/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:15:00,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:15:00,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:15:00,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:15:00,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:15:00,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:15:00,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:15:00,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:15:00,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:15:00,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:15:00,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:15:00,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:15:00,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:15:00,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:15:00,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:15:00,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:15:00,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:15:00,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:15:00,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:15:00,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:15:00,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:15:00,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:15:00,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:15:00,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:15:00,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 00:15:00,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 00:15:00,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 00:15:00,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 00:15:00,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 00:15:00,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 00:15:00,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:15:00,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:15:00,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:15:00,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:15:00,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:15:00,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:15:00,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:15:00,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:15:00,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:15:00,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:15:00,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:15:00,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:15:00,285 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:15:00,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:15:00,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:15:00,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:15:00,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:15:00,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:15:00,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:15:00,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:15:00,288 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:15:00,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:15:00,288 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:15:00,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:15:00,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:15:00,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:15:00,290 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:15:00,291 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:15:00,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:15:00,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:15:00,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:15:00,485 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:15:00,498 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:15:00,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2023-03-31 00:15:01,572 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:15:01,771 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:15:01,771 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2023-03-31 00:15:01,794 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e61476cb6/9af32081583f460783bc7643bc3d9fab/FLAG36a1702b5 [2023-03-31 00:15:01,806 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e61476cb6/9af32081583f460783bc7643bc3d9fab [2023-03-31 00:15:01,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:15:01,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:15:01,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:15:01,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:15:01,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:15:01,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:15:01" (1/1) ... [2023-03-31 00:15:01,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7228b062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:01, skipping insertion in model container [2023-03-31 00:15:01,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:15:01" (1/1) ... [2023-03-31 00:15:01,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:15:01,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:15:02,102 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/list-ext3-properties/dll_nullified-2.i[23974,23987] [2023-03-31 00:15:02,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:15:02,118 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:15:02,155 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/list-ext3-properties/dll_nullified-2.i[23974,23987] [2023-03-31 00:15:02,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:15:02,178 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:15:02,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02 WrapperNode [2023-03-31 00:15:02,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:15:02,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:15:02,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:15:02,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:15:02,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,215 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:15:02,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:15:02,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:15:02,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:15:02,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (1/1) ... [2023-03-31 00:15:02,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:15:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:02,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 00:15:02,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 00:15:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:15:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:15:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:15:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 00:15:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 00:15:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 00:15:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-03-31 00:15:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:15:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:15:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:15:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:15:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:15:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:15:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:15:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 00:15:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 00:15:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 00:15:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 00:15:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 00:15:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 00:15:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 00:15:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 00:15:02,308 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 00:15:02,309 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:15:02,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:15:02,465 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:15:02,467 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:15:02,514 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 00:15:02,643 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:15:02,647 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:15:02,647 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 00:15:02,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:15:02 BoogieIcfgContainer [2023-03-31 