/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/heap-data/calendar.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:56:21,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:56:21,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:56:21,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:56:21,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:56:21,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:56:21,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:56:21,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:56:21,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:56:21,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:56:21,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:56:21,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:56:21,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:56:21,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:56:21,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:56:21,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:56:21,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:56:21,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:56:21,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:56:21,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:56:21,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:56:21,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:56:21,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:56:21,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:56:21,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:56:21,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:56:21,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:56:21,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:56:21,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:56:21,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:56:21,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:56:21,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:56:21,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:56:21,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:56:21,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:56:21,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:56:21,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:56:21,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:56:21,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:56:21,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:56:21,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:56:21,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:56:21,945 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:56:21,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:56:21,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:56:21,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:56:21,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:56:21,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:56:21,947 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:56:21,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:56:21,947 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:56:21,947 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:56:21,948 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:56:21,948 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:56:21,948 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:56:21,948 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:56:21,949 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:56:21,949 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:56:21,949 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:56:21,949 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:56:21,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:56:21,950 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:56:21,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:56:21,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:56:21,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:56:21,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:56:21,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:56:21,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:56:21,951 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:56:21,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:56:21,951 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:56:21,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:56:21,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:56:21,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:56:21,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:56:21,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:56:21,952 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:56:21,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:56:21,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:56:21,952 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:56:21,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:56:21,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:56:21,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:56:21,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:56:22,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:56:22,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:56:22,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:56:22,242 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:56:22,243 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:56:22,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/calendar.i [2023-04-01 04:56:23,498 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:56:23,775 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:56:23,775 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/calendar.i [2023-04-01 04:56:23,788 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ee88640/e18dbeac796c45bd8f963a31f30cdd61/FLAGd70d5124e [2023-04-01 04:56:23,801 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ee88640/e18dbeac796c45bd8f963a31f30cdd61 [2023-04-01 04:56:23,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:56:23,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:56:23,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:56:23,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:56:23,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:56:23,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:56:23" (1/1) ... [2023-04-01 04:56:23,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9f6c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:23, skipping insertion in model container [2023-04-01 04:56:23,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:56:23" (1/1) ... [2023-04-01 04:56:23,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:56:23,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:56:24,090 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/calendar.i[23742,23755] [2023-04-01 04:56:24,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:56:24,105 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:56:24,138 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/calendar.i[23742,23755] [2023-04-01 04:56:24,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:56:24,172 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:56:24,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24 WrapperNode [2023-04-01 04:56:24,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:56:24,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:56:24,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:56:24,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:56:24,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:56:24,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:56:24,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:56:24,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:56:24,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (1/1) ... [2023-04-01 04:56:24,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:56:24,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:56:24,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:56:24,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:56:24,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:56:24,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:56:24,307 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:56:24,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 04:56:24,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 04:56:24,307 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:56:24,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:56:24,307 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:56:24,308 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:56:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:56:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:56:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:56:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:56:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:56:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:56:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:56:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:56:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:56:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:56:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:56:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:56:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:56:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:56:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:56:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:56:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:56:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:56:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:56:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:56:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:56:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:56:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:56:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:56:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:56:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:56:24,512 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:56:24,514 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:56:24,709 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:56:24,765 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:56:24,765 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 