/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/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:16:42,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:16:42,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:16:42,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:16:42,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:16:42,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:16:42,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:16:42,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:16:42,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:16:42,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:16:42,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:16:42,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:16:42,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:16:42,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:16:42,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:16:42,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:16:42,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:16:42,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:16:42,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:16:42,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:16:42,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:16:42,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:16:42,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:16:42,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:16:42,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 00:16:42,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 00:16:42,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 00:16:42,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 00:16:42,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 00:16:42,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 00:16:42,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:16:42,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:16:42,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:16:42,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:16:42,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:16:42,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:16:42,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:16:42,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:16:42,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:16:42,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:16:42,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:16:43,003 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 00:16:43,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:16:43,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:16:43,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:16:43,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:16:43,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:16:43,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:16:43,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:16:43,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:16:43,037 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:16:43,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:16:43,038 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:16:43,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:16:43,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:16:43,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:16:43,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:16:43,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:16:43,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:16:43,039 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:16:43,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:16:43,039 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:16:43,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:16:43,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:16:43,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:16:43,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:16:43,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:16:43,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:16:43,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:16:43,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:16:43,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:16:43,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:16:43,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:16:43,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:16:43,041 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:16:43,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:16:43,041 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:16:43,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:16:43,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:16:43,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:16:43,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:16:43,298 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:16:43,298 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:16:43,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/n.c24.i [2023-03-31 00:16:44,461 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:16:44,694 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:16:44,695 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2023-03-31 00:16:44,703 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4d3306fb/4297a6f551de48b2a7e9ef9b29a4ac2b/FLAGc1982c8fe [2023-03-31 00:16:44,714 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4d3306fb/4297a6f551de48b2a7e9ef9b29a4ac2b [2023-03-31 00:16:44,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:16:44,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:16:44,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:16:44,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:16:44,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:16:44,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:44,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da04037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44, skipping insertion in model container [2023-03-31 00:16:44,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:44,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:16:44,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:16:44,875 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/loops/n.c24.i[805,818] [2023-03-31 00:16:44,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:16:44,925 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:16:44,936 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/loops/n.c24.i[805,818] [2023-03-31 00:16:44,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:16:44,977 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:16:44,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44 WrapperNode [2023-03-31 00:16:44,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:16:44,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:16:44,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:16:44,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:16:44,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:44,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:44,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:44,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:45,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:45,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:45,015 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:45,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:45,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:16:45,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:16:45,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:16:45,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:16:45,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (1/1) ... [2023-03-31 00:16:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:16:45,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:45,053 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 00:16:45,058 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 00:16:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:16:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:16:45,095 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:16:45,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:16:45,095 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2023-03-31 00:16:45,095 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2023-03-31 00:16:45,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:16:45,097 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-03-31 00:16:45,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:16:45,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2023-03-31 00:16:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2023-03-31 00:16:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2023-03-31 00:16:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure index [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2023-03-31 00:16:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2023-03-31 00:16:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-03-31 00:16:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-03-31 00:16:45,257 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:16:45,265 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:16:45,564 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:16:45,569 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:16:45,570 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 00:16:45,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:16:45 BoogieIcfgContainer [2023-03-31 00:16:45,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:16:45,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:16:45,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:16:45,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:16:45,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:16:44" (1/3) ... [2023-03-31 00:16:45,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4dbcc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:16:45, skipping insertion in model container [2023-03-31 00:16:45,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:16:44" (2/3) ... [2023-03-31 00:16:45,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4dbcc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:16:45, skipping insertion in model container [2023-03-31 00:16:45,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:16:45" (3/3) ... [2023-03-31 00:16:45,579 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2023-03-31 00:16:45,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:16:45,596 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:16:45,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:16:45,642 