/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-ext2-properties/simple_and_skiplist_2lvl-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:11:14,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:11:14,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:11:14,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:11:14,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:11:14,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:11:14,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:11:14,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:11:14,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:11:14,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:11:14,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:11:14,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:11:14,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:11:14,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:11:14,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:11:14,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:11:14,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:11:14,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:11:14,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:11:14,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:11:14,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:11:14,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:11:14,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:11:14,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:11:14,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 00:11:14,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 00:11:14,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 00:11:14,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 00:11:14,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 00:11:14,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 00:11:14,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:11:14,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:11:14,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:11:14,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:11:14,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:11:14,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:11:14,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:11:14,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:11:14,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:11:14,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:11:14,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:11:14,430 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 00:11:14,467 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:11:14,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:11:14,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:11:14,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:11:14,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:11:14,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:11:14,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:11:14,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:11:14,470 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:11:14,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:11:14,471 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:11:14,472 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:11:14,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:11:14,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:11:14,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:11:14,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:11:14,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:11:14,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:11:14,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:11:14,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:11:14,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:11:14,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:11:14,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:11:14,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:11:14,474 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:11:14,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:11:14,474 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:11:14,475 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:11:14,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:11:14,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:11:14,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:11:14,728 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:11:14,729 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:11:14,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2023-03-31 00:11:16,032 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:11:16,332 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:11:16,333 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2023-03-31 00:11:16,357 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b24fb476a/4f1e12f334184605ac936d28f1b7cda2/FLAG230d4003a [2023-03-31 00:11:16,370 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b24fb476a/4f1e12f334184605ac936d28f1b7cda2 [2023-03-31 00:11:16,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:11:16,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:11:16,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:11:16,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:11:16,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:11:16,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@209e8d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16, skipping insertion in model container [2023-03-31 00:11:16,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:11:16,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:11:16,743 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-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2023-03-31 00:11:16,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:11:16,757 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:11:16,795 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-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2023-03-31 00:11:16,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:11:16,827 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:11:16,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16 WrapperNode [2023-03-31 00:11:16,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:11:16,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:11:16,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:11:16,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:11:16,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:11:16,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:11:16,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:11:16,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:11:16,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (1/1) ... [2023-03-31 00:11:16,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:11:16,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:11:16,952 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 00:11:16,955 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 00:11:16,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:11:16,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:11:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:11:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 00:11:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 00:11:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 00:11:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2023-03-31 00:11:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2023-03-31 00:11:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2023-03-31 00:11:16,987 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2023-03-31 00:11:16,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:11:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:11:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:11:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:11:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:11:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:11:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:11:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 00:11:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 00:11:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 00:11:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 00:11:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 00:11:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 00:11:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 00:11:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 00:11:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 00:11:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 00:11:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 00:11:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 00:11:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 00:11:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 00:11:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 00:11:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 00:11:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 00:11:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 00:11:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 00:11:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 00:11:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 00:11:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 00:11:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 00:11:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 