00:15:02,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:15:02,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:15:02,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:15:02,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:15:02,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:15:01" (1/3) ... [2023-03-31 00:15:02,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d06894c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:15:02, skipping insertion in model container [2023-03-31 00:15:02,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:02" (2/3) ... [2023-03-31 00:15:02,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d06894c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:15:02, skipping insertion in model container [2023-03-31 00:15:02,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:15:02" (3/3) ... [2023-03-31 00:15:02,654 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nullified-2.i [2023-03-31 00:15:02,668 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:15:02,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:15:02,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:15:02,714 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@61424e2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:15:02,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:15:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:15:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 00:15:02,723 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:02,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:02,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:02,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash -229834151, now seen corresponding path program 1 times [2023-03-31 00:15:02,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:02,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677448122] [2023-03-31 00:15:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:02,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:02,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:02,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677448122] [2023-03-31 00:15:02,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677448122] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:02,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:15:02,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:15:02,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314501260] [2023-03-31 00:15:02,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:02,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:15:02,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:15:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:15:02,979 INFO L87 Difference]: Start difference. First operand has 38 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:15:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:03,163 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2023-03-31 00:15:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:15:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-03-31 00:15:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:03,195 INFO L225 Difference]: With dead ends: 81 [2023-03-31 00:15:03,195 INFO L226 Difference]: Without dead ends: 48 [2023-03-31 00:15:03,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:15:03,201 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 96 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:03,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 7 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-03-31 00:15:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2023-03-31 00:15:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-03-31 00:15:03,232 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 20 [2023-03-31 00:15:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:03,233 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-03-31 00:15:03,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:15:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-03-31 00:15:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 00:15:03,233 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:03,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:03,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:15:03,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:03,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:03,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1798662849, now seen corresponding path program 1 times [2023-03-31 00:15:03,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:03,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827120472] [2023-03-31 00:15:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:03,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:03,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:03,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:03,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827120472] [2023-03-31 00:15:03,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827120472] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:03,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:15:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 00:15:03,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702251359] [2023-03-31 00:15:03,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:03,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 00:15:03,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 00:15:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:15:03,405 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:03,597 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2023-03-31 00:15:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:15:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-03-31 00:15:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:03,598 INFO L225 Difference]: With dead ends: 52 [2023-03-31 00:15:03,598 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 00:15:03,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:15:03,599 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:03,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 9 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 00:15:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-03-31 00:15:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-03-31 00:15:03,605 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 20 [2023-03-31 00:15:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:03,605 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-03-31 00:15:03,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-03-31 00:15:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 00:15:03,606 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:03,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:03,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:15:03,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:03,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:03,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1790055781, now seen corresponding path program 1 times [2023-03-31 00:15:03,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:03,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380523211] [2023-03-31 00:15:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:03,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:03,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:03,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:03,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:03,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380523211] [2023-03-31 00:15:03,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380523211] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:03,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:15:03,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:15:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107718625] [2023-03-31 00:15:03,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:03,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:15:03,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:03,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:15:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:15:03,748 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:15:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:03,874 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-03-31 00:15:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:15:03,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-03-31 00:15:03,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:03,875 INFO L225 Difference]: With