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;@6e976dac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:16:45,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:16:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:16:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 00:16:45,650 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:45,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:45,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:45,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 1 times [2023-03-31 00:16:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:45,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068246397] [2023-03-31 00:16:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:45,876 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 00:16:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:45,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068246397] [2023-03-31 00:16:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068246397] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:16:45,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:16:45,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:16:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873630574] [2023-03-31 00:16:45,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:16:45,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:16:45,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:16:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:16:45,915 INFO L87 Difference]: Start difference. First operand has 53 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 00:16:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:46,099 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2023-03-31 00:16:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:16:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 13 [2023-03-31 00:16:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:46,108 INFO L225 Difference]: With dead ends: 98 [2023-03-31 00:16:46,108 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 00:16:46,111 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 00:16:46,114 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:46,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 10 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:16:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 00:16:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-03-31 00:16:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:16:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-03-31 00:16:46,148 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2023-03-31 00:16:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:46,148 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-03-31 00:16:46,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 00:16:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-03-31 00:16:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 00:16:46,149 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:46,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:46,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:16:46,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:46,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 1 times [2023-03-31 00:16:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:46,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730693572] [2023-03-31 00:16:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:46,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:46,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:46,264 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 00:16:46,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:46,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730693572] [2023-03-31 00:16:46,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730693572] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:16:46,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:16:46,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:16:46,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178223349] [2023-03-31 00:16:46,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:16:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:16:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:16:46,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:16:46,270 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 00:16:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:46,426 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2023-03-31 00:16:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:16:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 13 [2023-03-31 00:16:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:46,430 INFO L225 Difference]: With dead ends: 107 [2023-03-31 00:16:46,430 INFO L226 Difference]: Without dead ends: 69 [2023-03-31 00:16:46,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:16:46,439 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:46,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 12 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:16:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-03-31 00:16:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2023-03-31 00:16:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:16:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-03-31 00:16:46,470 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2023-03-31 00:16:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:46,470 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-03-31 00:16:46,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 00:16:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-03-31 00:16:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 00:16:46,471 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:46,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:46,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:16:46,471 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:46,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:46,472 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 1 times [2023-03-31 00:16:46,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:46,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108726392] [2023-03-31 00:16:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:46,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:46,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:16:46,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:46,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108726392] [2023-03-31 00:16:46,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108726392] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:16:46,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353959296] [2023-03-31 00:16:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:46,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:46,611 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 00:16:46,624 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 00:16:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:46,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 00:16:46,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:16:46,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:16:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:16:46,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353959296] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:16:46,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:16:46,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-31 00:16:46,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793699113] [2023-03-31 00:16:46,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:16:46,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:16:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:16:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:16:46,833 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:47,138 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2023-03-31 00:16:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:16:47,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-03-31 00:16:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:47,144 INFO L225 Difference]: With dead ends: 156 [2023-03-31 00:16:47,144 INFO L226 Difference]: Without dead ends: 117 [2023-03-31 00:16:47,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:16:47,147 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 268 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:47,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 12 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:16:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-03-31 00:16:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-03-31 00:16:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 97 states have internal predecessors, (129), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-31 00:16:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-03-31 00:16:47,171 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 20 [2023-03-31 00:16:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:47,171 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-03-31 00:16:47,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-03-31 00:16:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 00:16:47,173 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:47,173 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:47,184 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 00:16:47,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:47,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:47,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:47,380 INFO L85 PathProgramCache]: Analyzing trace with hash -542078090, now seen corresponding path program 2 times [2023-03-31 00:16:47,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658917758] [2023-03-31 00:16:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:47,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 00:16:47,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:47,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658917758] [2023-03-31 00:16:47,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658917758] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:16:47,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:16:47,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:16:47,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947593665] [2023-03-31 00:16:47,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:16:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:16:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:16:47,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:16:47,655 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 00:16:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:47,840 INFO L93 Difference]: Finished difference Result 204 states and 284 transitions. [2023-03-31 00:16:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:16:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 