00:11:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 00:11:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 00:11:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 00:11:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 00:11:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 00:11:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 00:11:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 00:11:16,993 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 00:11:16,993 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 00:11:16,993 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 00:11:16,993 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 00:11:16,993 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 00:11:16,993 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 00:11:16,993 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 00:11:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 00:11:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 00:11:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 00:11:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 00:11:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 00:11:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 00:11:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 00:11:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 00:11:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 00:11:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 00:11:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 00:11:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 00:11:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 00:11:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 00:11:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 00:11:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 00:11:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 00:11:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 00:11:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 00:11:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 00:11:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 00:11:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 00:11:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 00:11:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 00:11:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 00:11:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 00:11:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 00:11:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 00:11:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 00:11:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 00:11:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 00:11:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 00:11:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 00:11:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 00:11:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 00:11:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 00:11:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2023-03-31 00:11:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 00:11:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2023-03-31 00:11:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 00:11:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 00:11:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2023-03-31 00:11:17,002 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2023-03-31 00:11:17,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:11:17,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:11:17,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:11:17,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:11:17,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:11:17,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:11:17,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:11:17,307 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:11:17,310 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:11:17,395 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 00:11:17,707 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:11:17,713 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:11:17,714 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-03-31 00:11:17,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:11:17 BoogieIcfgContainer [2023-03-31 00:11:17,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:11:17,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:11:17,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:11:17,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:11:17,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:11:16" (1/3) ... [2023-03-31 00:11:17,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f39e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:11:17, skipping insertion in model container [2023-03-31 00:11:17,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:11:16" (2/3) ... [2023-03-31 00:11:17,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f39e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:11:17, skipping insertion in model container [2023-03-31 00:11:17,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:11:17" (3/3) ... [2023-03-31 00:11:17,724 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2023-03-31 00:11:17,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:11:17,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:11:17,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:11:17,811 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;@42fee3cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:11:17,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:11:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 43 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:11:17,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 00:11:17,823 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:11:17,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:11:17,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:11:17,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:11:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash -140425679, now seen corresponding path program 1 times [2023-03-31 00:11:17,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:11:17,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928591067] [2023-03-31 00:11:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:17,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:11:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:18,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:11:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:18,045 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 00:11:18,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:11:18,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928591067] [2023-03-31 00:11:18,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928591067] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:11:18,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:11:18,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:11:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334390139] [2023-03-31 00:11:18,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:11:18,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:11:18,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:11:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:11:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:11:18,103 INFO L87 Difference]: Start difference. First operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 43 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:11:18,321 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2023-03-31 00:11:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:11:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 00:11:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:11:18,329 INFO L225 Difference]: With dead ends: 92 [2023-03-31 00:11:18,329 INFO L226 Difference]: Without dead ends: 18 [2023-03-31 00:11:18,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:11:18,337 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:11:18,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 10 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:11:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-03-31 00:11:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-03-31 00:11:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-03-31 00:11:18,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-03-31 00:11:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:11:18,366 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-03-31 00:11:18,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-03-31 00:11:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 00:11:18,367 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:11:18,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:11:18,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:11:18,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:11:18,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:11:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -500866268, now seen corresponding path program 1 times [2023-03-31 00:11:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:11:18,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619983088] [2023-03-31 00:11:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:11:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:11:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:18,559 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 