/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 EqDomain -i ../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:51:03,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:51:03,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:51:03,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:51:03,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:51:03,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:51:03,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:51:03,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:51:03,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:51:03,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:51:03,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:51:03,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:51:03,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:51:03,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:51:03,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:51:03,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:51:03,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:51:03,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:51:03,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:51:03,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:51:03,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:51:03,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:51:03,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:51:03,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:51:03,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:51:03,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:51:03,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:51:03,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:51:03,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:51:03,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:51:03,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:51:03,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:51:03,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:51:03,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:51:03,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:51:03,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:51:03,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:51:03,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:51:03,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:51:03,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:51:03,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:51:03,255 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 10:51:03,278 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:51:03,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:51:03,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:51:03,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:51:03,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:51:03,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:51:03,280 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:51:03,280 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:51:03,280 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:51:03,280 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:51:03,281 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:51:03,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:51:03,281 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:51:03,281 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:51:03,281 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:51:03,281 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:51:03,281 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:51:03,281 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:51:03,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:51:03,282 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:51:03,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:51:03,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:51:03,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:51:03,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:51:03,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:51:03,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:51:03,283 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:51:03,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:51:03,283 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:51:03,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:51:03,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:51:03,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:51:03,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:51:03,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:51:03,284 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:51:03,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:51:03,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:51:03,284 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:51:03,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:51:03,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:51:03,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:51:03,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:51:03,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:51:03,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:51:03,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:51:03,517 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:51:03,517 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:51:03,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-04-01 10:51:04,600 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:51:04,843 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:51:04,843 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-04-01 10:51:04,858 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e285356dd/5062760f72b7440dba1fefe5f09ea233/FLAGa557eebcc [2023-04-01 10:51:04,869 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e285356dd/5062760f72b7440dba1fefe5f09ea233 [2023-04-01 10:51:04,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:51:04,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:51:04,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:51:04,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:51:04,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:51:04,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66cff5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04, skipping insertion in model container [2023-04-01 10:51:04,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:51:04,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:51:05,079 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-manipulation/merge_sort-2.i[22632,22645] [2023-04-01 10:51:05,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:51:05,117 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:51:05,159 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-manipulation/merge_sort-2.i[22632,22645] [2023-04-01 10:51:05,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:51:05,198 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:51:05,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05 WrapperNode [2023-04-01 10:51:05,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:51:05,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:51:05,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:51:05,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:51:05,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,282 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:51:05,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:51:05,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:51:05,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:51:05,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (1/1) ... [2023-04-01 10:51:05,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:51:05,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:51:05,318 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 10:51:05,335 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 10:51:05,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:51:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:51:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:51:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:51:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:51:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-04-01 10:51:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-04-01 10:51:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2023-04-01 10:51:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2023-04-01 10:51:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2023-04-01 10:51:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2023-04-01 