04:56:24,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:56:24 BoogieIcfgContainer [2023-04-01 04:56:24,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:56:24,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:56:24,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:56:24,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:56:24,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:56:23" (1/3) ... [2023-04-01 04:56:24,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a1b139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:56:24, skipping insertion in model container [2023-04-01 04:56:24,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:56:24" (2/3) ... [2023-04-01 04:56:24,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a1b139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:56:24, skipping insertion in model container [2023-04-01 04:56:24,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:56:24" (3/3) ... [2023-04-01 04:56:24,775 INFO L112 eAbstractionObserver]: Analyzing ICFG calendar.i [2023-04-01 04:56:24,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:56:24,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:56:24,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:56:24,858 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2488fa75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:56:24,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:56:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:56:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 04:56:24,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:24,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:24,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:24,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash 259723485, now seen corresponding path program 1 times [2023-04-01 04:56:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:24,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171407379] [2023-04-01 04:56:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:24,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:25,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171407379] [2023-04-01 04:56:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171407379] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:56:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:56:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:56:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065870185] [2023-04-01 04:56:25,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:56:25,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:56:25,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:56:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:56:25,052 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:56:25,096 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-04-01 04:56:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:56:25,099 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 04:56:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:56:25,105 INFO L225 Difference]: With dead ends: 28 [2023-04-01 04:56:25,105 INFO L226 Difference]: Without dead ends: 16 [2023-04-01 04:56:25,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:56:25,111 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:56:25,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:56:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-01 04:56:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-01 04:56:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-04-01 04:56:25,140 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2023-04-01 04:56:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:56:25,140 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-04-01 04:56:25,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-04-01 04:56:25,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 04:56:25,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:25,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:25,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:56:25,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:25,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:25,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1074057038, now seen corresponding path program 1 times [2023-04-01 04:56:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:25,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160381164] [2023-04-01 04:56:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:25,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:25,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160381164] [2023-04-01 04:56:25,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160381164] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:56:25,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:56:25,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:56:25,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72174461] [2023-04-01 04:56:25,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:56:25,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:56:25,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:56:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:56:25,383 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:56:25,434 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-04-01 04:56:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:56:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 04:56:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:56:25,436 INFO L225 Difference]: With dead ends: 28 [2023-04-01 04:56:25,436 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 04:56:25,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:56:25,447 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:56:25,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:56:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 04:56:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 04:56:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-04-01 04:56:25,453 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-04-01 04:56:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:56:25,453 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-04-01 04:56:25,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-04-01 04:56:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 04:56:25,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:25,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:25,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:56:25,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:25,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:25,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1233580613, now seen corresponding path program 1 times [2023-04-01 04:56:25,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:25,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009446874] [2023-04-01 04:56:25,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:25,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:26,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:26,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009446874] [2023-04-01 04:56:26,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009446874] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:56:26,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:56:26,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:56:26,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475230361] [2023-04-01 04:56:26,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:56:26,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:56:26,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:56:26,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:56:26,289 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:56:26,506 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-04-01 04:56:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:56:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 04:56:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:56:26,509 INFO L225 Difference]: With dead ends: 39 [2023-04-01 04:56:26,509 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 04:56:26,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:56:26,516 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:56:26,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 77 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:56:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 04:56:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2023-04-01 04:56:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-04-01 04:56:26,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2023-04-01 04:56:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:56:26,531 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-04-01 04:56:26,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-04-01 04:56:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 04:56:26,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:26,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:26,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:56:26,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:26,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1855918906, now seen corresponding path program 1 times [2023-04-01 04:56:26,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:26,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789218665] [2023-04-01 04:56:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:26,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:26,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789218665] [2023-04-01 04:56:26,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789218665] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:56:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475456925] [2023-04-01 04:56:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:26,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:26,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:56:26,805 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:56:26,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:56:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:26,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 04:56:26,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:56:27,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:27,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:27,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:56:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:27,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475456925] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:56:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681445761] [2023-04-01 