/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:52:19,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:52:19,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:52:19,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:52:19,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:52:19,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:52:19,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:52:19,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:52:19,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:52:19,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:52:19,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:52:19,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:52:19,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:52:19,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:52:19,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:52:19,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:52:19,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:52:19,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:52:19,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:52:19,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:52:19,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:52:19,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:52:19,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:52:19,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:52:19,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:52:19,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:52:19,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:52:19,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:52:19,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:52:19,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:52:19,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:52:19,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:52:19,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:52:19,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:52:19,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:52:19,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:52:19,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:52:19,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:52:19,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:52:19,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:52:19,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:52:19,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:52:19,158 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:52:19,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:52:19,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:52:19,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:52:19,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:52:19,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:52:19,160 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:52:19,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:52:19,160 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:52:19,160 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:52:19,161 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:52:19,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:52:19,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:52:19,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:52:19,161 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:52:19,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:52:19,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:52:19,161 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:52:19,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:52:19,162 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:52:19,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:52:19,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:52:19,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:52:19,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:52:19,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:52:19,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:52:19,163 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:52:19,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:52:19,163 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:52:19,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:52:19,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:52:19,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:52:19,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:52:19,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:52:19,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:52:19,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:52:19,400 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:52:19,400 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:52:19,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2023-04-01 04:52:20,677 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:52:20,950 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:52:20,951 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2023-04-01 04:52:20,957 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75aceb06/6a7d482d41ff4ea989d79ef429b0c86a/FLAGe8198e5d3 [2023-04-01 04:52:20,966 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75aceb06/6a7d482d41ff4ea989d79ef429b0c86a [2023-04-01 04:52:20,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:52:20,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:52:20,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:52:20,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:52:20,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:52:20,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:52:20" (1/1) ... [2023-04-01 04:52:20,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188b2c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:20, skipping insertion in model container [2023-04-01 04:52:20,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:52:20" (1/1) ... [2023-04-01 04:52:20,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:52:20,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:52:21,148 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/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2023-04-01 04:52:21,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:52:21,157 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:52:21,180 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/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2023-04-01 04:52:21,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:52:21,197 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:52:21,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21 WrapperNode [2023-04-01 04:52:21,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:52:21,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:52:21,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:52:21,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:52:21,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,236 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:52:21,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:52:21,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:52:21,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:52:21,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (1/1) ... [2023-04-01 04:52:21,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:52:21,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:52:21,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:52:21,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:52:21,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:52:21,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:52:21,342 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:52:21,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:52:21,344 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:52:21,344 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:52:21,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:52:21,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:52:21,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:52:21,346 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:52:21,346 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:52:21,346 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:52:21,346 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:52:21,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:52:21,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:52:21,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:52:21,347 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:52:21,347 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:52:21,347 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:52:21,348 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:52:21,349 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:52:21,349 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:52:21,349 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:52:21,349 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:52:21,350 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:52:21,350 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:52:21,350 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:52:21,350 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:52:21,350 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:52:21,350 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:52:21,351 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:52:21,351 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:52:21,351 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:52:21,352 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:52:21,352 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:52:21,352 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:52:21,352 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:52:21,352 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:52:21,352 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:52:21,352 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:52:21,353 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:52:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:52:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:52:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:52:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:52:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:52:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:52:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:52:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:52:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:52:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:52:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:52:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:52:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:52:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:52:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:52:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:52:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:52:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:52:21,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:52:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:52:21,633 