/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:14:47,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:14:47,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:14:47,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:14:47,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:14:47,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:14:47,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:14:47,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:14:47,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:14:47,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:14:47,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:14:47,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:14:47,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:14:47,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:14:47,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:14:47,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:14:47,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:14:47,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:14:47,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:14:47,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:14:47,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:14:47,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:14:47,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:14:47,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:14:47,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:14:47,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:14:47,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:14:47,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:14:47,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:14:47,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:14:47,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:14:47,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:14:47,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:14:47,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:14:47,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:14:47,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:14:47,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:14:47,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:14:47,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:14:47,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:14:47,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:14:47,315 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 [2023-04-02 01:14:47,340 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:14:47,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:14:47,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:14:47,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:14:47,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:14:47,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:14:47,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:14:47,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:14:47,343 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:14:47,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:14:47,344 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:14:47,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:14:47,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:14:47,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:14:47,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:14:47,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:14:47,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:14:47,344 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:14:47,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:14:47,345 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:14:47,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:14:47,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:14:47,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:14:47,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:14:47,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:14:47,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:14:47,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:14:47,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:14:47,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:14:47,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:14:47,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:14:47,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:14:47,346 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:14:47,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:14:47,347 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:14:47,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:14:47,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:14:47,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:14:47,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:14:47,582 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:14:47,582 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:14:47,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-04-02 01:14:48,810 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:14:49,040 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:14:49,041 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-04-02 01:14:49,051 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9844b33/6ab3ad8bda80492eb5724628bafcbea7/FLAG2813c5397 [2023-04-02 01:14:49,064 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9844b33/6ab3ad8bda80492eb5724628bafcbea7 [2023-04-02 01:14:49,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:14:49,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:14:49,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:14:49,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:14:49,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:14:49,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c99f889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49, skipping insertion in model container [2023-04-02 01:14:49,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:14:49,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:14:49,392 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2023-04-02 01:14:49,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:14:49,410 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:14:49,477 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2023-04-02 01:14:49,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:14:49,505 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:14:49,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49 WrapperNode [2023-04-02 01:14:49,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:14:49,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:14:49,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:14:49,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:14:49,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:14:49,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:14:49,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:14:49,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:14:49,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (1/1) ... [2023-04-02 01:14:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:14:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:14:49,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 01:14:49,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 01:14:49,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:14:49,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:14:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:14:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 01:14:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 01:14:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-02 01:14:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2023-04-02 01:14:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create_with_sublist [2023-04-02 01:14:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2023-04-02 01:14:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2023-04-02 01:14:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_hierarchical_destroy [2023-04-02 01:14:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:14:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 01:14:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 01:14:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 01:14:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 01:14:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 01:14:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 01:14:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 01:14:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 01:14:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 01:14:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 01:14:49,659 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 01:14:49,659 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 01:14:49,659 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 01:14:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 01:14:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 01:14:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 01:14:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 01:14:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 01:14:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 01:14:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 01:14:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 01:14:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 01:14:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 01:14:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 01:14:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 01:14:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 01:14:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 01:14:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 01:14:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 01:14:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 01:14:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 01:14:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 01:14:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 01:14:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 01:14:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 01:14:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 01:14:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 01:14:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 01:14:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 01:14:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 