04:56:27,272 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:56:27,273 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:56:27,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:56:27,282 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:56:27,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:56:27,360 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:56:28,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:56:28,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:56:29,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '386#(or (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= 1 main_~i~0.base)) (and (<= 1 main_~i~0.offset) (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.base 1) 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.offset 1) 0)))' at error location [2023-04-01 04:56:29,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:56:29,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:56:29,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-04-01 04:56:29,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798747521] [2023-04-01 04:56:29,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:56:29,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 04:56:29,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 04:56:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-04-01 04:56:29,044 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:56:29,143 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-04-01 04:56:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:56:29,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 04:56:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:56:29,146 INFO L225 Difference]: With dead ends: 38 [2023-04-01 04:56:29,146 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 04:56:29,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 04:56:29,149 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:56:29,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 99 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:56:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 04:56:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 04:56:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-04-01 04:56:29,159 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2023-04-01 04:56:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:56:29,160 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-04-01 04:56:29,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-04-01 04:56:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:56:29,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:29,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:29,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:56:29,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:29,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:29,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash 131755571, now seen corresponding path program 2 times [2023-04-01 04:56:29,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:29,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822214349] [2023-04-01 04:56:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:29,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:30,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:30,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822214349] [2023-04-01 04:56:30,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822214349] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:56:30,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239584148] [2023-04-01 04:56:30,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:56:30,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:30,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:56:30,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:56:30,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:56:30,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:56:30,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:56:30,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 04:56:30,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:56:30,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-01 04:56:30,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:56:30,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:30,500 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-04-01 04:56:30,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2023-04-01 04:56:30,525 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 04:56:30,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-04-01 04:56:30,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:30,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 42 [2023-04-01 04:56:30,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 04:56:30,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:30,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 133 [2023-04-01 04:56:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:30,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:56:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239584148] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:56:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588115791] [2023-04-01 04:56:31,232 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:56:31,232 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:56:31,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:56:31,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:56:31,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:56:31,252 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:56:31,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:56:31,828 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:56:32,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '652#(or (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= 1 main_~i~0.base)) (and (<= 1 main_~i~0.offset) (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.base 1) 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.offset 1) 0)))' at error location [2023-04-01 04:56:32,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:56:32,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:56:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-04-01 04:56:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176848806] [2023-04-01 04:56:32,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:56:32,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:56:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:56:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:56:32,359 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:56:33,005 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-04-01 04:56:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 04:56:33,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 04:56:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:56:33,006 INFO L225 Difference]: With dead ends: 52 [2023-04-01 04:56:33,006 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 04:56:33,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 04:56:33,007 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 138 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:56:33,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 172 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:56:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 04:56:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2023-04-01 04:56:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-04-01 04:56:33,015 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 25 [2023-04-01 04:56:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:56:33,015 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-04-01 04:56:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-04-01 04:56:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:56:33,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:33,016 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:33,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:56:33,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:33,223 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:33,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:33,224 INFO L85 PathProgramCache]: Analyzing trace with hash -465954482, now seen corresponding path program 3 times [2023-04-01 04:56:33,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:33,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364914828] [2023-04-01 04:56:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:33,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:33,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364914828] [2023-04-01 04:56:33,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364914828] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:56:33,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023555608] [2023-04-01 04:56:33,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:56:33,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:33,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:56:33,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:56:33,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:56:33,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:56:33,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:56:33,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-01 04:56:33,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:56:33,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:56:33,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:33,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:33,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:56:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:33,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 04:56:33,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:56:33,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:33,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-04-01 04:56:33,852 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 04:56:33,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-04-01 04:56:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:34,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:56:34,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:34,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-04-01 