/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 15:15:08,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 15:15:08,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 15:15:08,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 15:15:08,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 15:15:08,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 15:15:08,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 15:15:08,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 15:15:08,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 15:15:09,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 15:15:09,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 15:15:09,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 15:15:09,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 15:15:09,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 15:15:09,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 15:15:09,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 15:15:09,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 15:15:09,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 15:15:09,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 15:15:09,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 15:15:09,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 15:15:09,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 15:15:09,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 15:15:09,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 15:15:09,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-14 15:15:09,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-14 15:15:09,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-14 15:15:09,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-14 15:15:09,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-14 15:15:09,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-14 15:15:09,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 15:15:09,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 15:15:09,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 15:15:09,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 15:15:09,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 15:15:09,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 15:15:09,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 15:15:09,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 15:15:09,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 15:15:09,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 15:15:09,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 15:15:09,030 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 [2022-02-14 15:15:09,053 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 15:15:09,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 15:15:09,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 15:15:09,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 15:15:09,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 15:15:09,054 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 15:15:09,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 15:15:09,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 15:15:09,055 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 15:15:09,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 15:15:09,055 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 15:15:09,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 15:15:09,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 15:15:09,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 15:15:09,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 15:15:09,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 15:15:09,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 15:15:09,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 15:15:09,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 15:15:09,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 15:15:09,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 15:15:09,057 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 15:15:09,057 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 15:15:09,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 15:15:09,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 15:15:09,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 15:15:09,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 15:15:09,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 15:15:09,281 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 15:15:09,281 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 15:15:09,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-02-14 15:15:09,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47eb7f2c3/1dee0e8d60e849249cd293bd95d6dcfe/FLAGa83d353e7 [2022-02-14 15:15:09,707 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 15:15:09,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-02-14 15:15:09,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47eb7f2c3/1dee0e8d60e849249cd293bd95d6dcfe/FLAGa83d353e7 [2022-02-14 15:15:09,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47eb7f2c3/1dee0e8d60e849249cd293bd95d6dcfe [2022-02-14 15:15:09,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 15:15:09,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 15:15:09,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 15:15:09,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 15:15:09,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 15:15:09,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:09,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@786705b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09, skipping insertion in model container [2022-02-14 15:15:09,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:09,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 15:15:09,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 15:15:09,893 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-02-14 15:15:09,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 15:15:09,925 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 15:15:09,933 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-02-14 15:15:09,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 15:15:09,958 INFO L208 MainTranslator]: Completed translation [2022-02-14 15:15:09,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09 WrapperNode [2022-02-14 15:15:09,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 15:15:09,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 15:15:09,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 15:15:09,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 15:15:09,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:09,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:09,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:09,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:10,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:10,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:10,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:10,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 15:15:10,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 15:15:10,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 15:15:10,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 15:15:10,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (1/1) ... [2022-02-14 15:15:10,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 15:15:10,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:15:10,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 15:15:10,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 15:15:10,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 15:15:10,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 15:15:10,072 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 15:15:10,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 15:15:10,073 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2022-02-14 15:15:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-02-14 15:15:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 15:15:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-02-14 15:15:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 15:15:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 15:15:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-02-14 15:15:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2022-02-14 15:15:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2022-02-14 15:15:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure index [2022-02-14 15:15:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2022-02-14 15:15:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 15:15:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 15:15:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 15:15:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 15:15:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-02-14 15:15:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-02-14 15:15:10,204 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 15:15:10,205 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 15:15:10,362 