dead ends: 57 [2023-03-31 00:15:03,875 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 00:15:03,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:15:03,876 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:03,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 5 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 00:15:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-03-31 00:15:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-03-31 00:15:03,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 25 [2023-03-31 00:15:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:03,881 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-03-31 00:15:03,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:15:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-03-31 00:15:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 00:15:03,881 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:03,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:03,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 00:15:03,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:03,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1493794265, now seen corresponding path program 1 times [2023-03-31 00:15:03,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:03,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104023383] [2023-03-31 00:15:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:03,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:03,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:04,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:04,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104023383] [2023-03-31 00:15:04,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104023383] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:04,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169472175] [2023-03-31 00:15:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:04,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:04,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:04,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:15:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:04,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:15:04,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:04,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:04,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169472175] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:04,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:04,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2023-03-31 00:15:04,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304968602] [2023-03-31 00:15:04,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:04,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 00:15:04,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:04,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 00:15:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:15:04,378 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:15:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:04,637 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2023-03-31 00:15:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 00:15:04,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-03-31 00:15:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:04,638 INFO L225 Difference]: With dead ends: 57 [2023-03-31 00:15:04,638 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 00:15:04,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:15:04,639 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 86 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:04,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 11 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:15:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 00:15:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-03-31 00:15:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-03-31 00:15:04,667 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 25 [2023-03-31 00:15:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:04,667 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-03-31 00:15:04,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:15:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-03-31 00:15:04,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 00:15:04,668 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:04,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:04,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:04,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:04,875 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:04,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:04,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1293266367, now seen corresponding path program 1 times [2023-03-31 00:15:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:04,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094237755] [2023-03-31 00:15:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:04,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:04,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:05,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:05,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094237755] [2023-03-31 00:15:05,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094237755] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:05,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325508338] [2023-03-31 00:15:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:05,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:05,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:05,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:15:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:05,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 00:15:05,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:05,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325508338] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:05,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:05,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2023-03-31 00:15:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320937458] [2023-03-31 00:15:05,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:05,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:15:05,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:15:05,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:15:05,404 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:15:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:05,771 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2023-03-31 00:15:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 00:15:05,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-03-31 00:15:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:05,773 INFO L225 Difference]: With dead ends: 62 [2023-03-31 00:15:05,774 INFO L226 Difference]: Without dead ends: 45 [2023-03-31 00:15:05,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:15:05,775 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 89 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:05,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 13 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:15:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-03-31 00:15:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2023-03-31 00:15:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-03-31 00:15:05,787 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 30 [2023-03-31 00:15:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:05,788 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-03-31 00:15:05,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:15:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-03-31 00:15:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 00:15:05,789 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:05,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:05,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 00:15:05,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:05,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:05,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash -102367527, now seen corresponding path program 2 times [2023-03-31 00:15:05,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:05,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110104796] [2023-03-31 