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:52:21,635 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:52:21,798 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:52:21,811 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:52:21,811 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-01 04:52:21,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:52:21 BoogieIcfgContainer [2023-04-01 04:52:21,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:52:21,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:52:21,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:52:21,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:52:21,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:52:20" (1/3) ... [2023-04-01 04:52:21,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3832958f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:52:21, skipping insertion in model container [2023-04-01 04:52:21,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:52:21" (2/3) ... [2023-04-01 04:52:21,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3832958f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:52:21, skipping insertion in model container [2023-04-01 04:52:21,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:52:21" (3/3) ... [2023-04-01 04:52:21,818 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2023-04-01 04:52:21,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:52:21,830 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:52:21,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:52:21,862 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;@3c1e097e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:52:21,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:52:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:52:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 04:52:21,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:21,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:21,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:21,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:21,873 INFO L85 PathProgramCache]: Analyzing trace with hash 968364081, now seen corresponding path program 1 times [2023-04-01 04:52:21,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:21,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046766614] [2023-04-01 04:52:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:21,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:21,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046766614] [2023-04-01 04:52:21,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046766614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:52:21,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:52:21,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:52:22,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347665534] [2023-04-01 04:52:22,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:52:22,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:52:22,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:52:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:52:22,033 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:22,062 INFO L93 Difference]: Finished difference Result 46 states and 67 transitions. [2023-04-01 04:52:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:52:22,064 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 04:52:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:22,071 INFO L225 Difference]: With dead ends: 46 [2023-04-01 04:52:22,071 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 04:52:22,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:52:22,077 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:22,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:52:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 04:52:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 04:52:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-04-01 04:52:22,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-04-01 04:52:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:22,102 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-04-01 04:52:22,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-04-01 04:52:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 04:52:22,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:22,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:22,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:52:22,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:22,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:22,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1123260123, now seen corresponding path program 1 times [2023-04-01 04:52:22,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:22,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920409022] [2023-04-01 04:52:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:22,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:22,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920409022] [2023-04-01 04:52:22,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920409022] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:52:22,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:52:22,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 04:52:22,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714357868] [2023-04-01 04:52:22,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:52:22,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:52:22,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:22,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:52:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:52:22,480 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:22,635 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-01 04:52:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:52:22,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 04:52:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:22,637 INFO L225 Difference]: With dead ends: 54 [2023-04-01 04:52:22,637 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 04:52:22,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:52:22,642 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:22,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 80 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:52:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 04:52:22,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2023-04-01 04:52:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-04-01 04:52:22,652 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2023-04-01 04:52:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:22,653 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-04-01 04:52:22,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-04-01 04:52:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:52:22,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:22,654 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:22,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:52:22,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:22,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:22,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1375651936, now seen corresponding path program 1 times [2023-04-01 04:52:22,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:22,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526780206] [2023-04-01 04:52:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:22,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:22,958 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 04:52:22,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:22,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526780206] [2023-04-01 04:52:22,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526780206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:52:22,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098759525] [2023-04-01 04:52:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:22,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:22,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:52:22,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:52:23,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:52:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:23,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 04:52:23,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:52:23,148 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 04:52:23,184 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 04:52:23,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:52:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098759525] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:52:23,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:52:23,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 04:52:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382358624] [2023-04-01 04:52:23,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:52:23,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:52:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:23,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:52:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:52:23,186 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:23,233 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-04-01 04:52:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:52:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 04:52:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:23,234 INFO L225 Difference]: With dead ends: 49 [2023-04-01 04:52:23,234 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 04:52:23,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 04:52:23,235 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:23,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:52:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 04:52:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-04-01 04:52:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-04-01 04:52:23,239 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 18 [2023-04-01 04:52:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:23,239 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-04-01 04:52:23,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-04-01 04:52:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:52:23,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:23,240 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:23,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:52:23,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:23,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:23,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1848819830, now seen corresponding path program 1 times [2023-04-01 04:52:23,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:23,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741298258] [2023-04-01 04:52:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:23,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:23,778 