04:56:34,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:34,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-04-01 04:56:34,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 04:56:34,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 04:56:34,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:34,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-04-01 04:56:34,212 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:56:34,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-04-01 04:56:34,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:34,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-04-01 04:56:34,223 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:56:34,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-01 04:56:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023555608] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:56:34,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025314174] [2023-04-01 04:56:34,243 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:56:34,244 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:56:34,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:56:34,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:56:34,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:56:34,258 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:56:34,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:56:34,799 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:56:35,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '979#(or (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= 1 main_~i~0.base)) (and (<= 1 main_~i~0.offset) (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.base 1) 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.offset 1) 0)))' at error location [2023-04-01 04:56:35,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:56:35,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:56:35,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-04-01 04:56:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114184026] [2023-04-01 04:56:35,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:56:35,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:56:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:56:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:56:35,226 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:56:35,363 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-04-01 04:56:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:56:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-01 04:56:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:56:35,365 INFO L225 Difference]: With dead ends: 49 [2023-04-01 04:56:35,365 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 04:56:35,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-04-01 04:56:35,366 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:56:35,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 165 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:56:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 04:56:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-01 04:56:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-04-01 04:56:35,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 28 [2023-04-01 04:56:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:56:35,374 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-04-01 04:56:35,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-04-01 04:56:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:56:35,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:35,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:35,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:56:35,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:35,582 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:35,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:35,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1858461115, now seen corresponding path program 4 times [2023-04-01 04:56:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:35,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890430790] [2023-04-01 04:56:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:35,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:36,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:36,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890430790] [2023-04-01 04:56:36,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890430790] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:56:36,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273099298] [2023-04-01 04:56:36,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:56:36,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:36,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:56:36,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:56:36,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:56:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:37,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 77 conjunts are in the unsatisfiable core [2023-04-01 04:56:37,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:56:37,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-01 04:56:37,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:56:37,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:37,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-04-01 04:56:37,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:37,198 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 04:56:37,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 04:56:37,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:37,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:56:37,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:37,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 04:56:37,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:56:37,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:37,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2023-04-01 04:56:37,381 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-04-01 04:56:37,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 57 [2023-04-01 04:56:37,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:37,404 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-04-01 04:56:37,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-04-01 04:56:37,841 INFO L321 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-04-01 04:56:37,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 181 treesize of output 151 [2023-04-01 04:56:37,921 INFO L321 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-04-01 04:56:37,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 129 [2023-04-01 04:56:39,305 INFO L321 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-04-01 04:56:39,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 146 [2023-04-01 04:56:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:39,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:56:39,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:39,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 130 [2023-04-01 04:56:39,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:39,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 118 [2023-04-01 04:56:39,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:39,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 206 [2023-04-01 04:56:39,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 346 [2023-04-01 04:56:39,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 335 [2023-04-01 04:56:39,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:39,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 280 [2023-04-01 04:56:39,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 265 [2023-04-01 04:56:39,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 474 treesize of output 438 [2023-04-01 04:56:39,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 199 [2023-04-01 04:56:39,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 197 [2023-04-01 04:56:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:40,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273099298] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:56:40,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084870606] [2023-04-01 04:56:40,227 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:56:40,228 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:56:40,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:56:40,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:56:40,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:56:40,241 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:56:40,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:56:40,681 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:56:41,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1326#(or (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= 1 main_~i~0.base)) (and (<= 1 main_~i~0.offset) (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.base 1) 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.offset 1) 0)))' at error location [2023-04-01 04:56:41,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:56:41,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:56:41,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-04-01 04:56:41,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630076655] [2023-04-01 04:56:41,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:56:41,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 04:56:41,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:41,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 04:56:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2023-04-01 04:56:41,214 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:56:43,400 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2023-04-01 04:56:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 04:56:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-01 04:56:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:56:43,404 INFO L225 Difference]: With dead ends: 65 [2023-04-01 04:56:43,404 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 04:56:43,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=373, Invalid=1519, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 04:56:43,406 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 203 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:56:43,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 291 