47 [2023-03-31 00:15:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:02,611 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2023-03-31 00:15:02,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2023-03-31 00:15:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-31 00:15:02,612 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:02,612 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:02,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:02,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 00:15:02,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:02,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash -3760958, now seen corresponding path program 2 times [2023-03-31 00:15:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156655955] [2023-03-31 00:15:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:02,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:04,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:04,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156655955] [2023-03-31 00:15:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156655955] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608273266] [2023-03-31 00:15:04,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:15:04,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:04,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:04,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:04,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:15:04,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:15:04,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:04,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 80 conjunts are in the unsatisfiable core [2023-03-31 00:15:04,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:04,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:15:04,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-03-31 00:15:04,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:15:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:04,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2023-03-31 00:15:04,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:15:04,403 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-03-31 00:15:04,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-03-31 00:15:04,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-03-31 00:15:04,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:04,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2023-03-31 00:15:04,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:04,540 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-03-31 00:15:04,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-03-31 00:15:04,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2023-03-31 00:15:04,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:04,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-03-31 00:15:04,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 00:15:05,135 INFO L321 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-03-31 00:15:05,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 135 [2023-03-31 00:15:05,201 INFO L321 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-03-31 00:15:05,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 113 [2023-03-31 00:15:05,972 INFO L321 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-03-31 00:15:05,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2023-03-31 00:15:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:05,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:06,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:06,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2023-03-31 00:15:06,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:06,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2023-03-31 00:15:06,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:06,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 107 [2023-03-31 00:15:06,283 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:15:06,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 83 [2023-03-31 00:15:06,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2023-03-31 00:15:06,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:06,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 55 [2023-03-31 00:15:06,295 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:15:06,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2023-03-31 00:15:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:06,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608273266] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:06,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:06,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 29 [2023-03-31 00:15:06,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048152248] [2023-03-31 00:15:06,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:06,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-03-31 00:15:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-03-31 00:15:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=722, Unknown=2, NotChecked=0, Total=812 [2023-03-31 00:15:06,420 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 29 states, 29 states have (on average 3.7586206896551726) internal successors, (109), 28 states have internal predecessors, (109), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:08,743 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2023-03-31 00:15:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 00:15:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7586206896551726) internal successors, (109), 28 states have internal predecessors, (109), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-03-31 00:15:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:08,744 INFO L225 Difference]: With dead ends: 120 [2023-03-31 00:15:08,744 INFO L226 Difference]: Without dead ends: 118 [2023-03-31 00:15:08,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=533, Invalid=1721, Unknown=2, NotChecked=0, Total=2256 [2023-03-31 00:15:08,746 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 351 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:08,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 89 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 00:15:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-03-31 00:15:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2023-03-31 00:15:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.309278350515464) internal successors, (127), 97 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2023-03-31 00:15:08,759 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 49 [2023-03-31 00:15:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:08,759 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2023-03-31 00:15:08,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7586206896551726) internal successors, (109), 28 states have internal predecessors, (109), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2023-03-31 00:15:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-31 00:15:08,760 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:08,760 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:08,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:08,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:08,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:08,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash -341709558, now seen corresponding path program 5 times [2023-03-31 00:15:08,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:08,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029672438] [2023-03-31 00:15:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:08,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:09,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029672438] [2023-03-31 00:15:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029672438] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:09,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523802750] [2023-03-31 00:15:09,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:15:09,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:09,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:09,797 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:09,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:15:10,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-03-31 00:15:10,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:10,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 81 conjunts are in the unsatisfiable core [2023-03-31 00:15:10,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:10,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:15:10,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:15:10,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:15:10,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-03-31 00:15:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:10,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-03-31 00:15:10,176 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-03-31 00:15:10,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-03-31 00:15:10,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-03-31 00:15:10,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 00:15:10,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-03-31 00:15:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:10,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-03-31 00:15:10,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:10,309 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-03-31 00:15:10,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2023-03-31 00:15:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:10,322 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-03-31 00:15:10,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-03-31 00:15:10,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 00:15:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:10,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:10,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:10,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2023-03-31 00:15:10,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:10,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2023-03-31 00:15:11,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:11,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 127 [2023-03-31 00:15:11,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:11,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 118 [2023-03-31 00:15:11,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:11,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 78 [2023-03-31 00:15:11,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:11,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 54 [2023-03-31 00:15:11,582 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:15:11,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-03-31 00:15:11,594 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-03-31 00:15:11,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 26 [2023-03-31 00:15:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:15:11,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 68 [2023-03-31 00:15:11,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:11,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-03-31 00:15:11,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:15:11,617 INFO L321 Elim1Store]: treesize reduction 32, result has 11.1 percent of original size [2023-03-31 00:15:11,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 222 [2023-03-31 00:15:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:11,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523802750] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:11,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:11,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 22 [2023-03-31 00:15:11,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983511853] [2023-03-31 00:15:11,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:11,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 00:15:11,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 00:15:11,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-03-31 00:15:11,637 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:12,714 INFO L93 Difference]: Finished difference Result 203 states and 255 transitions. [2023-03-31 00:15:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 00:15:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-03-31 00:15:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:12,715 INFO L225 Difference]: With dead ends: 203 [2023-03-31 00:15:12,715 INFO L226 Difference]: Without dead ends: 114 [2023-03-31 00:15:12,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 00:15:12,717 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 148 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:12,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 75 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 00:15:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-03-31 00:15:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2023-03-31 00:15:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 102 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2023-03-31 00:15:12,730 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 55 [2023-03-31 00:15:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:12,732 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2023-03-31 00:15:12,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:12,732 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2023-03-31 00:15:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 00:15:12,733 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:12,733 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:12,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:12,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:12,940 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:12,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1081080609, now seen corresponding path program 6 times [2023-03-31 00:15:12,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:12,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764393558] [2023-03-31 00:15:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:12,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:15,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 18 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:15,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764393558] [2023-03-31 00:15:15,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764393558] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893325104] [2023-03-31 00:15:15,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-31 00:15:15,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:15,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:15,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:15,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:15:15,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-03-31 00:15:15,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:15,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 106 conjunts are in the unsatisfiable core [2023-03-31 00:15:15,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:15,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:15:15,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-03-31 00:15:15,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:15:15,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:15:15,454 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-03-31 00:15:15,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-03-31 00:15:15,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-03-31 00:15:15,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-03-31 00:15:15,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2023-03-31 00:15:15,580 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-03-31 00:15:15,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2023-03-31 00:15:15,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,602 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-03-31 00:15:15,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-03-31 00:15:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-03-31 00:15:15,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 00:15:15,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-03-31 00:15:15,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2023-03-31 00:15:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-03-31 00:15:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,798 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-03-31 00:15:15,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 83 [2023-03-31 00:15:15,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:15,811 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-03-31 00:15:15,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-03-31 00:15:15,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 00:15:17,130 INFO L321 Elim1Store]: treesize reduction 40, result has 76.3 percent of original size [2023-03-31 00:15:17,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 265 treesize of output 241 [2023-03-31 00:15:17,240 INFO L321 Elim1Store]: treesize reduction 56, result has 66.9 percent of original size [2023-03-31 00:15:17,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 105 treesize of output 189