00:15:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:05,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:06,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:06,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:06,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:06,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110104796] [2023-03-31 00:15:06,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110104796] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:06,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044350675] [2023-03-31 00:15:06,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:15:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:06,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:06,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:15:06,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:15:06,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:06,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:15:06,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:06,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:06,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044350675] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:06,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:06,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2023-03-31 00:15:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774265262] [2023-03-31 00:15:06,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:06,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 00:15:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 00:15:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-03-31 00:15:06,581 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 16 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:15:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:06,937 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2023-03-31 00:15:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 00:15:06,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2023-03-31 00:15:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:06,938 INFO L225 Difference]: With dead ends: 67 [2023-03-31 00:15:06,938 INFO L226 Difference]: Without dead ends: 50 [2023-03-31 00:15:06,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:15:06,938 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:06,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 15 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:15:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-31 00:15:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-03-31 00:15:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-03-31 00:15:06,943 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 35 [2023-03-31 00:15:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:06,943 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-03-31 00:15:06,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:15:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-03-31 00:15:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 00:15:06,944 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:06,944 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:06,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:07,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:07,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:07,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1555460417, now seen corresponding path program 3 times [2023-03-31 00:15:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:07,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752357842] [2023-03-31 00:15:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:07,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:07,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:07,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752357842] [2023-03-31 00:15:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752357842] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759376634] [2023-03-31 00:15:07,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:15:07,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:07,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:07,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:07,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:15:08,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 00:15:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:08,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-31 00:15:08,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:08,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-03-31 00:15:08,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:15:08,535 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-03-31 00:15:08,536 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 2 case distinctions, treesize of input 28 treesize of output 38 [2023-03-31 00:15:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 00:15:08,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:15:08,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759376634] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:08,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:15:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2023-03-31 00:15:08,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828834379] [2023-03-31 00:15:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 00:15:08,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 00:15:08,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-03-31 00:15:08,655 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:15:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:08,916 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2023-03-31 00:15:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 00:15:08,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-03-31 00:15:08,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:08,917 INFO L225 Difference]: With dead ends: 75 [2023-03-31 00:15:08,917 INFO L226 Difference]: Without dead ends: 62 [2023-03-31 00:15:08,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2023-03-31 00:15:08,918 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:08,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 189 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:15:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-03-31 00:15:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2023-03-31 00:15:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-03-31 00:15:08,923 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 40 [2023-03-31 00:15:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:08,923 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-03-31 00:15:08,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:15:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-03-31 00:15:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 00:15:08,924 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:08,924 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:08,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:09,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:09,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1555462339, now seen corresponding path program 1 times [2023-03-31 00:15:09,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:09,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283030750] [2023-03-31 00:15:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:09,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:09,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:09,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:09,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:09,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283030750] [2023-03-31 00:15:09,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283030750] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:09,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889698414] [2023-03-31 00:15:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:09,382 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:09,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:15:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:09,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 00:15:09,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:09,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:09,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889698414] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:09,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:09,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 17 [2023-03-31 00:15:09,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471581774] [2023-03-31 