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 04:52:23,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:23,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741298258] [2023-04-01 04:52:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741298258] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:52:23,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073248785] [2023-04-01 04:52:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:23,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:23,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:52:23,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:52:23,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:52:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:23,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 04:52:23,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:52:23,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:52:23,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:52:24,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 04:52:24,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:24,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 04:52:24,040 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 04:52:24,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 04:52:24,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:52:24,092 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 04:52:24,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-04-01 04:52:24,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-01 04:52:24,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:52:24,163 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 27 treesize of output 15 [2023-04-01 04:52:24,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 04:52:24,190 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 04:52:24,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:52:24,393 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 04:52:24,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073248785] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:52:24,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586821384] [2023-04-01 04:52:24,407 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:52:24,407 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:52:24,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:52:24,421 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:52:24,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:52:24,509 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:52:24,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:52:24,726 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:52:25,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '558#(and (<= 1 |#StackHeapBarrier|) (not (= main_~x~0.base 0)) (= main_~head~0.offset 0) (exists ((|v_#memory_$Pointer$.base_41| (Array Int (Array Int Int))) (v_main_~head~0.base_13 Int) (|v_#memory_$Pointer$.base_12| (Array Int (Array Int Int)))) (and (<= (+ v_main_~head~0.base_13 1) |#StackHeapBarrier|) (= (store |v_#memory_$Pointer$.base_41| main_~head~0.base (store (select |v_#memory_$Pointer$.base_41| main_~head~0.base) 4 (select (select |v_#memory_$Pointer$.base_12| main_~head~0.base) 4))) |v_#memory_$Pointer$.base_12|) (= (store |v_#memory_$Pointer$.base_12| main_~head~0.base (store (select |v_#memory_$Pointer$.base_12| main_~head~0.base) 0 v_main_~head~0.base_13)) |#memory_$Pointer$.base|))) (= (select (select |#memory_int| main_~head~0.base) 4) 1) (= main_~x~0.offset (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0)) (exists ((|v_#valid_24| (Array Int Int))) (and (= (select |v_#valid_24| main_~head~0.base) 0) (= |#valid| (store |v_#valid_24| main_~head~0.base 1)))) (< main_~head~0.base |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_41| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_12| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.offset_41| main_~head~0.base (store (select |v_#memory_$Pointer$.offset_41| main_~head~0.base) 4 (select (select |v_#memory_$Pointer$.offset_12| main_~head~0.base) 4))) |v_#memory_$Pointer$.offset_12|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_12| main_~head~0.base (store (select |v_#memory_$Pointer$.offset_12| main_~head~0.base) 0 0))))) (exists ((|v_#length_20| (Array Int Int))) (= (store |v_#length_20| main_~head~0.base 8) |#length|)) (not (= main_~head~0.base 0)) (= (select (select |#memory_int| main_~x~0.base) (+ main_~x~0.offset 4)) 1) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| main_~head~0.base) 0) main_~x~0.base) (= |#NULL.base| 0))' at error location [2023-04-01 04:52:25,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:52:25,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:52:25,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-04-01 04:52:25,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123253008] [2023-04-01 04:52:25,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:52:25,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 04:52:25,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 04:52:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2023-04-01 04:52:25,948 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:26,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:26,224 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2023-04-01 04:52:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 04:52:26,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 04:52:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:26,226 INFO L225 Difference]: With dead ends: 71 [2023-04-01 04:52:26,226 INFO L226 Difference]: Without dead ends: 69 [2023-04-01 04:52:26,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 04:52:26,227 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:26,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 148 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:52:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-04-01 04:52:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2023-04-01 04:52:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-04-01 04:52:26,233 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 18 [2023-04-01 04:52:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:26,233 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-04-01 04:52:26,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-04-01 04:52:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 04:52:26,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:26,234 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:26,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:52:26,442 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,SelfDestructingSolverStorable3 [2023-04-01 04:52:26,445 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:26,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash 970186519, now seen corresponding path program 1 times [2023-04-01 04:52:26,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:26,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890489196] [2023-04-01 04:52:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:26,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:26,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:26,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890489196] [2023-04-01 04:52:26,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890489196] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:52:26,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104375838] [2023-04-01 04:52:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:26,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:26,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:52:26,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:52:26,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:52:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:26,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 04:52:26,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:52:26,784 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 04:52:26,788 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 04:52:26,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:52:26,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:52:26,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:26,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 04:52:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:26,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-04-01 04:52:26,847 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 04:52:26,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-04-01 04:52:26,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:52:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:26,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:52:26,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:26,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-04-01 04:52:27,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:27,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-04-01 04:52:27,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 04:52:27,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 04:52:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:27,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104375838] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:52:27,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798325270] [2023-04-01 04:52:27,110 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 04:52:27,110 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:52:27,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:52:27,111 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:52:27,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:52:27,128 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:52:27,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:52:27,237 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:52:28,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '853#(and (<= 1 |#StackHeapBarrier|) (= main_~head~0.offset 0) (<= (+ main_~head~0.base 1) |#StackHeapBarrier|) (or (not (= main_~x~0.base 0)) (not (= main_~x~0.offset 0))) (= (select (select |#memory_int| main_~x~0.base) (+ main_~x~0.offset 4)) 1) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:52:28,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:52:28,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:52:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-04-01 04:52:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139520566] [2023-04-01 04:52:28,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:52:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 04:52:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 04:52:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-04-01 04:52:28,117 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:28,367 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2023-04-01 04:52:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:52:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 04:52:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:28,368 INFO L225 Difference]: With dead ends: 81 [2023-04-01 04:52:28,368 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 04:52:28,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-04-01 04:52:28,369 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:28,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 161 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:52:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 04:52:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2023-04-01 04:52:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-04-01 04:52:28,375 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 19 [2023-04-01 04:52:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:28,375 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-04-01 04:52:28,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-04-01 04:52:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 04:52:28,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:28,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:28,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:52:28,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:28,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:28,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1643920063, now seen corresponding path program 1 times [2023-04-01 04:52:28,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:28,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949008161] [2023-04-01 04:52:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:28,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:28,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949008161] [2023-04-01 04:52:28,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949008161] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:52:28,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:52:28,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:52:28,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474746104] [2023-04-01 04:52:28,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:52:28,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:52:28,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:52:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:52:28,703 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:28,767 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2023-04-01 04:52:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:52:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 04:52:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:28,768 INFO L225 Difference]: With dead ends: 75 [2023-04-01 04:52:28,768 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 04:52:28,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:52:28,769 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:28,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:52:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 04:52:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2023-04-01 04:52:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-04-01 04:52:28,774 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 19 [2023-04-01 04:52:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:28,774 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-04-01 04:52:28,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-04-01 04:52:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:52:28,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:28,774 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] [2023-04-01 04:52:28,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:52:28,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:28,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:28,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2051054458, now seen corresponding path program 1 times [2023-04-01 04:52:28,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:28,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598297058] [2023-04-01 04:52:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:28,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:28,847 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 04:52:28,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:28,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598297058] [2023-04-01 04:52:28,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598297058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:52:28,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:52:28,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:52:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189061258] [2023-04-01 04:52:28,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:52:28,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:52:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:52:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:52:28,848 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:28,926 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2023-04-01 04:52:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:52:28,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 04:52:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:28,927 INFO L225 Difference]: With dead ends: 69 [2023-04-01 04:52:28,927 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 04:52:28,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:52:28,928 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:28,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:52:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 04:52:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2023-04-01 04:52:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-04-01 04:52:28,932 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 21 [2023-04-01 04:52:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:28,932 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-04-01 04:52:28,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-04-01 04:52:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:52:28,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:28,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:28,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:52:28,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:28,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash -450983012, now seen corresponding path program 1 times [2023-04-01 04:52:28,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:28,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896694173] [2023-04-01 04:52:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:28,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:29,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:29,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896694173] [2023-04-01 04:52:29,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896694173] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:52:29,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162774952] [2023-04-01 04:52:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:29,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:29,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:52:29,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:52:29,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:52:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:29,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 81 conjunts are in the unsatisfiable core [2023-04-01 04:52:29,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:52:29,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:52:29,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:52:29,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:29,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-04-01 04:52:29,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:52:29,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-04-01 04:52:29,500 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 04:52:29,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2023-04-01 04:52:29,509 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-04-01 04:52:29,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-04-01 04:52:29,523 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2023-04-01 04:52:29,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2023-04-01 04:52:29,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:52:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:29,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-04-01 04:52:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:29,604 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-04-01 04:52:29,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 50 [2023-04-01 04:52:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:29,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-04-01 04:52:29,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:52:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:29,625 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-04-01 04:52:29,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-04-01 04:52:29,908 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:52:29,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 32 [2023-04-01 04:52:29,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:29,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 04:52:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:29,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:52:30,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:30,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-04-01 04:52:30,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:30,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2023-04-01 04:52:30,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:30,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 77 [2023-04-01 04:52:30,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:30,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 399 treesize of output 334 [2023-04-01 04:52:30,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:30,312 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 275 treesize of output 277 [2023-04-01 04:52:30,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:30,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 241 [2023-04-01 04:52:30,330 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 232 treesize of output 230 [2023-04-01 04:52:30,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:30,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 839 treesize of output 830 [2023-04-01 04:52:30,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:30,366 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 203 treesize of output 205 [2023-04-01 04:52:30,377 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 192 treesize of output 190 [2023-04-01 04:52:31,758 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 04:52:31,758 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 14 treesize of output 11 [2023-04-01 04:52:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162774952] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:52:35,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216779452] [2023-04-01 04:52:35,346 