41 [2023-03-31 00:16:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:47,843 INFO L225 Difference]: With dead ends: 204 [2023-03-31 00:16:47,843 INFO L226 Difference]: Without dead ends: 199 [2023-03-31 00:16:47,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:16:47,848 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:47,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 22 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:16:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-03-31 00:16:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 118. [2023-03-31 00:16:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.336734693877551) internal successors, (131), 98 states have internal predecessors, (131), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-31 00:16:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2023-03-31 00:16:47,879 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 41 [2023-03-31 00:16:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:47,879 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2023-03-31 00:16:47,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 00:16:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2023-03-31 00:16:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-03-31 00:16:47,886 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:47,886 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 00:16:47,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:47,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 1 times [2023-03-31 00:16:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:47,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032398338] [2023-03-31 00:16:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:47,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:48,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:48,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-31 00:16:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-31 00:16:48,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:48,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032398338] [2023-03-31 00:16:48,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032398338] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:16:48,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238163112] [2023-03-31 00:16:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:48,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:48,073 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 00:16:48,076 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 00:16:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:48,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 00:16:48,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-31 00:16:48,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:16:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-31 00:16:48,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238163112] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:16:48,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:16:48,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-03-31 00:16:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044631676] [2023-03-31 00:16:48,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:16:48,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 00:16:48,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:48,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 00:16:48,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-03-31 00:16:48,312 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:16:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:48,948 INFO L93 Difference]: Finished difference Result 383 states and 553 transitions. [2023-03-31 00:16:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 00:16:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2023-03-31 00:16:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:48,952 INFO L225 Difference]: With dead ends: 383 [2023-03-31 00:16:48,952 INFO L226 Difference]: Without dead ends: 280 [2023-03-31 00:16:48,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2023-03-31 00:16:48,956 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 582 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:48,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 9 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 00:16:48,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-03-31 00:16:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2023-03-31 00:16:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 218 states have internal predecessors, (293), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-03-31 00:16:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2023-03-31 00:16:49,000 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 50 [2023-03-31 00:16:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:49,000 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2023-03-31 00:16:49,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:16:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2023-03-31 00:16:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 00:16:49,003 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:49,004 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:49,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 00:16:49,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:49,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:49,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 2 times [2023-03-31 00:16:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279918440] [2023-03-31 00:16:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:49,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:49,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-03-31 00:16:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-03-31 00:16:49,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:49,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279918440] [2023-03-31 00:16:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279918440] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:16:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312416989] [2023-03-31 00:16:49,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:16:49,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:49,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:49,521 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 00:16:49,529 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 00:16:49,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:16:49,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:16:49,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 00:16:49,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-03-31 00:16:49,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:16:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-03-31 00:16:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312416989] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:16:49,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:16:49,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2023-03-31 00:16:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672231555] [2023-03-31 00:16:49,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:16:49,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-31 00:16:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-31 00:16:49,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2023-03-31 00:16:49,913 INFO L87 Difference]: Start difference. First operand 256 states and 357 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:16:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:51,206 INFO L93 Difference]: Finished difference Result 803 states and 1183 transitions. [2023-03-31 00:16:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-03-31 00:16:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 92 [2023-03-31 00:16:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:51,212 INFO L225 Difference]: With dead ends: 803 [2023-03-31 00:16:51,212 INFO L226 Difference]: Without dead ends: 574 [2023-03-31 00:16:51,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=909, Invalid=1641, Unknown=0, NotChecked=0, Total=2550 [2023-03-31 00:16:51,215 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1384 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:51,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1384 Valid, 9 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 00:16:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-03-31 00:16:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 532. [2023-03-31 00:16:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 458 states have (on average 1.3471615720524017) internal successors, (617), 458 states have internal predecessors, (617), 69 states have call successors, (69), 6 states have call predecessors, (69), 4 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-03-31 00:16:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2023-03-31 00:16:51,266 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 92 [2023-03-31 00:16:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:51,267 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2023-03-31 00:16:51,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:16:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2023-03-31 00:16:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-03-31 00:16:51,277 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:51,277 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:51,297 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 00:16:51,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:51,481 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:51,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 3 times [2023-03-31 00:16:51,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:51,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428938039] [2023-03-31 00:16:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:51,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:52,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:52,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-03-31 00:16:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2023-03-31 00:16:52,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:52,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428938039] [2023-03-31 00:16:52,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428938039] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:16:52,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514543399] [2023-03-31 00:16:52,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:16:52,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:52,422 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 00:16:52,425 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 00:16:52,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 