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:56:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 04:56:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2023-04-01 04:56:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-04-01 04:56:43,417 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 33 [2023-04-01 04:56:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:56:43,417 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-04-01 04:56:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-04-01 04:56:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 04:56:43,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:43,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:43,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:56:43,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:43,620 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:43,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:43,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1004397370, now seen corresponding path program 5 times [2023-04-01 04:56:43,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:43,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419494168] [2023-04-01 04:56:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:43,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:44,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:44,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419494168] [2023-04-01 04:56:44,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419494168] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:56:44,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754607758] [2023-04-01 04:56:44,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:56:44,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:44,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:56:44,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:56:44,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 04:56:44,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 04:56:44,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:56:44,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 81 conjunts are in the unsatisfiable core [2023-04-01 04:56:44,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:56:44,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:44,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:44,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:56:44,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:56:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:44,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 04:56:44,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:56:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:44,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-04-01 04:56:44,772 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 04:56:44,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 04:56:44,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:56:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:44,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-04-01 04:56:44,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:44,901 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-01 04:56:44,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2023-04-01 04:56:44,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:44,919 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-04-01 04:56:44,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-04-01 04:56:44,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:56:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:45,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:56:45,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:45,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2023-04-01 04:56:45,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:45,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2023-04-01 04:56:45,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:45,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 127 [2023-04-01 04:56:45,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:45,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 118 [2023-04-01 04:56:45,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:45,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 78 [2023-04-01 04:56:45,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:45,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 54 [2023-04-01 04:56:45,922 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:56:45,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-04-01 04:56:45,934 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:56:45,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 154 [2023-04-01 04:56:45,948 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-04-01 04:56:45,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 26 [2023-04-01 04:56:45,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:45,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-04-01 04:56:45,967 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:56:45,975 INFO L321 Elim1Store]: treesize reduction 32, result has 11.1 percent of original size [2023-04-01 04:56:45,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 222 [2023-04-01 04:56:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:45,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754607758] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:56:45,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374733662] [2023-04-01 04:56:46,000 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:56:46,000 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:56:46,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:56:46,000 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:56:46,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:56:46,020 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:56:46,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:56:46,505 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:56:46,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1749#(or (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= 1 main_~i~0.base)) (and (<= 1 main_~i~0.offset) (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.base 1) 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.offset 1) 0)))' at error location [2023-04-01 04:56:46,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:56:46,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:56:46,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2023-04-01 04:56:46,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262393644] [2023-04-01 04:56:46,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:56:46,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 04:56:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:46,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 04:56:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2023-04-01 04:56:46,952 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:56:47,256 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-04-01 04:56:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 04:56:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-04-01 04:56:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:56:47,256 INFO L225 Difference]: With dead ends: 60 [2023-04-01 04:56:47,257 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 04:56:47,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2023-04-01 04:56:47,258 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:56:47,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 366 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:56:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 04:56:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-01 04:56:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-04-01 04:56:47,268 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 36 [2023-04-01 04:56:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:56:47,268 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-04-01 04:56:47,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:56:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-04-01 04:56:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:56:47,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:56:47,269 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:56:47,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 04:56:47,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:47,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:56:47,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:56:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash 432874547, now seen corresponding path program 6 times [2023-04-01 04:56:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:56:47,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547266602] [2023-04-01 04:56:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:56:47,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:56:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:56:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:48,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:56:48,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547266602] [2023-04-01 04:56:48,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547266602] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:56:48,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093473121] [2023-04-01 04:56:48,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:56:48,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:56:48,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:56:48,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:56:48,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 04:56:49,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:56:49,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:56:49,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 105 conjunts are in the unsatisfiable core [2023-04-01 04:56:49,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:56:49,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:56:49,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-01 04:56:49,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:49,285 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 04:56:49,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 04:56:49,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 04:56:49,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:56:49,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:56:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2023-04-01 