10:51:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:51:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:51:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:51:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:51:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:51:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:51:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:51:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:51:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:51:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:51:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:51:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:51:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:51:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:51:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:51:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:51:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:51:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:51:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:51:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:51:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:51:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:51:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:51:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:51:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:51:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:51:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:51:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:51:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:51:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:51:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:51:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:51:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:51:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:51:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:51:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:51:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:51:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:51:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:51:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:51:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:51:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:51:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:51:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:51:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:51:05,365 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-04-01 10:51:05,365 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-04-01 10:51:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:51:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:51:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2023-04-01 10:51:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 10:51:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:51:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:51:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2023-04-01 10:51:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2023-04-01 10:51:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2023-04-01 10:51:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:51:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:51:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:51:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:51:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:51:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:51:05,647 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:51:05,649 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:51:05,930 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:51:05,985 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:51:05,985 INFO L302 CfgBuilder]: Removed 33 assume(true) statements. [2023-04-01 10:51:05,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:51:05 BoogieIcfgContainer [2023-04-01 10:51:05,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:51:05,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:51:05,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:51:05,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:51:05,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:51:04" (1/3) ... [2023-04-01 10:51:05,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc3518f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:51:05, skipping insertion in model container [2023-04-01 10:51:05,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:05" (2/3) ... [2023-04-01 10:51:05,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc3518f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:51:05, skipping insertion in model container [2023-04-01 10:51:05,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:51:05" (3/3) ... [2023-04-01 10:51:05,993 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2023-04-01 10:51:06,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:51:06,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:51:06,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:51:06,077 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;@296cf1dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:51:06,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:51:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 86 states have internal predecessors, (124), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 10:51:06,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 10:51:06,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:06,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1195293700, now seen corresponding path program 1 times [2023-04-01 10:51:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455287452] [2023-04-01 10:51:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:06,223 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 10:51:06,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455287452] [2023-04-01 10:51:06,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455287452] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:06,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:06,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 10:51:06,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376071475] [2023-04-01 10:51:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:06,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 10:51:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:06,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 10:51:06,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 10:51:06,261 INFO L87 Difference]: Start difference. First operand has 100 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 86 states have internal predecessors, (124), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:06,328 INFO L93 Difference]: Finished difference Result 192 states and 327 transitions. [2023-04-01 10:51:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 10:51:06,330 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 10:51:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:06,339 INFO L225 Difference]: With dead ends: 192 [2023-04-01 10:51:06,339 INFO L226 Difference]: Without dead ends: 90 [2023-04-01 10:51:06,344 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 10:51:06,347 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:06,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:51:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-01 10:51:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-04-01 10:51:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 78 states have internal predecessors, (83), 21 states have call successors, (21), 8 states have call predecessors, (21), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2023-04-01 10:51:06,390 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 12 [2023-04-01 10:51:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:06,391 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2023-04-01 10:51:06,391 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2023-04-01 10:51:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 10:51:06,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:06,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:51:06,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1762023615, now seen corresponding path program 1 times [2023-04-01 10:51:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245280510] [2023-04-01 10:51:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:06,494 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 10:51:06,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:06,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245280510] [2023-04-01 10:51:06,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245280510] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:06,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:06,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:51:06,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479480968] [2023-04-01 10:51:06,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:06,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:51:06,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:51:06,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:51:06,497 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:06,567 INFO L93 Difference]: Finished difference Result 175 states and 215 transitions. [2023-04-01 10:51:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:51:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 10:51:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:06,570 INFO L225 