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 15:15:10,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 15:15:10,367 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-14 15:15:10,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 03:15:10 BoogieIcfgContainer [2022-02-14 15:15:10,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 15:15:10,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 15:15:10,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 15:15:10,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 15:15:10,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 03:15:09" (1/3) ... [2022-02-14 15:15:10,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e98b06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 03:15:10, skipping insertion in model container [2022-02-14 15:15:10,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:15:09" (2/3) ... [2022-02-14 15:15:10,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e98b06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 03:15:10, skipping insertion in model container [2022-02-14 15:15:10,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 03:15:10" (3/3) ... [2022-02-14 15:15:10,373 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-02-14 15:15:10,376 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 15:15:10,376 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 15:15:10,404 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 15:15:10,408 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 15:15:10,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 15:15:10,419 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) [2022-02-14 15:15:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 15:15:10,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:10,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:15:10,422 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:10,426 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 1 times [2022-02-14 15:15:10,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:10,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43401161] [2022-02-14 15:15:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:10,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:15:10,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:10,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43401161] [2022-02-14 15:15:10,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43401161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 15:15:10,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 15:15:10,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 15:15:10,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383663493] [2022-02-14 15:15:10,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 15:15:10,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 15:15:10,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:15:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 15:15:10,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 15:15:10,574 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) [2022-02-14 15:15:10,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:15:10,650 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-02-14 15:15:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 15:15:10,652 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 [2022-02-14 15:15:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:15:10,659 INFO L225 Difference]: With dead ends: 98 [2022-02-14 15:15:10,659 INFO L226 Difference]: Without dead ends: 46 [2022-02-14 15:15:10,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 15:15:10,670 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 51 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 15:15:10,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 65 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 15:15:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-14 15:15:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-14 15:15:10,704 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) [2022-02-14 15:15:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-02-14 15:15:10,720 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2022-02-14 15:15:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:15:10,720 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-02-14 15:15:10,720 INFO L471 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) [2022-02-14 15:15:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-02-14 15:15:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 15:15:10,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:10,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:15:10,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 15:15:10,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 1 times [2022-02-14 15:15:10,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:10,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81674261] [2022-02-14 15:15:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:10,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:15:10,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:10,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81674261] [2022-02-14 15:15:10,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81674261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 15:15:10,815 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 15:15:10,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 15:15:10,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351655563] [2022-02-14 15:15:10,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 15:15:10,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 15:15:10,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:15:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 15:15:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 15:15:10,817 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) [2022-02-14 15:15:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:15:10,904 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2022-02-14 15:15:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 15:15:10,904 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 [2022-02-14 15:15:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:15:10,905 INFO L225 Difference]: With dead ends: 107 [2022-02-14 15:15:10,905 INFO L226 Difference]: Without dead ends: 69 [2022-02-14 15:15:10,906 INFO L932 BasicCegarLoop]: 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 [2022-02-14 15:15:10,907 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:15:10,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 53 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:15:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-14 15:15:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-02-14 15:15:10,915 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) [2022-02-14 15:15:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-02-14 15:15:10,916 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2022-02-14 15:15:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:15:10,916 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-02-14 15:15:10,917 INFO L471 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) [2022-02-14 15:15:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-02-14 15:15:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-14 15:15:10,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:10,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:15:10,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 15:15:10,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 1 times [2022-02-14 15:15:10,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:10,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955945343] [2022-02-14 15:15:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:10,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 15:15:10,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:10,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955945343] [2022-02-14 15:15:10,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955945343] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:15:10,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482278103] [2022-02-14 15:15:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:10,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:10,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:15:10,968 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:15:11,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 15:15:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:11,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-14 15:15:11,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:15:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 15:15:11,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:15:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 15:15:11,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482278103] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:15:11,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:15:11,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-14 