00:15:09,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:09,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 00:15:09,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:09,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 00:15:09,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-03-31 00:15:09,782 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:10,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:10,101 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-03-31 00:15:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 00:15:10,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2023-03-31 00:15:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:10,102 INFO L225 Difference]: With dead ends: 82 [2023-03-31 00:15:10,102 INFO L226 Difference]: Without dead ends: 60 [2023-03-31 00:15:10,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2023-03-31 00:15:10,103 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 107 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:10,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 13 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:15:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-03-31 00:15:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-03-31 00:15:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2023-03-31 00:15:10,108 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 40 [2023-03-31 00:15:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:10,108 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2023-03-31 00:15:10,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2023-03-31 00:15:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 00:15:10,109 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:10,109 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:10,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:10,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:10,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:10,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:10,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1976911707, now seen corresponding path program 2 times [2023-03-31 00:15:10,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:10,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378392927] [2023-03-31 00:15:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:10,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:11,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:11,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:15:11,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378392927] [2023-03-31 00:15:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378392927] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592413075] [2023-03-31 00:15:11,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:15:11,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:11,398 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:11,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:15:11,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:15:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:11,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 40 conjunts are in the unsatisfiable core [2023-03-31 00:15:11,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:11,645 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 [2023-03-31 00:15:11,656 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 00:15:11,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 00:15:11,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-03-31 00:15:11,681 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 [2023-03-31 00:15:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:15:11,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:11,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:11,931 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 5 case distinctions, treesize of input 40 treesize of output 61 [2023-03-31 00:15:11,934 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 36 treesize of output 24 [2023-03-31 00:15:11,936 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 7 treesize of output 3 [2023-03-31 00:15:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:15:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592413075] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:11,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:11,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2023-03-31 00:15:11,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010019468] [2023-03-31 00:15:11,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:11,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-03-31 00:15:11,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-03-31 00:15:11,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=442, Unknown=7, NotChecked=0, Total=506 [2023-03-31 00:15:11,982 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:15:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:12,722 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2023-03-31 00:15:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 00:15:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-03-31 00:15:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:12,723 INFO L225 Difference]: With dead ends: 70 [2023-03-31 00:15:12,723 INFO L226 Difference]: Without dead ends: 68 [2023-03-31 00:15:12,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=1057, Unknown=7, NotChecked=0, Total=1260 [2023-03-31 00:15:12,724 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:12,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 35 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 00:15:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-03-31 00:15:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2023-03-31 00:15:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 53 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-03-31 00:15:12,729 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 45 [2023-03-31 00:15:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:12,729 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-03-31 00:15:12,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:15:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-03-31 00:15:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 00:15:12,730 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:12,730 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:12,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:12,931 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:12,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:12,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1975062743, now seen corresponding path program 1 times [2023-03-31 00:15:12,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:12,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705959017] [2023-03-31 00:15:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:12,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:13,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:13,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:15:13,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:13,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705959017] [2023-03-31 00:15:13,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705959017] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:13,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252097351] [2023-03-31 00:15:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:13,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:13,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:13,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:13,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:15:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:13,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 40 conjunts are in the unsatisfiable core [2023-03-31 00:15:13,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:13,868 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 [2023-03-31 00:15:13,879 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 00:15:13,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 00:15:13,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-03-31 00:15:13,924 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 21 [2023-03-31 00:15:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:15:14,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:14,122 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2365 (Array Int Int))) (= (select (select (store |c_#memory_int| c_dll_create_~head~0.base v_ArrVal_2365) c_dll_create_~new_head~0.base) c_dll_create_~new_head~0.offset) 