01:14:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 01:14:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 01:14:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 01:14:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 01:14:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 01:14:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 01:14:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 01:14:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 01:14:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 01:14:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 01:14:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 01:14:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 01:14:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 01:14:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 01:14:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 01:14:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 01:14:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 01:14:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 01:14:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 01:14:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 01:14:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 01:14:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 01:14:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 01:14:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 01:14:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 01:14:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 01:14:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 01:14:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-02 01:14:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2023-04-02 01:14:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 01:14:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 01:14:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure node_create_with_sublist [2023-04-02 01:14:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2023-04-02 01:14:49,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 01:14:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2023-04-02 01:14:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure sll_hierarchical_destroy [2023-04-02 01:14:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:14:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:14:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 01:14:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-02 01:14:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:14:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:14:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:14:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:14:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:14:49,924 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:14:49,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:14:49,961 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-02 01:14:50,185 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:14:50,192 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:14:50,192 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-02 01:14:50,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:14:50 BoogieIcfgContainer [2023-04-02 01:14:50,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:14:50,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:14:50,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:14:50,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:14:50,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:14:49" (1/3) ... [2023-04-02 01:14:50,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deb118b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:14:50, skipping insertion in model container [2023-04-02 01:14:50,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:14:49" (2/3) ... [2023-04-02 01:14:50,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deb118b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:14:50, skipping insertion in model container [2023-04-02 01:14:50,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:14:50" (3/3) ... [2023-04-02 01:14:50,201 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2023-04-02 01:14:50,218 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:14:50,218 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:14:50,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:14:50,283 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;@2919c9fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:14:50,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:14:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 53 states have internal predecessors, (78), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 01:14:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:14:50,297 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:50,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:50,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:50,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1211826909, now seen corresponding path program 1 times [2023-04-02 01:14:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702258148] [2023-04-02 01:14:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:50,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:14:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:50,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:50,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:14:50,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:50,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702258148] [2023-04-02 01:14:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702258148] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:14:50,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:14:50,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:14:50,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574121594] [2023-04-02 01:14:50,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:14:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:14:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:50,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:14:50,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:14:50,769 INFO L87 Difference]: Start difference. First operand has 70 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 53 states have internal predecessors, (78), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:14:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:51,039 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2023-04-02 01:14:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:14:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-04-02 01:14:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:51,048 INFO L225 Difference]: With dead ends: 143 [2023-04-02 01:14:51,048 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 01:14:51,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:14:51,054 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:51,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 7 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:14:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 01:14:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-04-02 01:14:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 01:14:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2023-04-02 01:14:51,094 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 29 [2023-04-02 01:14:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:51,094 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2023-04-02 01:14:51,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:14:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2023-04-02 01:14:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:14:51,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:51,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:51,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:14:51,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:51,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:51,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2122579433, now seen corresponding path program 1 times [2023-04-02 01:14:51,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:51,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906800312] [2023-04-02 01:14:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:51,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:14:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:14:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906800312] [2023-04-02 01:14:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906800312] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:14:51,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:14:51,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:14:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797704294] [2023-04-02 01:14:51,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:14:51,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:14:51,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:14:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:14:51,322 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:14:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:51,556 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2023-04-02 01:14:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:14:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-04-02 01:14:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:51,558 INFO L225 Difference]: With dead ends: 104 [2023-04-02 01:14:51,558 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 01:14:51,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:14:51,559 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 85 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:51,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 5 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:14:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 01:14:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2023-04-02 01:14:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 01:14:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2023-04-02 01:14:51,571 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 29 [2023-04-02 01:14:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:51,572 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2023-04-02 01:14:51,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:14:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2023-04-02 01:14:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 01:14:51,573 