15:15:11,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873077192] [2022-02-14 15:15:11,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:15:11,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 15:15:11,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:15:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 15:15:11,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-14 15:15:11,162 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) [2022-02-14 15:15:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:15:11,353 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2022-02-14 15:15:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 15:15:11,353 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 [2022-02-14 15:15:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:15:11,355 INFO L225 Difference]: With dead ends: 156 [2022-02-14 15:15:11,355 INFO L226 Difference]: Without dead ends: 117 [2022-02-14 15:15:11,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-02-14 15:15:11,356 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 263 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:15:11,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 53 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:15:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-02-14 15:15:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-02-14 15:15:11,367 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) [2022-02-14 15:15:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2022-02-14 15:15:11,368 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 20 [2022-02-14 15:15:11,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:15:11,368 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2022-02-14 15:15:11,368 INFO L471 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) [2022-02-14 15:15:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2022-02-14 15:15:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 15:15:11,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:11,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:15:11,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 15:15:11,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:11,587 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash -542078090, now seen corresponding path program 2 times [2022-02-14 15:15:11,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:11,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736397355] [2022-02-14 15:15:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:11,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:11,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:15:11,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:11,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736397355] [2022-02-14 15:15:11,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736397355] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 15:15:11,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 15:15:11,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 15:15:11,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90769279] [2022-02-14 15:15:11,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 15:15:11,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 15:15:11,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:15:11,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 15:15:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 15:15:11,724 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) [2022-02-14 15:15:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:15:11,870 INFO L93 Difference]: Finished difference Result 204 states and 284 transitions. [2022-02-14 15:15:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 15:15:11,870 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 [2022-02-14 15:15:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:15:11,873 INFO L225 Difference]: With dead ends: 204 [2022-02-14 15:15:11,873 INFO L226 Difference]: Without dead ends: 199 [2022-02-14 15:15:11,874 INFO L932 BasicCegarLoop]: 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 [2022-02-14 15:15:11,879 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:15:11,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 69 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:15:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-14 15:15:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 118. [2022-02-14 15:15:11,895 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) [2022-02-14 15:15:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2022-02-14 15:15:11,896 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 41 [2022-02-14 15:15:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:15:11,896 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2022-02-14 15:15:11,896 INFO L471 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) [2022-02-14 15:15:11,896 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2022-02-14 15:15:11,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 15:15:11,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:11,897 INFO L514 BasicCegarLoop]: 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] [2022-02-14 15:15:11,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 15:15:11,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 1 times [2022-02-14 15:15:11,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:11,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144287665] [2022-02-14 15:15:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:11,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:11,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:15:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-02-14 15:15:12,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:12,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144287665] [2022-02-14 15:15:12,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144287665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:15:12,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300424700] [2022-02-14 15:15:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:12,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:12,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:15:12,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:15:12,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 15:15:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 15:15:12,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:15:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-02-14 15:15:12,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:15:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-02-14 15:15:12,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300424700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:15:12,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:15:12,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-02-14 15:15:12,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161384143] [2022-02-14 15:15:12,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:15:12,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 15:15:12,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:15:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 15:15:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-02-14 15:15:12,375 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) [2022-02-14 15:15:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:15:12,942 INFO L93 Difference]: Finished difference Result 383 states and 553 transitions. [2022-02-14 15:15:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 15:15:12,943 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 [2022-02-14 15:15:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:15:12,945 INFO L225 Difference]: With dead ends: 383 [2022-02-14 15:15:12,945 INFO L226 Difference]: Without dead ends: 280 [2022-02-14 15:15:12,946 INFO L932 BasicCegarLoop]: 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 [2022-02-14 15:15:12,946 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 568 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:15:12,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 49 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:15:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-14 15:15:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2022-02-14 15:15:12,961 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) [2022-02-14 15:15:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2022-02-14 15:15:12,963 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 50 [2022-02-14 15:15:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:15:12,963 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2022-02-14 15:15:12,964 INFO L471 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) [2022-02-14 15:15:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2022-02-14 15:15:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-14 15:15:12,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:12,966 INFO L514 BasicCegarLoop]: 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] [2022-02-14 