00:11:18,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:11:18,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619983088] [2023-03-31 00:11:18,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619983088] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:11:18,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:11:18,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:11:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48945533] [2023-03-31 00:11:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:11:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:11:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:11:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:11:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:11:18,562 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:11:18,686 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-03-31 00:11:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:11:18,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 00:11:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:11:18,688 INFO L225 Difference]: With dead ends: 33 [2023-03-31 00:11:18,689 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 00:11:18,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:11:18,694 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:11:18,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 21 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:11:18,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 00:11:18,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-03-31 00:11:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-03-31 00:11:18,702 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2023-03-31 00:11:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:11:18,702 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-03-31 00:11:18,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-03-31 00:11:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:11:18,703 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:11:18,703 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:11:18,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:11:18,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:11:18,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:11:18,704 INFO L85 PathProgramCache]: Analyzing trace with hash -585734747, now seen corresponding path program 1 times [2023-03-31 00:11:18,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:11:18,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031400905] [2023-03-31 00:11:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:18,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:11:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:18,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:11:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:11:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031400905] [2023-03-31 00:11:18,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031400905] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:11:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229582767] [2023-03-31 00:11:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:18,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:18,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:11:19,014 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 00:11:19,061 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 00:11:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:19,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-31 00:11:19,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:11:19,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:19,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:19,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:11:19,424 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 21 [2023-03-31 00:11:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:11:19,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:11:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229582767] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:11:19,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:11:19,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 9 [2023-03-31 00:11:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167294986] [2023-03-31 00:11:19,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:11:19,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:11:19,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:11:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:11:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:11:19,484 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:11:19,593 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-03-31 00:11:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:11:19,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 00:11:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:11:19,595 INFO L225 Difference]: With dead ends: 37 [2023-03-31 00:11:19,595 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 00:11:19,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:11:19,598 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:11:19,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 27 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:11:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 00:11:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-03-31 00:11:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-03-31 00:11:19,614 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2023-03-31 00:11:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:11:19,614 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-03-31 00:11:19,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-03-31 00:11:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:11:19,615 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:11:19,615 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:11:19,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 00:11:19,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:19,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:11:19,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:11:19,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1821561269, now seen corresponding path program 1 times [2023-03-31 00:11:19,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:11:19,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31607038] [2023-03-31 00:11:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:19,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:11:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:20,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:11:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:20,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:11:20,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31607038] [2023-03-31 00:11:20,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31607038] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:11:20,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661472016] [2023-03-31 00:11:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:20,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:20,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:11:20,104 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 00:11:20,107 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 00:11:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:20,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 00:11:20,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:11:20,263 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 00:11:20,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:20,351 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 00:11:20,352 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 00:11:20,402 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 19 treesize of output 18 [2023-03-31 00:11:20,455 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 00:11:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:20,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:11:20,582 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 169 treesize of output 161 [2023-03-31 00:11:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:20,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661472016] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:11:20,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:11:20,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-03-31 00:11:20,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16517032] [2023-03-31 00:11:20,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:11:20,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 00:11:20,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:11:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 00:11:20,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-03-31 00:11:20,709 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:11:21,014 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-03-31 00:11:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:11:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-31 00:11:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:11:21,018 INFO L225 Difference]: With dead ends: 27 [2023-03-31 00:11:21,018 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 00:11:21,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:11:21,019 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:11:21,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 40 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:11:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 