Difference]: With dead ends: 175 [2023-04-01 10:51:06,571 INFO L226 Difference]: Without dead ends: 92 [2023-04-01 10:51:06,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:51:06,579 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:06,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:51:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-04-01 10:51:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-04-01 10:51:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 80 states have internal predecessors, (85), 21 states have call successors, (21), 8 states have call predecessors, (21), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-04-01 10:51:06,592 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 13 [2023-04-01 10:51:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:06,593 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-04-01 10:51:06,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-04-01 10:51:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 10:51:06,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,593 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:06,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:51:06,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,594 INFO L85 PathProgramCache]: Analyzing trace with hash 598701301, now seen corresponding path program 1 times [2023-04-01 10:51:06,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495452763] [2023-04-01 10:51:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:06,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:06,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495452763] [2023-04-01 10:51:06,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495452763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:06,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:06,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:51:06,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417738748] [2023-04-01 10:51:06,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:06,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:51:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:51:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:51:06,730 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:06,862 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2023-04-01 10:51:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:51:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 10:51:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:06,865 INFO L225 Difference]: With dead ends: 134 [2023-04-01 10:51:06,865 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 10:51:06,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:06,871 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 108 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:06,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 298 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 10:51:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2023-04-01 10:51:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.289855072463768) internal successors, (89), 83 states have internal predecessors, (89), 20 states have call successors, (20), 8 states have call predecessors, (20), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:06,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2023-04-01 10:51:06,887 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 15 [2023-04-01 10:51:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:06,887 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2023-04-01 10:51:06,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2023-04-01 10:51:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 10:51:06,888 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,888 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:06,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:51:06,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1491454638, now seen corresponding path program 1 times [2023-04-01 10:51:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675023196] [2023-04-01 10:51:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:51:07,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:07,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675023196] [2023-04-01 10:51:07,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675023196] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:07,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:07,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:51:07,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416145415] [2023-04-01 10:51:07,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:51:07,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:51:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:51:07,047 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:07,192 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2023-04-01 10:51:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:51:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 10:51:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:07,193 INFO L225 Difference]: With dead ends: 97 [2023-04-01 10:51:07,193 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 10:51:07,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:07,194 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 12 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:07,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 300 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 10:51:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-01 10:51:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 82 states have internal predecessors, (88), 19 states have call successors, (19), 8 states have call predecessors, (19), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2023-04-01 10:51:07,204 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 22 [2023-04-01 10:51:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:07,204 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2023-04-01 10:51:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2023-04-01 10:51:07,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 10:51:07,205 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:07,205 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:07,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:51:07,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:07,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1816870628, now seen corresponding path program 1 times [2023-04-01 10:51:07,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:07,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409057760] [2023-04-01 10:51:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:07,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:51:07,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409057760] [2023-04-01 10:51:07,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409057760] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:07,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:07,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:51:07,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310963517] [2023-04-01 10:51:07,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:07,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:51:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:51:07,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:51:07,286 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:07,392 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2023-04-01 10:51:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:51:07,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 10:51:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:07,393 INFO L225 Difference]: With dead ends: 96 [2023-04-01 10:51:07,393 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 10:51:07,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:07,394 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 13 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:07,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 291 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:07,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 10:51:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-04-01 10:51:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 81 states have internal predecessors, (87), 18 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2023-04-01 10:51:07,401 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 22 [2023-04-01 10:51:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:07,401 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2023-04-01 10:51:07,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2023-04-01 10:51:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:51:07,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:07,402 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:07,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:51:07,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:07,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:07,402 INFO L85 PathProgramCache]: Analyzing trace with hash 251895696, now seen corresponding path program 1 times [2023-04-01 