15:15:12,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 15:15:13,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:13,201 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:13,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 2 times [2022-02-14 15:15:13,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:13,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313958972] [2022-02-14 15:15:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:13,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:13,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:13,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:15:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-02-14 15:15:13,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:13,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313958972] [2022-02-14 15:15:13,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313958972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:15:13,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056149659] [2022-02-14 15:15:13,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:15:13,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:15:13,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:15:13,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 15:15:13,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:15:13,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:15:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 15:15:13,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:15:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-02-14 15:15:13,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:15:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-02-14 15:15:13,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056149659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:15:13,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:15:13,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-02-14 15:15:13,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162353071] [2022-02-14 15:15:13,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:15:13,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-14 15:15:13,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:15:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-14 15:15:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-02-14 15:15:13,923 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) [2022-02-14 15:15:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:15:15,054 INFO L93 Difference]: Finished difference Result 803 states and 1183 transitions. [2022-02-14 15:15:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 15:15:15,055 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 [2022-02-14 15:15:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:15:15,058 INFO L225 Difference]: With dead ends: 803 [2022-02-14 15:15:15,058 INFO L226 Difference]: Without dead ends: 574 [2022-02-14 15:15:15,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=909, Invalid=1641, Unknown=0, NotChecked=0, Total=2550 [2022-02-14 15:15:15,060 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1354 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 15:15:15,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 49 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 15:15:15,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-02-14 15:15:15,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 532. [2022-02-14 15:15:15,103 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) [2022-02-14 15:15:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2022-02-14 15:15:15,105 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 92 [2022-02-14 15:15:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:15:15,105 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2022-02-14 15:15:15,106 INFO L471 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) [2022-02-14 15:15:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2022-02-14 15:15:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-02-14 15:15:15,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:15,109 INFO L514 BasicCegarLoop]: 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] [2022-02-14 15:15:15,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 15:15:15,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:15,327 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:15,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:15,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 3 times [2022-02-14 15:15:15,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:15,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964892116] [2022-02-14 15:15:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:15,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:15,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:15,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-02-14 15:15:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-02-14 15:15:15,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:15,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964892116] [2022-02-14 15:15:15,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964892116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:15:15,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779750585] [2022-02-14 15:15:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:15:15,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:15:15,714 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) [2022-02-14 15:15:15,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 15:15:15,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-14 15:15:15,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:15:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 15:15:15,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:15:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-02-14 15:15:16,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:15:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-02-14 15:15:16,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779750585] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:15:16,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:15:16,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 35 [2022-02-14 15:15:16,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508020676] [2022-02-14 15:15:16,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:15:16,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-14 15:15:16,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:15:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-14 15:15:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2022-02-14 15:15:16,345 INFO L87 Difference]: Start difference. First operand 532 states and 753 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:15:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:15:23,292 INFO L93 Difference]: Finished difference Result 2639 states and 3948 transitions. [2022-02-14 15:15:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-02-14 15:15:23,293 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 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 [2022-02-14 15:15:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:15:23,305 INFO L225 Difference]: With dead ends: 2639 [2022-02-14 15:15:23,305 INFO L226 Difference]: Without dead ends: 2153 [2022-02-14 15:15:23,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16044 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10951, Invalid=30869, Unknown=0, NotChecked=0, Total=41820 [2022-02-14 15:15:23,313 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 4721 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4418 mSolverCounterSat, 2670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4721 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 7088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2670 IncrementalHoareTripleChecker+Valid, 4418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:15:23,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4721 Valid, 61 Invalid, 7088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2670 Valid, 4418 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-14 15:15:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-02-14 15:15:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 606. [2022-02-14 15:15:23,368 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) [2022-02-14 15:15:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 867 transitions. [2022-02-14 15:15:23,372 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 867 transitions. Word has length 176 [2022-02-14 15:15:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:15:23,373 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 867 transitions. [2022-02-14 15:15:23,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:15:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 867 transitions. [2022-02-14 15:15:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-02-14 15:15:23,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:23,377 INFO L514 BasicCegarLoop]: 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] [2022-02-14 