0)) is different from false [2023-03-31 00:15:14,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:14,135 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 5 case distinctions, treesize of input 38 treesize of output 59 [2023-03-31 00:15:14,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:14,140 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 40 treesize of output 26 [2023-03-31 00:15:14,142 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 [2023-03-31 00:15:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 1 not checked. [2023-03-31 00:15:14,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252097351] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:14,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:14,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 24 [2023-03-31 00:15:14,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451500175] [2023-03-31 00:15:14,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:14,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-31 00:15:14,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-31 00:15:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=449, Unknown=1, NotChecked=42, Total=552 [2023-03-31 00:15:14,173 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:15:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:14,900 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2023-03-31 00:15:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 00:15:14,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-03-31 00:15:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:14,901 INFO L225 Difference]: With dead ends: 80 [2023-03-31 00:15:14,901 INFO L226 Difference]: Without dead ends: 64 [2023-03-31 00:15:14,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1164, Unknown=1, NotChecked=72, Total=1482 [2023-03-31 00:15:14,902 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 14 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:14,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 25 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 476 Invalid, 6 Unknown, 61 Unchecked, 0.5s Time] [2023-03-31 00:15:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-03-31 00:15:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2023-03-31 00:15:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-03-31 00:15:14,906 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 45 [2023-03-31 00:15:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:14,906 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-03-31 00:15:14,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:15:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-03-31 00:15:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 00:15:14,906 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:14,907 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:14,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-31 00:15:15,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:15,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:15,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:15,113 INFO L85 PathProgramCache]: Analyzing trace with hash 90638010, now seen corresponding path program 1 times [2023-03-31 00:15:15,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:15,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578082093] [2023-03-31 00:15:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:15,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:15,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:15,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:15:15,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:15,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578082093] [2023-03-31 00:15:15,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578082093] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:15,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286491664] [2023-03-31 00:15:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:15,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:15,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:15,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:15,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:15:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:15,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 39 conjunts are in the unsatisfiable core [2023-03-31 00:15:15,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:15,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:15:15,949 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 00:15:15,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 00:15:15,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-03-31 00:15:16,017 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-03-31 00:15:16,018 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 27 treesize of output 28 [2023-03-31 00:15:16,162 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 24 treesize of output 12 [2023-03-31 00:15:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:15:16,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:16,325 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2865 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_2865) c_dll_create_~new_head~0.base) (+ c_dll_create_~new_head~0.offset 4)) 0))) is different from false [2023-03-31 00:15:16,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:16,331 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 2 case distinctions, treesize of input 28 treesize of output 34 [2023-03-31 00:15:16,333 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 39 treesize of output 27 [2023-03-31 00:15:16,336 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 8 treesize of output 4 [2023-03-31 00:15:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 1 not checked. [2023-03-31 00:15:16,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286491664] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:16,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:16,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2023-03-31 00:15:16,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363694819] [2023-03-31 00:15:16,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-03-31 00:15:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-03-31 00:15:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=913, Unknown=1, NotChecked=60, Total=1056 [2023-03-31 00:15:16,429 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 28 states have internal predecessors, (67), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 00:15:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:17,612 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2023-03-31 00:15:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 00:15:17,612 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 28 states have internal predecessors, (67), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2023-03-31 00:15:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:17,613 INFO L225 Difference]: With dead ends: 97 [2023-03-31 00:15:17,613 INFO L226 Difference]: Without dead ends: 57 [2023-03-31 00:15:17,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1936, Unknown=1, NotChecked=92, Total=2352 [2023-03-31 00:15:17,614 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 88 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:17,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 53 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 983 Invalid, 0 Unknown, 49 Unchecked, 0.8s Time] [2023-03-31 00:15:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-31 00:15:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-03-31 00:15:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-03-31 00:15:17,618 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 46 [2023-03-31 00:15:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:17,619 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-03-31 00:15:17,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 28 states have internal predecessors, (67), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 00:15:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-03-31 00:15:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 00:15:17,619 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:17,619 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:17,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:17,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 00:15:17,826 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:17,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash -461146708, now seen corresponding path program 1 times [2023-03-31 00:15:17,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:17,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772065321] [2023-03-31 00:15:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:18,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:18,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 00:15:19,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772065321] [2023-03-31 00:15:19,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772065321] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015552788] [2023-03-31 00:15:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:19,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:19,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:19,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:19,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 00:15:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:19,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 74 conjunts are in the unsatisfiable core [2023-03-31 00:15:19,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:19,607 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 [2023-03-31 00:15:19,623 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-03-31 00:15:19,624 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 [2023-03-31 00:15:19,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-03-31 00:15:19,695 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 [2023-03-31 00:15:19,781 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-03-31 00:15:19,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-03-31 00:15:19,801 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 [2023-03-31 00:15:19,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-03-31 00:15:19,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-03-31 00:15:19,848 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-03-31 00:15:19,848 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 59 treesize of output 54 [2023-03-31 00:15:19,853 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 [2023-03-31 00:15:19,858 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 31 treesize of output 26 [2023-03-31 00:15:20,030 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 [2023-03-31 00:15:20,036 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 [2023-03-31 00:15:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 00:15:20,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:20,473 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3375 (Array Int Int)) (v_ArrVal_3376 (Array Int Int)) (v_ArrVal_3378 Int)) (= (let ((.cse0 (+ c_dll_create_~new_head~0.offset 4))) (select (select (store |c_#memory_int| c_dll_create_~head~0.base (store (select |c_#memory_int| c_dll_create_~head~0.base) (+ c_dll_create_~head~0.offset 12) v_ArrVal_3378)) (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_3375) c_dll_create_~new_head~0.base) .cse0)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base v_ArrVal_3376) c_dll_create_~new_head~0.base) .cse0)))) 0)) is different from false [2023-03-31 00:15:20,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:20,491 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 2 case distinctions, treesize of input 73 treesize of output 79 [2023-03-31 00:15:20,496 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 128 treesize of output 116 [2023-03-31 00:15:20,505 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 57 treesize of output 53 [2023-03-31 00:15:20,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:20,517 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 2 case distinctions, treesize of input 100 treesize of output 90 [2023-03-31 00:15:20,539 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 144 treesize of output 126 [2023-03-31 00:15:20,545 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 33 treesize of output 29 [2023-03-31 00:15:26,283 WARN L223 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 33 DAG size of output: 26 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 00:15:26,420 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3365 (Array Int Int)) (v_ArrVal_3369 (Array Int Int)) (v_ArrVal_3378 Int) (v_arrayElimCell_35 Int) (v_dll_create_~new_head~0.base_71 Int) (v_arrayElimCell_33 Int)) (let ((.cse1 (store (store |c_#memory_int| c_dll_create_~head~0.base v_ArrVal_3365) v_dll_create_~new_head~0.base_71 v_ArrVal_3369))) (let ((.cse0 (select .cse1 c_dll_create_~new_head~0.base))) (or (not (= (select |c_#valid| v_dll_create_~new_head~0.base_71) 0)) (= (select .cse0 (+ c_dll_create_~new_head~0.offset 8)) 0) (= (select (select (store .cse1 c_dll_create_~new_head~0.base (store .cse0 (+ c_dll_create_~new_head~0.offset 12) v_ArrVal_3378)) v_arrayElimCell_33) (+ 8 v_arrayElimCell_35)) 0))))) is different from false [2023-03-31 00:15:26,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:26,442 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 5 case distinctions, treesize of input 131 treesize of output 95 [2023-03-31 00:15:26,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:26,489 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 6481 treesize of output 6371 [2023-03-31 00:15:26,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:26,652 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 679 treesize of output 651 [2023-03-31 00:15:26,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:26,692 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 754 treesize of output 690 [2023-03-31 00:15:28,566 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 85 treesize of output 77 [2023-03-31 00:15:28,604 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 8 treesize of output 4 [2023-03-31 00:15:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 13 refuted. 2 times theorem prover too weak. 7 trivial. 3 not checked. [2023-03-31 00:15:28,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015552788] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:28,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:28,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 45 [2023-03-31 00:15:28,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96338173] [2023-03-31 00:15:28,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:28,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-03-31 00:15:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-03-31 00:15:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1651, Unknown=5, NotChecked=166, Total=1980 [2023-03-31 00:15:28,786 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 40 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 00:15:32,102 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_dll_create_~head~0.offset 8)) (.cse6 (+ c_dll_create_~head~0.offset 12)) (.cse2 (+ c_dll_create_~new_head~0.offset 4))) (and (not (= c_dll_create_~head~0.base c_dll_create_~new_head~0.base)) (= |c_#NULL.base| |c_old(#NULL.base)|) (= (select |c_#valid| c_dll_create_~head~0.base) 1) (forall ((v_ArrVal_3365 (Array Int Int)) (v_ArrVal_3369 (Array Int Int)) (v_ArrVal_3378 Int) (v_arrayElimCell_35 Int) (v_dll_create_~new_head~0.base_71 Int) (v_arrayElimCell_33 Int)) (let ((.cse1 (store (store |c_#memory_int| c_dll_create_~head~0.base v_ArrVal_3365) v_dll_create_~new_head~0.base_71 v_ArrVal_3369))) (let ((.cse0 (select .cse1 c_dll_create_~new_head~0.base))) (or (not (= (select |c_#valid| v_dll_create_~new_head~0.base_71) 0)) (= (select .cse0 (+ c_dll_create_~new_head~0.offset 8)) 0) (= (select (select (store .cse1 c_dll_create_~new_head~0.base (store .cse0 (+ c_dll_create_~new_head~0.offset 12) v_ArrVal_3378)) v_arrayElimCell_33) (+ 8 v_arrayElimCell_35)) 0))))) (= (select |c_#valid| c_dll_create_~new_head~0.base) 1) (= (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| c_dll_create_~new_head~0.base) .cse2)) (+ (select (select |c_#memory_$Pointer$.offset| c_dll_create_~new_head~0.base) .cse2) 8)) 0) (forall ((v_ArrVal_3369 (Array Int Int)) (v_ArrVal_3378 Int) (v_arrayElimCell_35 Int) (v_dll_create_~new_head~0.base_71 Int) (v_arrayElimCell_33 Int)) (let ((.cse5 (store |c_#memory_int| v_dll_create_~new_head~0.base_71 v_ArrVal_3369))) (let ((.cse3 (select .cse5 c_dll_create_~head~0.base))) (or (= (select .cse3 .cse4) 0) (not (= (select |c_#valid| v_dll_create_~new_head~0.base_71) 0)) (= (select (select (store .cse5 c_dll_create_~head~0.base (store .cse3 .cse6 v_ArrVal_3378)) v_arrayElimCell_33) (+ 8 v_arrayElimCell_35)) 0))))) (= c_dll_create_~new_head~0.offset 0) (forall ((v_ArrVal_3369 