10:51:07,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:07,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806754531] [2023-04-01 10:51:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:07,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:07,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806754531] [2023-04-01 10:51:07,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806754531] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:07,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:07,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 10:51:07,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137767035] [2023-04-01 10:51:07,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:07,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:51:07,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:07,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:51:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:07,565 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:07,721 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2023-04-01 10:51:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:51:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 10:51:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:07,722 INFO L225 Difference]: With dead ends: 126 [2023-04-01 10:51:07,722 INFO L226 Difference]: Without dead ends: 123 [2023-04-01 10:51:07,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:51:07,723 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 91 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:07,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-01 10:51:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2023-04-01 10:51:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.24) internal successors, (93), 87 states have internal predecessors, (93), 18 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-04-01 10:51:07,730 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 25 [2023-04-01 10:51:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:07,730 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-04-01 10:51:07,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-04-01 10:51:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:51:07,731 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:07,731 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:07,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:51:07,731 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:07,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1038832177, now seen corresponding path program 1 times [2023-04-01 10:51:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135390770] [2023-04-01 10:51:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:07,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:07,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135390770] [2023-04-01 10:51:07,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135390770] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:07,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:07,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 10:51:07,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566261816] [2023-04-01 10:51:07,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:51:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:51:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:07,833 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:07,989 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2023-04-01 10:51:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:51:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 10:51:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:07,990 INFO L225 Difference]: With dead ends: 125 [2023-04-01 10:51:07,990 INFO L226 Difference]: Without dead ends: 122 [2023-04-01 10:51:07,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:51:07,991 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 89 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:07,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-01 10:51:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2023-04-01 10:51:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 93 states have internal predecessors, (99), 18 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-04-01 10:51:07,999 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 25 [2023-04-01 10:51:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:07,999 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-04-01 10:51:07,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-04-01 10:51:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:51:08,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:08,000 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 10:51:08,000 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:08,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 694641243, now seen corresponding path program 1 times [2023-04-01 10:51:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704081761] [2023-04-01 10:51:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:08,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704081761] [2023-04-01 10:51:08,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704081761] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:08,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:08,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 10:51:08,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157145781] [2023-04-01 10:51:08,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:08,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:51:08,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:08,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:51:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:08,257 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:08,437 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2023-04-01 10:51:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:51:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-01 10:51:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:08,439 INFO L225 Difference]: With dead ends: 124 [2023-04-01 10:51:08,439 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 10:51:08,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:51:08,440 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 84 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:08,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 10:51:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2023-04-01 10:51:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 96 states have internal predecessors, (102), 18 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2023-04-01 10:51:08,462 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 28 [2023-04-01 10:51:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:08,464 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2023-04-01 10:51:08,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2023-04-01 10:51:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:51:08,468 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:08,468 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 10:51:08,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:08,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1846756687, now seen corresponding path program 1 times [2023-04-01 10:51:08,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:08,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747863698] [2023-04-01 10:51:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:08,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:08,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:08,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747863698] [2023-04-01 10:51:08,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747863698] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:08,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:08,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 10:51:08,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844061785] [2023-04-01 10:51:08,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:08,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:51:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:51:08,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:08,700 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:08,868 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2023-04-01 10:51:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:51:08,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-01 10:51:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:08,870 INFO L225 Difference]: With dead ends: 123 [2023-04-01 10:51:08,870 INFO L226 Difference]: Without dead ends: 120 [2023-04-01 10:51:08,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:51:08,872 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 82 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:08,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-01 10:51:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2023-04-01 10:51:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.206896551724138) internal successors, (105), 99 states have internal predecessors, (105), 18 