15:15:23,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-14 15:15:23,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:23,611 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1852344772, now seen corresponding path program 4 times [2022-02-14 15:15:23,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:23,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856577069] [2022-02-14 15:15:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:23,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:23,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-02-14 15:15:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:23,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-02-14 15:15:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:23,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-02-14 15:15:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:23,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-02-14 15:15:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-02-14 15:15:23,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:23,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856577069] [2022-02-14 15:15:23,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856577069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:15:23,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817565970] [2022-02-14 15:15:23,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:15:23,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:23,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:15:23,967 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) [2022-02-14 15:15:23,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 15:15:24,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:15:24,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:15:24,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-14 15:15:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:15:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-02-14 15:15:24,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:15:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-02-14 15:15:25,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817565970] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:15:25,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:15:25,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 53 [2022-02-14 15:15:25,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021025433] [2022-02-14 15:15:25,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:15:25,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-14 15:15:25,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:15:25,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-14 15:15:25,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-02-14 15:15:25,331 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) [2022-02-14 15:15:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:15:28,311 INFO L93 Difference]: Finished difference Result 3090 states and 4813 transitions. [2022-02-14 15:15:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-14 15:15:28,311 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 [2022-02-14 15:15:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:15:28,319 INFO L225 Difference]: With dead ends: 3090 [2022-02-14 15:15:28,319 INFO L226 Difference]: Without dead ends: 2537 [2022-02-14 15:15:28,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3834, Invalid=6672, Unknown=0, NotChecked=0, Total=10506 [2022-02-14 15:15:28,322 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2869 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2869 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:15:28,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2869 Valid, 51 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 2550 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-14 15:15:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-02-14 15:15:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1181. [2022-02-14 15:15:28,409 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) [2022-02-14 15:15:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1692 transitions. [2022-02-14 15:15:28,413 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1692 transitions. Word has length 210 [2022-02-14 15:15:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:15:28,414 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1692 transitions. [2022-02-14 15:15:28,414 INFO L471 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) [2022-02-14 15:15:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1692 transitions. [2022-02-14 15:15:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-02-14 15:15:28,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:15:28,421 INFO L514 BasicCegarLoop]: 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] [2022-02-14 15:15:28,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-14 15:15:28,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:28,638 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:15:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:15:28,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1393924830, now seen corresponding path program 5 times [2022-02-14 15:15:28,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:15:28,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447653014] [2022-02-14 15:15:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:15:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:15:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:29,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:15:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:29,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2022-02-14 15:15:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2022-02-14 15:15:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2022-02-14 15:15:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:29,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2022-02-14 15:15:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:15:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-02-14 15:15:29,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:15:29,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447653014] [2022-02-14 15:15:29,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447653014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:15:29,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138626800] [2022-02-14 15:15:29,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:15:29,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:15:29,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:15:29,607 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) [2022-02-14 15:15:29,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 15:16:21,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-02-14 15:16:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:16:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-14 15:16:21,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:16:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-02-14 15:16:21,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:16:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-02-14 15:16:23,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138626800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:16:23,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:16:23,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 103 [2022-02-14 15:16:23,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553425392] [2022-02-14 15:16:23,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:16:23,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-14 15:16:23,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:16:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-14 15:16:23,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2022-02-14 15:16:23,776 INFO L87 Difference]: Start difference. First operand 1181 states and 1692 transitions. Second operand has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 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) [2022-02-14 15:16:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:16:35,338 INFO L93 Difference]: Finished difference Result 6115 states and 9538 transitions. [2022-02-14 15:16:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-14 15:16:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 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 385 [2022-02-14 15:16:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:16:35,354 INFO L225 Difference]: With dead ends: 6115 [2022-02-14 15:16:35,354 INFO L226 Difference]: Without dead ends: 5037 [2022-02-14 15:16:35,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6510 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15159, Invalid=25847, Unknown=0, NotChecked=0, Total=41006 [2022-02-14 15:16:35,359 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 5759 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5576 mSolverCounterSat, 2789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5759 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 