00:11:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-03-31 00:11:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-03-31 00:11:21,023 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2023-03-31 00:11:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:11:21,024 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-03-31 00:11:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-03-31 00:11:21,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 00:11:21,024 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:11:21,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:11:21,033 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 00:11:21,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 00:11:21,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:11:21,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:11:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash 784889118, now seen corresponding path program 1 times [2023-03-31 00:11:21,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:11:21,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890249934] [2023-03-31 00:11:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:21,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:11:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:21,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:11:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:21,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:11:21,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890249934] [2023-03-31 00:11:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890249934] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:11:21,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160555688] [2023-03-31 00:11:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:21,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:11:21,816 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 00:11:21,820 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 00:11:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:21,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2023-03-31 00:11:21,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:11:22,000 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 00:11:22,030 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 00:11:22,031 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 00:11:22,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:22,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:22,121 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-03-31 00:11:22,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2023-03-31 00:11:22,128 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 00:11:22,133 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 22 treesize of output 23 [2023-03-31 00:11:22,175 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 00:11:22,193 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 00:11:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:22,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:11:22,243 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 452 treesize of output 408 [2023-03-31 00:11:22,282 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~a~0.offset 4))) (and (forall ((v_ArrVal_183 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_183) c_main_~a~0.base) .cse0) c_main_~p~0.base)) (forall ((v_ArrVal_179 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_179) c_main_~a~0.base) .cse0) c_main_~p~0.offset)))) is different from false [2023-03-31 00:11:22,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:22,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-03-31 00:11:22,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:22,336 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 36 treesize of output 35 [2023-03-31 00:11:22,357 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 00:11:22,371 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-03-31 00:11:22,371 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 1 case distinctions, treesize of input 22 treesize of output 1 [2023-03-31 00:11:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-03-31 00:11:22,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160555688] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:11:22,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:11:22,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2023-03-31 00:11:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877282439] [2023-03-31 00:11:22,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:11:22,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 00:11:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:11:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 00:11:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2023-03-31 00:11:22,472 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:11:22,860 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-03-31 00:11:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 00:11:22,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-03-31 00:11:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:11:22,861 INFO L225 Difference]: With dead ends: 36 [2023-03-31 00:11:22,862 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 00:11:22,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=437, Unknown=1, NotChecked=44, Total=600 [2023-03-31 00:11:22,863 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 17 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:11:22,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 42 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 131 Invalid, 30 Unknown, 29 Unchecked, 0.2s Time] [2023-03-31 00:11:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 00:11:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2023-03-31 00:11:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-03-31 00:11:22,869 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2023-03-31 00:11:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:11:22,869 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-03-31 00:11:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-03-31 00:11:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 00:11:22,870 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:11:22,870 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:11:22,879 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 00:11:23,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:23,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:11:23,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:11:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash 834623851, now seen corresponding path program 2 times [2023-03-31 00:11:23,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:11:23,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515395443] [2023-03-31 00:11:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:23,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:11:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:23,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:11:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:23,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:11:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515395443] [2023-03-31 00:11:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515395443] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:11:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192348823] [2023-03-31 00:11:23,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:11:23,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:23,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:11:23,555 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 00:11:23,597 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 00:11:23,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:11:23,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:11:23,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 00:11:23,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:11:23,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 00:11:23,778 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 00:11:23,778 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 00:11:23,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:23,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:23,897 INFO L321 Elim1Store]: treesize reduction 18, result has 21.7 percent of original size [2023-03-31 00:11:23,897 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 35 treesize of output 36 [2023-03-31 00:11:23,904 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 12 treesize of output 11 [2023-03-31 00:11:23,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-03-31 00:11:23,916 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 12 treesize of output 11 [2023-03-31 00:11:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:24,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:11:24,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2023-03-31 00:11:24,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-03-31 00:11:24,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 49 [2023-03-31 00:11:24,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-03-31 00:11:24,137 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~a~0.offset 4)) (.cse2 (+ c_main_~p~0.offset 4))) (and (forall ((v_arrayElimArr_6 (Array Int Int)) (v_arrayElimArr_5 (Array Int Int))) (or (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_arrayElimArr_6))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_arrayElimArr_5) c_main_~a~0.base) .cse1)) (+ 4 (select (select .cse0 c_main_~a~0.base) .cse1)))) 0) (not (= (select