04:56:49,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,451 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-04-01 04:56:49,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-04-01 04:56:49,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 45 [2023-04-01 04:56:49,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-04-01 04:56:49,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:56:49,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:56:49,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-04-01 04:56:49,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:56:49,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,725 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-01 04:56:49,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 104 [2023-04-01 04:56:49,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:56:49,739 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-04-01 04:56:49,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-04-01 04:56:49,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 49 [2023-04-01 04:56:50,647 INFO L321 Elim1Store]: treesize reduction 40, result has 76.3 percent of original size [2023-04-01 04:56:50,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 305 treesize of output 257 [2023-04-01 04:56:50,780 INFO L321 Elim1Store]: treesize reduction 56, result has 66.9 percent of original size [2023-04-01 04:56:50,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 121 treesize of output 205 [2023-04-01 04:56:55,892 INFO L321 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-04-01 04:56:55,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 146 [2023-04-01 04:56:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:55,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:56:56,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:56,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 266 [2023-04-01 04:56:56,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:56,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 230 [2023-04-01 04:56:56,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:56,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 421 treesize of output 392 [2023-04-01 04:56:56,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:56,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 385 treesize of output 356 [2023-04-01 04:56:57,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:57,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 685 treesize of output 598 [2023-04-01 04:56:57,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:56:57,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 589 treesize of output 502 [2023-04-01 04:56:57,322 INFO L321 Elim1Store]: treesize reduction 183, result has 40.0 percent of original size [2023-04-01 04:56:57,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 4490 treesize of output 4367 [2023-04-01 04:56:57,478 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2023-04-01 04:56:57,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7912 treesize of output 7736 [2023-04-01 04:56:57,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 874 treesize of output 804 [2023-04-01 04:56:57,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 810 treesize of output 736 [2023-04-01 04:56:57,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 746 treesize of output 708 [2023-04-01 04:56:57,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 686 treesize of output 680 [2023-04-01 04:56:57,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 708 treesize of output 670 [2023-04-01 04:56:57,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 622 treesize of output 616 [2023-04-01 04:56:57,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 644 treesize of output 638 [2023-04-01 04:56:57,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 616 treesize of output 610 [2023-04-01 04:56:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:56:58,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093473121] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:56:58,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133984935] [2023-04-01 04:56:58,670 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:56:58,670 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:56:58,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:56:58,670 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:56:58,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:56:58,696 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:56:59,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:56:59,103 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:56:59,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2176#(or (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= 1 main_~i~0.base)) (and (<= 1 main_~i~0.offset) (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.base 1) 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.offset 1) 0)))' at error location [2023-04-01 04:56:59,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:56:59,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:56:59,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-04-01 04:56:59,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717546109] [2023-04-01 04:56:59,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:56:59,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 04:56:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:56:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 04:56:59,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=846, Unknown=2, NotChecked=0, Total=930 [2023-04-01 04:56:59,593 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:01,835 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2023-04-01 04:57:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 04:57:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 04:57:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:01,836 INFO L225 Difference]: With dead ends: 50 [2023-04-01 04:57:01,836 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 04:57:01,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=296, Invalid=1424, Unknown=2, NotChecked=0, Total=1722 [2023-04-01 04:57:01,837 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 93 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:01,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 421 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:57:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 04:57:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-04-01 04:57:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-04-01 04:57:01,851 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 41 [2023-04-01 04:57:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:01,851 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-04-01 04:57:01,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-04-01 04:57:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 04:57:01,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:01,852 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:01,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 04:57:02,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:02,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:02,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2017221810, now seen corresponding path program 7 times [2023-04-01 04:57:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:02,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049923634] [2023-04-01 04:57:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:03,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:03,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049923634] [2023-04-01 04:57:03,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049923634] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:03,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741178123] [2023-04-01 04:57:03,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:57:03,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:03,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:03,348 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:57:03,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 04:57:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:03,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 108 conjunts are in the unsatisfiable core [2023-04-01 04:57:03,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:03,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:57:03,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:57:03,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:57:03,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:57:03,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-04-01 04:57:03,635 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 04:57:03,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 04:57:03,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-04-01 04:57:03,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:57:03,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:57:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-04-01 04:57:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,746 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-01 04:57:03,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2023-04-01 04:57:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,772 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-04-01 04:57:03,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-04-01 04:57:03,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:57:03,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:57:03,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,927 INFO L321 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2023-04-01 04:57:03,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 86 [2023-04-01 04:57:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,941 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-04-01 04:57:03,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-04-01 04:57:03,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:03,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 63 [2023-04-01 04:57:03,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:57:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:04,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:04,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:04,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 