8365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2789 IncrementalHoareTripleChecker+Valid, 5576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-14 15:16:35,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5759 Valid, 51 Invalid, 8365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2789 Valid, 5576 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-14 15:16:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2022-02-14 15:16:35,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 2331. [2022-02-14 15:16:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2020 states have (on average 1.3524752475247526) internal successors, (2732), 2020 states have internal predecessors, (2732), 306 states have call successors, (306), 6 states have call predecessors, (306), 4 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2022-02-14 15:16:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3342 transitions. [2022-02-14 15:16:35,511 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3342 transitions. Word has length 385 [2022-02-14 15:16:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:16:35,512 INFO L470 AbstractCegarLoop]: Abstraction has 2331 states and 3342 transitions. [2022-02-14 15:16:35,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 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) [2022-02-14 15:16:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3342 transitions. [2022-02-14 15:16:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-02-14 15:16:35,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:16:35,524 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:16:35,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 15:16:35,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:16:35,749 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:16:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:16:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1307429062, now seen corresponding path program 6 times [2022-02-14 15:16:35,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:16:35,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990530023] [2022-02-14 15:16:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:16:35,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:16:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:16:39,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:16:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:16:39,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 693 [2022-02-14 15:16:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:16:39,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 702 [2022-02-14 15:16:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:16:39,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 711 [2022-02-14 15:16:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:16:39,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 720 [2022-02-14 15:16:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:16:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 24309 trivial. 0 not checked. [2022-02-14 15:16:39,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:16:39,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990530023] [2022-02-14 15:16:39,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990530023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:16:39,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136900118] [2022-02-14 15:16:39,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:16:39,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:16:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:16:39,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:16:39,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 15:16:39,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-02-14 15:16:39,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:16:39,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 15:16:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:16:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 680 proven. 40 refuted. 0 times theorem prover too weak. 33193 trivial. 0 not checked. [2022-02-14 15:16:40,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:16:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 680 proven. 40 refuted. 0 times theorem prover too weak. 33193 trivial. 0 not checked. [2022-02-14 15:16:41,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136900118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:16:41,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:16:41,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 10, 10] total 117 [2022-02-14 15:16:41,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654870346] [2022-02-14 15:16:41,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:16:41,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-14 15:16:41,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:16:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-14 15:16:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5130, Invalid=8442, Unknown=0, NotChecked=0, Total=13572 [2022-02-14 15:16:41,879 INFO L87 Difference]: Start difference. First operand 2331 states and 3342 transitions. Second operand has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:24:06,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:24:06,184 INFO L93 Difference]: Finished difference Result 23041 states and 35166 transitions. [2022-02-14 15:24:06,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2022-02-14 15:24:06,184 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 735 [2022-02-14 15:24:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:24:06,254 INFO L225 Difference]: With dead ends: 23041 [2022-02-14 15:24:06,254 INFO L226 Difference]: Without dead ends: 20905 [2022-02-14 15:24:06,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3886 GetRequests, 2168 SyntacticMatches, 1 SemanticMatches, 1717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605796 ImplicationChecksByTransitivity, 104.2s TimeCoverageRelationStatistics Valid=715091, Invalid=2238151, Unknown=0, NotChecked=0, Total=2953242 [2022-02-14 15:24:06,550 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 42635 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37287 mSolverCounterSat, 35138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42635 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 72425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 35138 IncrementalHoareTripleChecker+Valid, 37287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:24:06,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42635 Valid, 69 Invalid, 72425 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [35138 Valid, 37287 Invalid, 0 Unknown, 0 Unchecked, 24.1s Time] [2022-02-14 15:24:06,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2022-02-14 15:24:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 2456. [2022-02-14 15:24:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2124 states have (on average 1.3582862523540489) internal successors, (2885), 2124 states have internal predecessors, (2885), 327 states have call successors, (327), 6 states have call predecessors, (327), 4 states have return successors, (325), 325 states have call predecessors, (325), 325 states have call successors, (325) [2022-02-14 15:24:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3537 transitions. [2022-02-14 15:24:06,906 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3537 transitions. Word has length 735 [2022-02-14 15:24:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:24:06,907 INFO L470 AbstractCegarLoop]: Abstraction has 2456 states and 3537 transitions. [2022-02-14 15:24:06,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:24:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3537 transitions. [2022-02-14 15:24:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2022-02-14 15:24:06,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:24:06,923 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:24:06,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 15:24:07,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:24:07,141 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:24:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:24:07,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1612016700, now seen corresponding path program 7 times [2022-02-14 15:24:07,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:24:07,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75079172] [2022-02-14 15:24:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:24:07,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:24:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:24:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2022-02-14 15:24:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 709 [2022-02-14 15:24:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2022-02-14 15:24:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 727 [2022-02-14 15:24:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2022-02-14 15:24:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 745 [2022-02-14 