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:51,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:51,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:14:51,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:51,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1560794727, now seen corresponding path program 1 times [2023-04-02 01:14:51,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:51,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531217706] [2023-04-02 01:14:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:51,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:14:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:14:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:51,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531217706] [2023-04-02 01:14:51,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531217706] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:14:51,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:14:51,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:14:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627815275] [2023-04-02 01:14:51,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:14:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:14:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:51,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:14:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:14:51,709 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:14:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:51,951 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2023-04-02 01:14:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:14:51,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-04-02 01:14:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:51,954 INFO L225 Difference]: With dead ends: 77 [2023-04-02 01:14:51,954 INFO L226 Difference]: Without dead ends: 75 [2023-04-02 01:14:51,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:14:51,955 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 137 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:51,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 7 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:14:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-04-02 01:14:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2023-04-02 01:14:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 01:14:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2023-04-02 01:14:51,967 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 34 [2023-04-02 01:14:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:51,968 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2023-04-02 01:14:51,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:14:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2023-04-02 01:14:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 01:14:51,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:51,969 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:51,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 01:14:51,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:51,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1288940196, now seen corresponding path program 1 times [2023-04-02 01:14:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:51,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403001422] [2023-04-02 01:14:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:14:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:14:52,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:52,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403001422] [2023-04-02 01:14:52,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403001422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:14:52,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:14:52,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:14:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612574681] [2023-04-02 01:14:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:14:52,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:14:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:14:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:14:52,066 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:14:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:52,246 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2023-04-02 01:14:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:14:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2023-04-02 01:14:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:52,248 INFO L225 Difference]: With dead ends: 79 [2023-04-02 01:14:52,248 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 01:14:52,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:14:52,250 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:52,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 5 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:14:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 01:14:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2023-04-02 01:14:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 01:14:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-04-02 01:14:52,261 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 38 [2023-04-02 01:14:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:52,261 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-04-02 01:14:52,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:14:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-04-02 01:14:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:14:52,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:52,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:52,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 01:14:52,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:52,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 375895733, now seen corresponding path program 1 times [2023-04-02 01:14:52,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:52,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302986329] [2023-04-02 01:14:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:52,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:14:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-02 01:14:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:14:52,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302986329] [2023-04-02 01:14:52,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302986329] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:14:52,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682356397] [2023-04-02 01:14:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:52,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:14:52,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:14:52,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:14:52,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:14:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:52,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:14:52,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:14:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:14:52,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:14:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:14:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682356397] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:14:52,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:14:52,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-04-02 01:14:52,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707344551] [2023-04-02 01:14:52,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:14:52,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 01:14:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:52,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 01:14:52,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:14:52,807 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 01:14:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:53,051 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2023-04-02 01:14:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:14:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 45 [2023-04-02 01:14:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:53,054 INFO L225 Difference]: With dead ends: 124 [2023-04-02 01:14:53,054 INFO L226 Difference]: Without dead ends: 81 [2023-04-02 01:14:53,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:14:53,056 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 124 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:53,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 7 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:14:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-02 01:14:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2023-04-02 01:14:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.280701754385965) internal successors, (73), 57 states have internal predecessors, (73), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 01:14:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2023-04-02 01:14:53,093 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 45 [2023-04-02 01:14:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:53,094 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2023-04-02 01:14:53,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 01:14:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2023-04-02 01:14:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:14:53,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:53,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:53,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:14:53,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:14:53,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:53,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:53,307 INFO L85 PathProgramCache]: Analyzing trace with hash 710121461, now seen corresponding path program 2 times [2023-04-02 01:14:53,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:53,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738279615] [2023-04-02 01:14:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:53,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:53,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:53,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:14:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:53,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:53,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:53,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-04-02 