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 04:52:35,347 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:52:35,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:52:35,347 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:52:35,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:52:35,365 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:52:35,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:52:35,511 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:52:36,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1541#(and (<= 1 |#StackHeapBarrier|) (= main_~head~0.offset 0) (<= (+ main_~head~0.base 1) |#StackHeapBarrier|) (or (not (= main_~x~0.base 0)) (not (= main_~x~0.offset 0))) (= (select (select |#memory_int| main_~x~0.base) (+ main_~x~0.offset 4)) 1) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:52:36,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:52:36,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:52:36,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 13] total 27 [2023-04-01 04:52:36,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595343605] [2023-04-01 04:52:36,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:52:36,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 04:52:36,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 04:52:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 04:52:36,355 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:37,397 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2023-04-01 04:52:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 04:52:37,398 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 04:52:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:37,398 INFO L225 Difference]: With dead ends: 106 [2023-04-01 04:52:37,398 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 04:52:37,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=356, Invalid=2400, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 04:52:37,400 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:37,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 275 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 317 Invalid, 3 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 04:52:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 04:52:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 57. [2023-04-01 04:52:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-04-01 04:52:37,408 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 21 [2023-04-01 04:52:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:37,409 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-04-01 04:52:37,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-04-01 04:52:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:52:37,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:37,409 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:37,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:52:37,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:37,619 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:37,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:37,620 INFO L85 PathProgramCache]: Analyzing trace with hash -395302175, now seen corresponding path program 2 times [2023-04-01 04:52:37,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:37,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997656710] [2023-04-01 04:52:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:37,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:38,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:38,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997656710] [2023-04-01 04:52:38,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997656710] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:52:38,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594442047] [2023-04-01 04:52:38,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:52:38,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:52:38,267 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:52:38,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 04:52:38,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:52:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:52:38,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 04:52:38,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:52:38,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:52:38,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:52:38,460 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:52:38,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-04-01 04:52:38,465 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 04:52:38,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:52:38,477 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:52:38,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-04-01 04:52:38,482 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 04:52:38,488 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 04:52:38,504 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 04:52:38,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 04:52:38,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:38,575 INFO L321 Elim1Store]: treesize reduction 31, result has 26.2 percent of original size [2023-04-01 04:52:38,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 78 [2023-04-01 04:52:38,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-04-01 04:52:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:38,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2023-04-01 04:52:38,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:38,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-01 04:52:38,617 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-04-01 04:52:38,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-04-01 04:52:38,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:52:38,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 04:52:38,760 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:52:38,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 04:52:38,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:38,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:38,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 61 [2023-04-01 04:52:38,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:38,788 INFO L321 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2023-04-01 04:52:38,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2023-04-01 04:52:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:38,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2023-04-01 04:52:38,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 04:52:39,228 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:52:39,231 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-04-01 04:52:39,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 54 [2023-04-01 04:52:39,240 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-01 04:52:39,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 26 [2023-04-01 04:52:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:39,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:52:39,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:39,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2023-04-01 04:52:39,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:39,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 55 [2023-04-01 04:52:39,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:39,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 251 [2023-04-01 04:52:39,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:39,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 242 [2023-04-01 04:52:40,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:40,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 328 [2023-04-01 04:52:40,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:40,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11189 treesize of output 8760 [2023-04-01 04:52:40,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:40,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1224 treesize of output 1097 [2023-04-01 04:52:40,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:40,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 1088 treesize of output 932 [2023-04-01 04:52:40,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:40,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20396 treesize of output 20051 [2023-04-01 04:52:40,957 INFO L321 Elim1Store]: treesize reduction 176, result has 39.3 percent of original size [2023-04-01 04:52:40,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 1617 treesize of output 1679 [2023-04-01 04:52:41,117 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 1323 treesize of output 1313 [2023-04-01 04:52:41,145 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 1339 treesize of output 1321 [2023-04-01 04:52:41,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:41,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1301 treesize of output 1350 [2023-04-01 04:52:41,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:41,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1253 treesize of output 1296 [2023-04-01 04:52:41,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:41,450 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 1181 treesize of output 1157 [2023-04-01 04:52:41,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:41,535 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 1224 treesize of output 1204 [2023-04-01 04:52:41,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:41,618 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 1145 treesize of output 1097 [2023-04-01 04:52:41,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:41,747 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 1160 treesize of output 1132 [2023-04-01 04:52:42,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:42,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 2113 treesize of output 2389 [2023-04-01 04:52:42,492 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 1658 treesize of output 1628 [2023-04-01 04:52:42,635 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 1559 treesize of output 1551 [2023-04-01 04:52:42,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:42,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1551 treesize of output 1600 [2023-04-01 04:52:43,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:43,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1503 treesize of output 1546 [2023-04-01 04:52:43,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:43,367 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 1488 treesize of output 1450 [2023-04-01 04:52:43,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:43,555 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 1470 treesize of output 1454 [2023-04-01 04:52:43,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:43,756 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 1460 treesize of output 1440 [2023-04-01 04:52:43,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:43,946 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 1440 treesize of output 1374