00:16:52,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:16:52,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 00:16:52,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2023-03-31 00:16:52,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:16:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2023-03-31 00:16:52,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514543399] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:16:52,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:16:52,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 37 [2023-03-31 00:16:52,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462049970] [2023-03-31 00:16:52,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:16:52,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-03-31 00:16:52,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-03-31 00:16:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 00:16:52,908 INFO L87 Difference]: Start difference. First operand 532 states and 753 transitions. Second operand has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 33 states have internal predecessors, (99), 6 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:17:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:17:00,644 INFO L93 Difference]: Finished difference Result 2639 states and 3948 transitions. [2023-03-31 00:17:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-03-31 00:17:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 33 states have internal predecessors, (99), 6 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 176 [2023-03-31 00:17:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:17:00,654 INFO L225 Difference]: With dead ends: 2639 [2023-03-31 00:17:00,654 INFO L226 Difference]: Without dead ends: 2153 [2023-03-31 00:17:00,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16008 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=10960, Invalid=31682, Unknown=0, NotChecked=0, Total=42642 [2023-03-31 00:17:00,667 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 00:17:00,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5111 Valid, 25 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 00:17:00,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2023-03-31 00:17:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 606. [2023-03-31 00:17:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 520 states have (on average 1.3596153846153847) internal successors, (707), 520 states have internal predecessors, (707), 81 states have call successors, (81), 6 states have call predecessors, (81), 4 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-03-31 00:17:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 867 transitions. [2023-03-31 00:17:00,755 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 867 transitions. Word has length 176 [2023-03-31 00:17:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:17:00,756 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 867 transitions. [2023-03-31 00:17:00,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 33 states have internal predecessors, (99), 6 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:17:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 867 transitions. [2023-03-31 00:17:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-03-31 00:17:00,761 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:17:00,761 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:17:00,770 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 00:17:00,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:17:00,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:17:00,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:17:00,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1852344772, now seen corresponding path program 4 times [2023-03-31 00:17:00,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:17:00,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121219502] [2023-03-31 00:17:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:17:00,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:17:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:01,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:17:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:01,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-03-31 00:17:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:01,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-03-31 00:17:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:01,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2023-03-31 00:17:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:01,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2023-03-31 00:17:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2023-03-31 00:17:01,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:17:01,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121219502] [2023-03-31 00:17:01,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121219502] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:17:01,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986680429] [2023-03-31 00:17:01,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:17:01,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:17:01,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:17:01,907 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 00:17:01,910 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 00:17:02,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:17:02,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:17:02,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 00:17:02,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:17:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2023-03-31 00:17:02,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:17:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2023-03-31 00:17:02,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986680429] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:17:02,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:17:02,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 53 [2023-03-31 00:17:02,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407437470] [2023-03-31 00:17:02,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:17:02,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-03-31 00:17:02,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:17:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-03-31 00:17:02,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2023-03-31 00:17:02,933 INFO L87 Difference]: Start difference. First operand 606 states and 867 transitions. Second operand has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:17:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:17:06,570 INFO L93 Difference]: Finished difference Result 3090 states and 4813 transitions. [2023-03-31 00:17:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-03-31 00:17:06,571 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 210 [2023-03-31 00:17:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:17:06,587 INFO L225 Difference]: With dead ends: 3090 [2023-03-31 00:17:06,587 INFO L226 Difference]: Without dead ends: 2537 [2023-03-31 00:17:06,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3834, Invalid=6672, Unknown=0, NotChecked=0, Total=10506 [2023-03-31 00:17:06,593 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3174 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3174 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 2826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 00:17:06,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3174 Valid, 7 Invalid, 2826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 00:17:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2023-03-31 00:17:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1181. [2023-03-31 00:17:06,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1020 states have (on average 1.3549019607843138) internal successors, (1382), 1020 states have internal predecessors, (1382), 156 states have call successors, (156), 6 states have call predecessors, (156), 4 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-03-31 00:17:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1692 transitions. [2023-03-31 00:17:06,743 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1692 transitions. Word has length 210 [2023-03-31 00:17:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:17:06,743 INFO L495 AbstractCegarLoop]: Abstraction has 1181 states and 1692 transitions. [2023-03-31 00:17:06,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:17:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1692 transitions. [2023-03-31 00:17:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2023-03-31 00:17:06,751 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:17:06,751 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:17:06,758 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 00:17:06,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:17:06,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:17:06,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:17:06,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1393924830, now seen corresponding path program 5 times [2023-03-31 00:17:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:17:06,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357781643] [2023-03-31 00:17:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:17:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:17:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:09,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:17:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:09,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2023-03-31 00:17:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:09,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2023-03-31 00:17:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:09,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2023-03-31 00:17:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:09,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2023-03-31 00:17:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:17:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2023-03-31 00:17:09,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:17:09,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357781643] [2023-03-31 00:17:09,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357781643] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:17:09,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255187713] [2023-03-31 00:17:09,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:17:09,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:17:09,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:17:09,957 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 00:17:09,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process