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2023-04-01 10:51:08,881 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 28 [2023-04-01 10:51:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:08,881 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2023-04-01 10:51:08,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2023-04-01 10:51:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:51:08,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:08,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:08,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 10:51:08,882 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:08,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -299663970, now seen corresponding path program 1 times [2023-04-01 10:51:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:08,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207774416] [2023-04-01 10:51:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:08,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:51:08,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:08,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207774416] [2023-04-01 10:51:08,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207774416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:51:08,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617182244] [2023-04-01 10:51:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:08,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:51:08,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:51:08,948 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 10:51:09,010 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 10:51:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:09,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 10:51:09,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:51:09,221 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 31 treesize of output 19 [2023-04-01 10:51:09,248 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 25 treesize of output 13 [2023-04-01 10:51:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:51:09,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:51:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:51:09,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617182244] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:51:09,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117074567] [2023-04-01 10:51:09,400 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:51:09,400 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:51:09,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:51:09,406 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:51:09,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:51:09,486 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:51:09,747 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 46 for LOIs [2023-04-01 10:51:12,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:51:12,040 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 9 for LOIs [2023-04-01 10:51:12,041 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:51:13,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3513#(and (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:51:13,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:51:13,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:51:13,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-04-01 10:51:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733490839] [2023-04-01 10:51:13,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:51:13,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:51:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:13,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:51:13,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=576, Unknown=11, NotChecked=0, Total=702 [2023-04-01 10:51:13,131 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:13,248 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2023-04-01 10:51:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:51:13,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-01 10:51:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:13,249 INFO L225 Difference]: With dead ends: 113 [2023-04-01 10:51:13,249 INFO L226 Difference]: Without dead ends: 109 [2023-04-01 10:51:13,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=673, Unknown=11, NotChecked=0, Total=812 [2023-04-01 10:51:13,250 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 31 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:13,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 255 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-01 10:51:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-01 10:51:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 97 states have internal predecessors, (103), 16 states have call successors, (16), 8 states have call predecessors, (16), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2023-04-01 10:51:13,257 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 33 [2023-04-01 10:51:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:13,258 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2023-04-01 10:51:13,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:13,258 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2023-04-01 10:51:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 10:51:13,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:13,258 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:13,269 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 10:51:13,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 10:51:13,459 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:13,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1638158787, now seen corresponding path program 1 times [2023-04-01 10:51:13,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:13,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995079665] [2023-04-01 10:51:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:13,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:13,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995079665] [2023-04-01 10:51:13,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995079665] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:13,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:13,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:51:13,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037168919] [2023-04-01 10:51:13,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:13,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:51:13,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:13,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:51:13,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:51:13,575 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:51:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:13,660 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2023-04-01 10:51:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:51:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-04-01 10:51:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:13,665 INFO L225 Difference]: With dead ends: 134 [2023-04-01 10:51:13,665 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 10:51:13,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:13,666 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 34 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:13,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 329 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 10:51:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2023-04-01 10:51:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 100 states have internal predecessors, (108), 17 states have call successors, (17), 9 states have call predecessors, (17), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2023-04-01 10:51:13,699 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 36 [2023-04-01 10:51:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:13,699 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2023-04-01 10:51:13,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:51:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2023-04-01 10:51:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 10:51:13,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:13,725 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:13,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 10:51:13,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:13,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1193814081, now seen corresponding path program 1 times [2023-04-01 10:51:13,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:13,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135491619] [2023-04-01 10:51:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:13,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:13,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:13,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135491619] [2023-04-01 10:51:13,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135491619] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:51:13,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934374659] [2023-04-01 