15:24:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 754 [2022-02-14 15:24:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 763 [2022-02-14 15:24:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 772 [2022-02-14 15:24:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 781 [2022-02-14 15:24:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-02-14 15:24:10,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:24:10,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75079172] [2022-02-14 15:24:10,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75079172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:24:10,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80893398] [2022-02-14 15:24:10,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:24:10,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:24:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:24:10,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:24:10,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 15:24:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:24:10,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 2972 conjuncts, 101 conjunts are in the unsatisfiable core [2022-02-14 15:24:10,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:24:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-02-14 15:24:11,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:24:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-02-14 15:24:21,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80893398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:24:21,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:24:21,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 102, 102] total 205 [2022-02-14 15:24:21,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613561346] [2022-02-14 15:24:21,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:24:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-02-14 15:24:21,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:24:21,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-02-14 15:24:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20507, Invalid=21313, Unknown=0, NotChecked=0, Total=41820 [2022-02-14 15:24:21,310 INFO L87 Difference]: Start difference. First operand 2456 states and 3537 transitions. Second operand has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 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) [2022-02-14 15:25:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:25:57,698 INFO L93 Difference]: Finished difference Result 22792 states and 36475 transitions. [2022-02-14 15:25:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-02-14 15:25:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 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 796 [2022-02-14 15:25:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:25:57,746 INFO L225 Difference]: With dead ends: 22792 [2022-02-14 15:25:57,746 INFO L226 Difference]: Without dead ends: 20541 [2022-02-14 15:25:57,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1918 GetRequests, 1513 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26043 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=61518, Invalid=103724, Unknown=0, NotChecked=0, Total=165242 [2022-02-14 15:25:57,766 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 12720 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11895 mSolverCounterSat, 6532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12720 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 18427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6532 IncrementalHoareTripleChecker+Valid, 11895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:25:57,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12720 Valid, 57 Invalid, 18427 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6532 Valid, 11895 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-02-14 15:25:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20541 states. [2022-02-14 15:25:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20541 to 4779. [2022-02-14 15:25:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4144 states have (on average 1.3542471042471043) internal successors, (5612), 4144 states have internal predecessors, (5612), 630 states have call successors, (630), 6 states have call predecessors, (630), 4 states have return successors, (628), 628 states have call predecessors, (628), 628 states have call successors, (628) [2022-02-14 15:25:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 6870 transitions. [2022-02-14 15:25:58,439 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 6870 transitions. Word has length 796 [2022-02-14 15:25:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:25:58,440 INFO L470 AbstractCegarLoop]: Abstraction has 4779 states and 6870 transitions. [2022-02-14 15:25:58,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 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) [2022-02-14 15:25:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 6870 transitions. [2022-02-14 15:25:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1504 [2022-02-14 15:25:58,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:25:58,462 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 200, 200, 200, 200, 200, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:25:58,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 15:25:58,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 15:25:58,683 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:25:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:25:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -222983282, now seen corresponding path program 8 times [2022-02-14 15:25:58,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:25:58,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457914802] [2022-02-14 15:25:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:25:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:25:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:26:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1407 [2022-02-14 15:26:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1416 [2022-02-14 15:26:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1425 [2022-02-14 15:26:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1434 [2022-02-14 15:26:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1443 [2022-02-14 15:26:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1452 [2022-02-14 15:26:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1461 [2022-02-14 15:26:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1470 [2022-02-14 15:26:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1479 [2022-02-14 15:26:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1488 [2022-02-14 15:26:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:26:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-02-14 15:26:10,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:26:10,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457914802] [2022-02-14 15:26:10,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457914802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:26:10,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951143932] [2022-02-14 15:26:10,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:26:10,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:26:10,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:26:10,704 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:26:10,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 15:26:11,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:26:11,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:26:11,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 5598 conjuncts, 202 conjunts are in the unsatisfiable core [2022-02-14 15:26:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:26:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-02-14 15:26:13,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:26:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-02-14 15:26:46,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951143932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:26:46,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:26:46,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [205, 203, 203] total 407 [2022-02-14 15:26:46,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178180510] [2022-02-14 15:26:46,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:26:46,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 407 states [2022-02-14 15:26:46,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:26:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 407 interpolants. [2022-02-14 15:26:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81814, Invalid=83428, Unknown=0, NotChecked=0, Total=165242 [2022-02-14 15:26:46,735 INFO L87 Difference]: Start difference. First operand 4779 states and 6870 transitions. Second operand has 407 states, 407 states have (on average 2.039312039312039) internal successors, (830), 405 states have internal predecessors, (830), 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)