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| c_dll_create_~new_head~0.base v_ArrVal_3369))) (let ((.cse7 (select .cse8 c_dll_create_~head~0.base))) (or (= (select .cse7 .cse4) 0) (forall ((v_ArrVal_3378 Int) (v_arrayElimCell_35 Int) (v_arrayElimCell_33 Int)) (= (select (select (store .cse8 c_dll_create_~head~0.base (store .cse7 .cse6 v_ArrVal_3378)) v_arrayElimCell_33) (+ 8 v_arrayElimCell_35)) 0)))))) (= (select (select |c_#memory_int| c_dll_create_~new_head~0.base) 8) 0) (forall ((v_ArrVal_3375 (Array Int Int)) (v_ArrVal_3376 (Array Int Int)) (v_ArrVal_3378 Int)) (= (select (select (store |c_#memory_int| c_dll_create_~head~0.base (store (select |c_#memory_int| c_dll_create_~head~0.base) .cse6 v_ArrVal_3378)) (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_3375) c_dll_create_~new_head~0.base) .cse2)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base v_ArrVal_3376) c_dll_create_~new_head~0.base) .cse2))) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|))) is different from false [2023-03-31 00:15:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:37,941 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2023-03-31 00:15:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 00:15:37,941 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 40 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-03-31 00:15:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:37,942 INFO L225 Difference]: With dead ends: 86 [2023-03-31 00:15:37,942 INFO L226 Difference]: Without dead ends: 73 [2023-03-31 00:15:37,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=427, Invalid=3351, Unknown=16, NotChecked=366, Total=4160 [2023-03-31 00:15:37,944 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 149 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 25 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:37,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 49 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1122 Invalid, 35 Unknown, 188 Unchecked, 1.9s Time] [2023-03-31 00:15:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-03-31 00:15:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2023-03-31 00:15:37,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2023-03-31 00:15:37,949 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 51 [2023-03-31 00:15:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:37,949 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2023-03-31 00:15:37,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 40 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 00:15:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2023-03-31 00:15:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 00:15:37,952 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:37,952 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:37,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:38,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:38,159 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:38,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash -461144786, now seen corresponding path program 1 times [2023-03-31 00:15:38,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:38,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053013668] [2023-03-31 00:15:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:38,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:39,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:39,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:15:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 00:15:39,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:39,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053013668] [2023-03-31 00:15:39,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053013668] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:39,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166577677] [2023-03-31 00:15:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:39,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:39,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:39,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:39,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 00:15:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:39,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 78 conjunts are in the unsatisfiable core [2023-03-31 00:15:39,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:39,987 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 [2023-03-31 00:15:40,004 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-03-31 00:15:40,004 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 [2023-03-31 00:15:40,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-03-31 00:15:40,093 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 [2023-03-31 00:15:40,180 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-03-31 00:15:40,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-03-31 00:15:40,194 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 [2023-03-31 00:15:40,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-03-31 00:15:40,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-03-31 00:15:40,279 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-03-31 00:15:40,280 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 66 treesize of output 59 [2023-03-31 00:15:40,288 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 25 treesize of output 25 [2023-03-31 00:15:40,293 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 31 treesize of output 26 [2023-03-31 00:15:40,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2023-03-31 00:15:40,629 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 [2023-03-31 00:15:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 00:15:40,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:41,471 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_dll_create_~head~0.base)) (.cse1 (+ c_dll_create_~head~0.offset 12)) (.cse3 (+ c_dll_create_~new_head~0.offset 4))) (and (forall ((v_ArrVal_3921 Int) (v_ArrVal_3922 (Array Int Int)) (v_ArrVal_3923 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_3922) c_dll_create_~new_head~0.base) .cse3))) (or (= (select (select (store |c_#memory_int| c_dll_create_~head~0.base (store .cse0 .cse1 v_ArrVal_3921)) .cse2) (+ 16 (select (select (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base v_ArrVal_3923) c_dll_create_~new_head~0.base) .cse3))) 0) (= .cse2 0)))) (forall ((v_ArrVal_3921 Int) (v_ArrVal_3922 (Array Int Int)) (v_ArrVal_3923 (Array Int Int))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base v_ArrVal_3923) c_dll_create_~new_head~0.base) .cse3))) (or (= (select (select (store |c_#memory_int| c_dll_create_~head~0.base (store .cse0 .cse1 v_ArrVal_3921)) (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_3922) c_dll_create_~new_head~0.base) .cse3)) (+ 16 .cse4)) 0) (= .cse4 0)))))) is different from false [2023-03-31 00:15:41,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:41,488 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 79 [2023-03-31 00:15:41,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 120 [2023-03-31 00:15:41,502 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 57 treesize of output 53 [2023-03-31 00:15:41,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:41,511 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 2 case distinctions, treesize of input 127 treesize of output 102 [2023-03-31 00:15:41,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:41,516 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 179 treesize of output 149 [2023-03-31 00:15:41,527 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 45 treesize of output 37 [2023-03-31 00:15:41,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:41,577 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 2 case distinctions, treesize of input 101 treesize of output 91 [2023-03-31 00:15:41,582 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:41,582 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 163 treesize of output 139 [2023-03-31 00:15:41,592 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 69 treesize of output 61 [2023-03-31 00:15:41,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:41,600 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 2 case distinctions, treesize of input 100 treesize of output 90 [2023-03-31 00:15:41,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:15:41,606 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 154 treesize of output 130 [2023-03-31 00:15:41,612 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 33 treesize of output 29