01:14:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:14:53,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:53,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738279615] [2023-04-02 01:14:53,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738279615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:14:53,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:14:53,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-02 01:14:53,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720277999] [2023-04-02 01:14:53,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:14:53,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 01:14:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 01:14:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:14:53,622 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:14:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:54,027 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2023-04-02 01:14:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:14:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 55 [2023-04-02 01:14:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:54,028 INFO L225 Difference]: With dead ends: 109 [2023-04-02 01:14:54,028 INFO L226 Difference]: Without dead ends: 88 [2023-04-02 01:14:54,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:14:54,030 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 126 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:54,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 17 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:14:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-02 01:14:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-04-02 01:14:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 69 states have internal predecessors, (87), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2023-04-02 01:14:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2023-04-02 01:14:54,046 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 55 [2023-04-02 01:14:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:54,046 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2023-04-02 01:14:54,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:14:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2023-04-02 01:14:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 01:14:54,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:54,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:54,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 01:14:54,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:54,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1672859668, now seen corresponding path program 1 times [2023-04-02 01:14:54,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:54,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181640306] [2023-04-02 01:14:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:54,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:54,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:14:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:54,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:54,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:54,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-02 01:14:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:14:54,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181640306] [2023-04-02 01:14:54,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181640306] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:14:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661836603] [2023-04-02 01:14:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:54,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:14:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:14:54,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:14:54,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:14:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:54,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 01:14:54,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:14:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:14:54,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:14:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:14:55,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661836603] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:14:55,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:14:55,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2023-04-02 01:14:55,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591716114] [2023-04-02 01:14:55,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:14:55,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 01:14:55,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:55,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 01:14:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-04-02 01:14:55,124 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 20 states, 17 states have (on average 3.764705882352941) internal successors, (64), 18 states have internal predecessors, (64), 10 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-02 01:14:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:55,619 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2023-04-02 01:14:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 01:14:55,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.764705882352941) internal successors, (64), 18 states have internal predecessors, (64), 10 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 58 [2023-04-02 01:14:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:55,623 INFO L225 Difference]: With dead ends: 125 [2023-04-02 01:14:55,623 INFO L226 Difference]: Without dead ends: 104 [2023-04-02 01:14:55,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 01:14:55,625 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 173 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:55,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 15 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:14:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-02 01:14:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2023-04-02 01:14:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 72 states have internal predecessors, (91), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2023-04-02 01:14:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2023-04-02 01:14:55,646 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 58 [2023-04-02 01:14:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:55,648 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2023-04-02 01:14:55,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.764705882352941) internal successors, (64), 18 states have internal predecessors, (64), 10 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-02 01:14:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2023-04-02 01:14:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 01:14:55,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:55,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:55,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:14:55,860 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,SelfDestructingSolverStorable6 [2023-04-02 01:14:55,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:55,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:55,861 INFO L85 PathProgramCache]: Analyzing trace with hash 815181717, now seen corresponding path program 2 times [2023-04-02 01:14:55,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:55,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447411799] [2023-04-02 01:14:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:55,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:55,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:56,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:14:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:56,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:56,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:56,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-04-02 01:14:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:14:56,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447411799] [2023-04-02 01:14:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447411799] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:14:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789009794] [2023-04-02 01:14:56,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:14:56,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:14:56,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:14:56,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:14:56,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:14:56,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:14:56,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:14:56,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 01:14:56,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:14:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:14:56,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:14:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:14:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789009794] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:14:56,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:14:56,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 21 [2023-04-02 01:14:56,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449583502] [2023-04-02 01:14:56,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:14:56,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 01:14:56,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:56,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 01:14:56,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:14:56,884 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand has 21 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 9 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-02 01:14:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:57,495 INFO L93 Difference]: Finished difference Result 131 states and 166 transitions. [2023-04-02 01:14:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:14:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 9 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2023-04-02 01:14:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:57,497 INFO L225 Difference]: With dead ends: 131 [2023-04-02 01:14:57,497 INFO L226 Difference]: Without dead ends: 110 [2023-04-02 01:14:57,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 01:14:57,498 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 150 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:57,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 