v_arrayElimArr_6 .cse2) 0)) (not (= (select v_arrayElimArr_5 .cse2) 0)))) (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int))) (or (= (select (let ((.cse3 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_arrayElimArr_3))) (select .cse3 (select (select .cse3 c_main_~a~0.base) .cse1))) (+ (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_arrayElimArr_4) c_main_~a~0.base) .cse1) 4)) 0) (not (= (select v_arrayElimArr_4 .cse2) 0)) (not (= (select v_arrayElimArr_3 .cse2) 0)))))) is different from false [2023-03-31 00:11:24,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 61 [2023-03-31 00:11:24,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2023-03-31 00:11:24,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,221 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 72 treesize of output 71 [2023-03-31 00:11:24,472 INFO L321 Elim1Store]: treesize reduction 42, result has 82.1 percent of original size [2023-03-31 00:11:24,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 208 treesize of output 335 [2023-03-31 00:11:24,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,534 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 137 treesize of output 109 [2023-03-31 00:11:24,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:24,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 166 [2023-03-31 00:11:33,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:33,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 61 [2023-03-31 00:11:33,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:33,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2023-03-31 00:11:33,216 INFO L321 Elim1Store]: treesize reduction 84, result has 25.0 percent of original size [2023-03-31 00:11:33,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 111 [2023-03-31 00:11:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:11:33,232 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 43 treesize of output 37 [2023-03-31 00:11:33,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:11:33,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:11:33,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 67 [2023-03-31 00:11:33,263 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 00:11:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-03-31 00:11:33,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192348823] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:11:33,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:11:33,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-03-31 00:11:33,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770856642] [2023-03-31 00:11:33,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:11:33,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-31 00:11:33,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:11:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-31 00:11:33,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=230, Unknown=1, NotChecked=30, Total=306 [2023-03-31 00:11:33,487 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:11:33,807 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-03-31 00:11:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:11:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-03-31 00:11:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:11:33,808 INFO L225 Difference]: With dead ends: 42 [2023-03-31 00:11:33,808 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 00:11:33,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=449, Unknown=1, NotChecked=44, Total=600 [2023-03-31 00:11:33,809 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:11:33,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 45 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 150 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2023-03-31 00:11:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 00:11:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-03-31 00:11:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-03-31 00:11:33,814 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2023-03-31 00:11:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:11:33,814 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-03-31 00:11:33,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-03-31 00:11:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 00:11:33,815 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:11:33,815 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:11:33,824 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 00:11:34,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:34,025 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:11:34,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:11:34,025 INFO L85 PathProgramCache]: Analyzing trace with hash 830742551, now seen corresponding path program 3 times [2023-03-31 00:11:34,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:11:34,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827220884] [2023-03-31 00:11:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:11:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:34,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:11:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:34,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:11:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827220884] [2023-03-31 00:11:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827220884] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:11:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339829452] [2023-03-31 00:11:34,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:11:34,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:11:34,611 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 00:11:34,613 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 00:11:34,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 00:11:34,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:11:34,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 71 conjunts are in the unsatisfiable core [2023-03-31 00:11:34,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:11:34,758 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 00:11:34,790 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-03-31 00:11:34,791 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 00:11:34,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:34,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:34,851 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 00:11:34,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:34,864 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 00:11:34,879 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-03-31 00:11:34,880 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 00:11:34,949 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-03-31 00:11:34,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 69 [2023-03-31 00:11:34,958 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 27 treesize of output 22 [2023-03-31 00:11:34,971 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 31 treesize of output 26 [2023-03-31 00:11:35,037 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-03-31 00:11:35,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 77 [2023-03-31 00:11:35,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-03-31 00:11:35,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:11:35,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 41 [2023-03-31 00:11:35,056 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 16 treesize of output 15 [2023-03-31 00:11:35,108 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 00:11:35,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 40 [2023-03-31 00:11:35,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-03-31 00:11:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:35,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:11:35,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-03-31 00:11:35,156 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_348 (Array Int Int)) (v_arrayElimArr_11 (Array Int Int)) (v_ArrVal_352 (Array Int Int))) (or (not (= (select v_arrayElimArr_11 (+ c_main_~p~0.offset 4)) 0)) (= (let ((.cse0 (+ c_main_~a~0.offset 4))) (select (select (store |c_#memory_int| c_main_~p~0.base v_ArrVal_348) (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_352) c_main_~a~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_arrayElimArr_11) c_main_~a~0.base) .cse0))) 1))) is different from false [2023-03-31 00:11:35,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2023-03-31 00:11:35,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,269 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 64 treesize of output 70 [2023-03-31 00:11:35,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,279 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 128 treesize of output 131 [2023-03-31 00:11:35,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 97 [2023-03-31 00:11:35,293 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 27 [2023-03-31 00:11:35,329 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 00:11:35,341 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 00:11:35,353 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 30 treesize of output 22 [2023-03-31 00:11:35,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-03-31 00:11:35,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,464 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 86 treesize of output 85 [2023-03-31 00:11:35,469 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 70 treesize of output 62 [2023-03-31 00:11:35,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,480 