10:51:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:13,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:51:13,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:51:13,937 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 10:51:13,983 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 10:51:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:14,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 10:51:14,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:51:14,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:51:14,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:51:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:14,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:51:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:14,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934374659] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:51:14,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254241333] [2023-04-01 10:51:14,328 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-01 10:51:14,328 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:51:14,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:51:14,329 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:51:14,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:51:14,381 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:51:14,618 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_after with input of size 63 for LOIs [2023-04-01 10:51:14,647 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 46 for LOIs [2023-04-01 10:51:14,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:51:14,739 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:51:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1254241333] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:16,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:51:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [7, 8, 7] total 32 [2023-04-01 10:51:16,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693136989] [2023-04-01 10:51:16,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:16,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 10:51:16,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 10:51:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2023-04-01 10:51:16,282 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:51:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:19,757 INFO L93 Difference]: Finished difference Result 222 states and 266 transitions. [2023-04-01 10:51:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 10:51:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-04-01 10:51:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:19,759 INFO L225 Difference]: With dead ends: 222 [2023-04-01 10:51:19,759 INFO L226 Difference]: Without dead ends: 180 [2023-04-01 10:51:19,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 10:51:19,760 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 605 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:19,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 10 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 10:51:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-04-01 10:51:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 125. [2023-04-01 10:51:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 100 states have (on average 1.17) internal successors, (117), 109 states have internal predecessors, (117), 18 states have call successors, (18), 10 states have call predecessors, (18), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 10:51:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2023-04-01 10:51:19,785 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 39 [2023-04-01 10:51:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:19,786 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2023-04-01 10:51:19,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:51:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2023-04-01 10:51:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 10:51:19,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:19,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:19,794 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 10:51:19,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 10:51:19,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:19,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash 309961835, now seen corresponding path program 1 times [2023-04-01 10:51:19,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:19,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027298527] [2023-04-01 10:51:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:19,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 10:51:20,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027298527] [2023-04-01 10:51:20,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027298527] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:51:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202332563] [2023-04-01 10:51:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:20,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:51:20,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:51:20,273 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 10:51:20,276 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 10:51:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:20,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 10:51:20,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:51:20,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:51:20,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:51:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 10:51:20,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:51:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 10:51:20,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202332563] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:51:20,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227493537] [2023-04-01 10:51:20,548 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:51:20,548 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:51:20,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:51:20,549 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:51:20,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:51:20,567 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:51:20,661 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 46 for LOIs [2023-04-01 10:51:22,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:51:22,409 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 55 for LOIs [2023-04-01 10:51:22,414 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:51:25,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5314#(exists ((v_inspect_before_~shape.offset_BEFORE_CALL_2 Int) (v_inspect_before_~shape.base_BEFORE_CALL_2 Int) (|v_inspect_before_#in~shape.base_BEFORE_CALL_2| Int) (|v_inspect_before_#in~shape.offset_BEFORE_CALL_2| Int)) (and (or (not (= (select (select |#memory_$Pointer$.offset| v_inspect_before_~shape.base_BEFORE_CALL_2) (+ 4 v_inspect_before_~shape.offset_BEFORE_CALL_2)) 0)) (not (= (select (select |#memory_$Pointer$.base| v_inspect_before_~shape.base_BEFORE_CALL_2) (+ 4 v_inspect_before_~shape.offset_BEFORE_CALL_2)) 0))) (= (select (select |#memory_$Pointer$.offset| v_inspect_before_~shape.base_BEFORE_CALL_2) v_inspect_before_~shape.offset_BEFORE_CALL_2) 0) (= (select (select |#memory_$Pointer$.base| v_inspect_before_~shape.base_BEFORE_CALL_2) v_inspect_before_~shape.offset_BEFORE_CALL_2) 0) (or (not (= v_inspect_before_~shape.offset_BEFORE_CALL_2 0)) (not (= v_inspect_before_~shape.base_BEFORE_CALL_2 0))) (or (and (not (= |v_inspect_before_#in~shape.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (= v_inspect_before_~shape.offset_BEFORE_CALL_2 0) (not (= |#StackHeapBarrier| 0)) (= |v_inspect_before_#in~shape.base_BEFORE_CALL_2| v_inspect_before_~shape.base_BEFORE_CALL_2) (= |#NULL.offset| 0) (= |v_inspect_before_#in~shape.offset_BEFORE_CALL_2| 0) (not (= |v_inspect_before_#in~shape.base_BEFORE_CALL_2| 0)) (= |#NULL.base| 0)) (and (not (= |v_inspect_before_#in~shape.