133 [2023-04-01 04:57:04,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:04,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 112 [2023-04-01 04:57:04,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:04,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 219 [2023-04-01 04:57:04,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:04,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 198 [2023-04-01 04:57:04,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:04,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 363 treesize of output 349 [2023-04-01 04:57:05,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:05,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 328 [2023-04-01 04:57:05,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:05,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 189 [2023-04-01 04:57:05,506 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,507 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,525 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-04-01 04:57:05,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2764 treesize of output 2684 [2023-04-01 04:57:05,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:05,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1264 treesize of output 818 [2023-04-01 04:57:05,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,553 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,554 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5652 treesize of output 5454 [2023-04-01 04:57:05,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 702 treesize of output 620 [2023-04-01 04:57:05,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 620 treesize of output 502 [2023-04-01 04:57:05,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 493 treesize of output 433 [2023-04-01 04:57:05,682 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-01 04:57:05,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-04-01 04:57:05,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:05,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 177 [2023-04-01 04:57:05,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:05,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:05,748 INFO L321 Elim1Store]: treesize reduction 765, result has 3.2 percent of original size [2023-04-01 04:57:05,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 19534 treesize of output 17852 [2023-04-01 04:57:05,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:57:05,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2855 treesize of output 1857 [2023-04-01 04:57:05,859 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,859 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,860 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 142 [2023-04-01 04:57:05,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 160 [2023-04-01 04:57:05,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2023-04-01 04:57:05,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 118 [2023-04-01 04:57:05,877 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,879 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:57:05,886 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-01 04:57:05,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2023-04-01 04:57:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:05,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741178123] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:05,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [765942366] [2023-04-01 04:57:05,904 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:57:05,904 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:05,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:05,904 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:05,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:05,917 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:57:06,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:57:06,330 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:06,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2629#(or (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= 1 main_~i~0.base)) (and (<= 1 main_~i~0.offset) (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.base 1) 0)) (and (<= (+ 1 main_~l~0.base) |#StackHeapBarrier|) (= main_~l~0.offset 0) (<= (+ main_~i~0.offset 1) 0)))' at error location [2023-04-01 04:57:06,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:06,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:06,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-04-01 04:57:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925912014] [2023-04-01 04:57:06,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:06,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 04:57:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 04:57:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2023-04-01 04:57:06,864 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:07,492 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2023-04-01 04:57:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:57:07,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-04-01 04:57:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:07,493 INFO L225 Difference]: With dead ends: 71 [2023-04-01 04:57:07,493 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 04:57:07,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 04:57:07,498 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 31 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:07,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 622 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 04:57:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 04:57:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-04-01 04:57:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-04-01 04:57:07,513 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 44 [2023-04-01 04:57:07,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:07,513 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-04-01 04:57:07,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-04-01 04:57:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 04:57:07,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:07,514 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:07,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 04:57:07,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:07,715 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:07,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash 43707835, now seen corresponding path program 8 times [2023-04-01 04:57:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:07,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588822325] [2023-04-01 04:57:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:07,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 23 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:09,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588822325] [2023-04-01 04:57:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588822325] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729107997] [2023-04-01 04:57:09,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:57:09,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:09,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:09,870 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:57:09,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 04:57:11,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 04:57:11,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:57:11,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 143 conjunts are in the unsatisfiable core [2023-04-01 04:57:11,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:11,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-01 04:57:11,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:57:11,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:57:11,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:57:11,145 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 04:57:11,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 04:57:11,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 04:57:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2023-04-01 04:57:11,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:57:11,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 04:57:11,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2023-04-01 04:57:11,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,320 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-04-01 04:57:11,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-04-01 04:57:11,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:57:11,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:57:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-04-01 04:57:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,518 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-01 04:57:11,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 104 [2023-04-01 04:57:11,535 INFO L321 Elim1Store]: treesize reduction 35, result has 48.5 percent of original size [2023-04-01 04:57:11,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 65 [2023-04-01 04:57:11,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,575 INFO L321 Elim1Store]: treesize reduction 54, result has 38.6 percent of original size [2023-04-01 04:57:11,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 73 [2023-04-01 04:57:11,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:57:11,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:57:11,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,841 INFO L321 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2023-04-01 04:57:11,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 244 treesize of output 138 [2023-04-01 04:57:11,854 INFO L321 Elim1Store]: treesize reduction 43, result has 48.8 percent of original size [2023-04-01 04:57:11,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 73 [2023-04-01 04:57:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,878 INFO L321 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2023-04-01 04:57:11,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 36 [2023-04-01 04:57:11,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:57:11,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 63 [2023-04-01 04:57:11,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7