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 72 treesize of output 56 [2023-03-31 00:11:35,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-03-31 00:11:35,568 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:11:35,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,574 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 47 treesize of output 46 [2023-03-31 00:11:35,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,581 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 41 treesize of output 33 [2023-03-31 00:11:35,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-03-31 00:11:35,633 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 00:11:35,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,639 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 36 treesize of output 35 [2023-03-31 00:11:35,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:35,645 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 20 treesize of output 20 [2023-03-31 00:11:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-03-31 00:11:35,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339829452] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:11:35,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:11:35,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2023-03-31 00:11:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674468949] [2023-03-31 00:11:35,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:11:35,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-03-31 00:11:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:11:35,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-03-31 00:11:35,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=384, Unknown=12, NotChecked=40, Total=506 [2023-03-31 00:11:35,856 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:11:36,634 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-03-31 00:11:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 00:11:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-03-31 00:11:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:11:36,635 INFO L225 Difference]: With dead ends: 42 [2023-03-31 00:11:36,635 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 00:11:36,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=860, Unknown=18, NotChecked=62, Total=1122 [2023-03-31 00:11:36,636 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:11:36,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 56 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 299 Invalid, 2 Unknown, 35 Unchecked, 0.4s Time] [2023-03-31 00:11:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 00:11:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-03-31 00:11:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-03-31 00:11:36,643 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2023-03-31 00:11:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:11:36,643 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-03-31 00:11:36,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:11:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-03-31 00:11:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 00:11:36,643 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:11:36,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:11:36,651 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 00:11:36,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:36,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:11:36,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:11:36,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1054646226, now seen corresponding path program 4 times [2023-03-31 00:11:36,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:11:36,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184033751] [2023-03-31 00:11:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:11:36,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:11:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:11:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:11:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:37,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:11:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184033751] [2023-03-31 00:11:37,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184033751] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:11:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631163197] [2023-03-31 00:11:37,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:11:37,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:11:37,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:11:37,541 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 00:11:37,543 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 00:11:37,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:11:37,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:11:37,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 61 conjunts are in the unsatisfiable core [2023-03-31 00:11:37,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:11:37,663 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 00:11:37,688 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-03-31 00:11:37,689 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 00:11:37,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:37,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 00:11:37,769 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-03-31 00:11:37,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-03-31 00:11:37,781 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-03-31 00:11:37,782 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 20 treesize of output 22 [2023-03-31 00:11:37,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 00:11:37,788 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 14 treesize of output 16 [2023-03-31 00:11:37,827 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-03-31 00:11:37,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2023-03-31 00:11:37,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2023-03-31 00:11:37,894 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-03-31 00:11:37,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 134 [2023-03-31 00:11:37,909 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-03-31 00:11:37,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 123 [2023-03-31 00:11:37,913 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 72 treesize of output 73 [2023-03-31 00:11:38,028 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-03-31 00:11:38,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 49 [2023-03-31 00:11:38,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-03-31 00:11:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:11:38,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:11:38,084 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 1028 treesize of output 912 [2023-03-31 00:11:38,104 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~a~0.offset 4))) (and (forall ((v_ArrVal_452 (Array Int Int)) (v_ArrVal_454 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_452))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_454) c_main_~a~0.base) .cse1)) (+ (select (select .cse0 c_main_~a~0.base) .cse1) 4))) c_main_~p~0.offset)) (forall ((v_ArrVal_452 (Array Int Int)) (v_ArrVal_454 (Array Int Int))) (= c_main_~p~0.base (select (let ((.cse2 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_454))) (select .cse2 (select (select .cse2 c_main_~a~0.base) .cse1))) (+ (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_452) c_main_~a~0.base) .cse1) 4)))) (forall ((v_ArrVal_452 (Array Int Int)) (v_ArrVal_454 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_452)) (.cse3 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_454))) (let ((.cse4 (select (select .cse3 c_main_~a~0.base) .cse1)) (.cse5 (+ (select (select .cse6 c_main_~a~0.base) .cse1) 4))) (or (not (= c_main_~p~0.base (select (select .cse3 .cse4) .cse5))) (not (= (select (select .cse6 .cse4) .cse5) (+ c_main_~p~0.offset 4))))))))) is different from false [2023-03-31 00:11:38,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:38,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 103 [2023-03-31 00:11:38,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:38,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 137 [2023-03-31 00:11:38,658 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 13 treesize of output 1 [2023-03-31 00:11:38,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:38,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 86 [2023-03-31 00:11:38,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:38,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 66 [2023-03-31 00:11:38,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:38,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 2718 treesize of output 1887 [2023-03-31 00:11:38,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:38,858 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 5316 treesize of output 4961 [2023-03-31 00:11:39,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:39,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 640 treesize of output 640 [2023-03-31 00:11:39,063 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 800 treesize of output 704 [2023-03-31 00:11:39,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:39,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 526 treesize of output 514 [2023-03-31 00:11:39,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:11:39,192 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 670 treesize of output 530