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_inspect_before_#in~shape.base_BEFORE_CALL_2|) 0)) (select (select |#memory_$Pointer$.offset| |v_inspect_before_#in~shape.base_BEFORE_CALL_2|) 0)) 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_inspect_before_#in~shape.base_BEFORE_CALL_2|) 0)) (select (select |#memory_$Pointer$.offset| |v_inspect_before_#in~shape.base_BEFORE_CALL_2|) 0)) 0) (= |v_inspect_before_#in~shape.offset_BEFORE_CALL_2| 0) (not (= |v_inspect_before_#in~shape.base_BEFORE_CALL_2| 0)) (= |#NULL.base| 0)))))' at error location [2023-04-01 10:51:25,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:51:25,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:51:25,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 10:51:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834300306] [2023-04-01 10:51:25,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:51:25,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 10:51:25,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 10:51:25,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=882, Unknown=12, NotChecked=0, Total=992 [2023-04-01 10:51:25,682 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:25,973 INFO L93 Difference]: Finished difference Result 238 states and 272 transitions. [2023-04-01 10:51:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:51:25,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-04-01 10:51:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:25,975 INFO L225 Difference]: With dead ends: 238 [2023-04-01 10:51:25,975 INFO L226 Difference]: Without dead ends: 150 [2023-04-01 10:51:25,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=113, Invalid=997, Unknown=12, NotChecked=0, Total=1122 [2023-04-01 10:51:25,976 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 37 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:25,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 621 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 10:51:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-01 10:51:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2023-04-01 10:51:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 120 states have (on average 1.15) internal successors, (138), 130 states have internal predecessors, (138), 19 states have call successors, (19), 11 states have call predecessors, (19), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 10:51:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2023-04-01 10:51:26,002 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 39 [2023-04-01 10:51:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:26,003 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2023-04-01 10:51:26,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2023-04-01 10:51:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:51:26,003 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:26,003 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:26,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 10:51:26,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:51:26,209 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:26,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1825662294, now seen corresponding path program 1 times [2023-04-01 10:51:26,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:26,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966802886] [2023-04-01 10:51:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:26,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:26,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966802886] [2023-04-01 10:51:26,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966802886] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:26,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:26,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 10:51:26,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322243446] [2023-04-01 10:51:26,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:26,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 10:51:26,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:26,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 10:51:26,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:51:26,346 INFO L87 Difference]: Start difference. First operand 147 states and 165 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:51:26,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:26,537 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2023-04-01 10:51:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:51:26,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-04-01 10:51:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:26,539 INFO L225 Difference]: With dead ends: 167 [2023-04-01 10:51:26,539 INFO L226 Difference]: Without dead ends: 164 [2023-04-01 10:51:26,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:51:26,540 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:26,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 378 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 10:51:26,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-04-01 10:51:26,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2023-04-01 10:51:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 126 states have (on average 1.1507936507936507) internal successors, (145), 136 states have internal predecessors, (145), 19 states have call successors, (19), 11 states have call predecessors, (19), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 10:51:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 172 transitions. [2023-04-01 10:51:26,565 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 172 transitions. Word has length 42 [2023-04-01 10:51:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:26,565 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 172 transitions. [2023-04-01 10:51:26,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:51:26,566 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 172 transitions. [2023-04-01 10:51:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 10:51:26,566 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:26,566 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:26,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 10:51:26,567 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:26,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:26,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1369900769, now seen corresponding path program 2 times [2023-04-01 10:51:26,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:26,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838354573] [2023-04-01 10:51:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:26,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:27,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838354573] [2023-04-01 10:51:27,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838354573] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:51:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114254689] [2023-04-01 10:51:27,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 10:51:27,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:51:27,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:51:27,039 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 10:51:27,041 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 10:51:27,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 10:51:27,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:51:27,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 75 conjunts are in the unsatisfiable core [2023-04-01 10:51:27,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:51:27,209 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 10:51:27,209 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-04-01 10:51:27,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:51:27,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:51:27,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:51:27,293 INFO L321 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2023-04-01 10:51:27,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 102 [2023-04-01 10:51:27,309 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:51:27,309 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 11 treesize of output 11 [2023-04-01 10:51:27,358 INFO L321 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2023-04-01 10:51:27,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 102 [2023-04-01 10:51:27,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 15 [2023-04-01 10:51:27,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-04-01 10:51:27,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-04-01 10:51:27,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-04-01 10:51:27,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 18 [2023-04-01 10:51:27,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 18 [2023-04-01 10:51:27,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:51:27,626 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2023-04-01 10:51:27,643 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:51:27,645 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 60 [2023-04-01 10:51:27,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 10:51:30,552 INFO L321 Elim1Store]: treesize reduction 48, result has 90.8 percent of original size [2023-04-01 10:51:30,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 520 treesize of output 948 [2023-04-01 10:51:32,022 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 5 treesize of output 3 [2023-04-01 10:51:47,444 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 5 treesize of output 3 [2023-04-01 10:51:52,210 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 5 treesize of output 3 [2023-04-01 10:51:57,905 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 5 treesize of output 3 [2023-04-01 10:52:00,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 222 treesize of output 216 [2023-04-01 10:52:02,506 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 5 treesize of output 3 [2023-04-01 10:52:03,700 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 5 treesize of output 3 [2023-04-01 10:52:05,416 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 5 treesize of output 3