19 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:14:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-02 01:14:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2023-04-02 01:14:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 75 states have internal predecessors, (95), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2023-04-02 01:14:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2023-04-02 01:14:57,509 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 61 [2023-04-02 01:14:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:57,509 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2023-04-02 01:14:57,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 9 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-02 01:14:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2023-04-02 01:14:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 01:14:57,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:57,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:57,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:14:57,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:14:57,718 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:57,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash 491787380, now seen corresponding path program 3 times [2023-04-02 01:14:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:57,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762597106] [2023-04-02 01:14:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:57,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:58,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:58,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:14:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:58,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:14:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:59,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:14:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:59,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-02 01:14:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 01:14:59,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:59,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762597106] [2023-04-02 01:14:59,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762597106] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:14:59,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:14:59,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-02 01:14:59,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576652226] [2023-04-02 01:14:59,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:14:59,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 01:14:59,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 01:14:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2023-04-02 01:14:59,210 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:15:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:15:00,641 INFO L93 Difference]: Finished difference Result 204 states and 298 transitions. [2023-04-02 01:15:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:15:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 64 [2023-04-02 01:15:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:15:00,645 INFO L225 Difference]: With dead ends: 204 [2023-04-02 01:15:00,645 INFO L226 Difference]: Without dead ends: 184 [2023-04-02 01:15:00,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:15:00,649 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 151 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:15:00,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 21 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 01:15:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-02 01:15:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 127. [2023-04-02 01:15:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 105 states have (on average 1.3142857142857143) internal successors, (138), 108 states have internal predecessors, (138), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (21), 12 states have call predecessors, (21), 10 states have call successors, (21) [2023-04-02 01:15:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2023-04-02 01:15:00,685 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 64 [2023-04-02 01:15:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:15:00,685 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2023-04-02 01:15:00,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:15:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2023-04-02 01:15:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 01:15:00,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:15:00,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:15:00,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 01:15:00,687 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:15:00,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:15:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash 694244855, now seen corresponding path program 1 times [2023-04-02 01:15:00,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:15:00,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678341059] [2023-04-02 01:15:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:15:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:15:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:02,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:15:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:02,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:15:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:02,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:15:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:03,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:15:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:03,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-02 01:15:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:15:03,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:15:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678341059] [2023-04-02 01:15:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678341059] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:15:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975028915] [2023-04-02 01:15:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:15:03,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:15:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:15:03,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:15:03,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:15:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:04,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 119 conjunts are in the unsatisfiable core [2023-04-02 01:15:04,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:15:04,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:15:04,320 WARN L861 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (= (select |c_old(#valid)| sll_create_~new_head~0.base) 0) (exists ((v_ArrVal_1063 Int)) (= |c_#valid| (store |c_old(#valid)| sll_create_~new_head~0.base v_ArrVal_1063))))) is different from true [2023-04-02 01:15:04,348 WARN L861 $PredicateComparison]: unable to prove that (and (not (= c_sll_create_~new_head~0.base 0)) (exists ((v_ArrVal_1063 Int) (v_sll_create_~new_head~0.base_29 Int)) (and (= |c_#valid| (store (store |c_old(#valid)| v_sll_create_~new_head~0.base_29 v_ArrVal_1063) c_sll_create_~new_head~0.base 1)) (= (select |c_old(#valid)| v_sll_create_~new_head~0.base_29) 0)))) is different from true [2023-04-02 01:15:04,365 WARN L861 $PredicateComparison]: unable to prove that (and (not (= c_sll_create_~head~0.base 0)) (exists ((v_ArrVal_1063 Int) (v_sll_create_~new_head~0.base_29 Int)) (and (= |c_#valid| (store (store |c_old(#valid)| v_sll_create_~new_head~0.base_29 v_ArrVal_1063) c_sll_create_~head~0.base 1)) (= (select |c_old(#valid)| v_sll_create_~new_head~0.base_29) 0)))) is different from true [2023-04-02 01:15:04,457 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 [2023-04-02 01:15:04,737 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-04-02 01:15:04,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2023-04-02 01:15:04,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:15:04,961 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-04-02 01:15:04,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2023-04-02 01:15:04,981 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 [2023-04-02 01:15:05,138 INFO L321 Elim1Store]: treesize reduction 56, result has 45.1 percent of original size [2023-04-02 01:15:05,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 77 [2023-04-02 01:15:05,288 INFO L321 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2023-04-02 01:15:05,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2023-04-02 01:15:05,595 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-04-02 01:15:05,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 388 treesize of output 385 [2023-04-02 01:15:05,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:15:05,877 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 30 treesize of output 10 [2023-04-02 01:15:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 11 not checked. [2023-04-02 01:15:06,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:15:07,198 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 01:15:07,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 01:15:07,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127685 treesize of output 122821 [2023-04-02 01:15:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975028915] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:15:08,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:15:08,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2023-04-02 01:15:08,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066045462] [2023-04-02 01:15:08,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:15:08,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-02 01:15:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:15:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-02 01:15:08,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2313, Unknown=3, NotChecked=294, Total=2756 [2023-04-02 01:15:08,255 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 46 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 37 states have internal predecessors, (81), 7 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-02 01:15:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:15:14,454 INFO L93 Difference]: Finished difference Result 384 states and 605 transitions. [2023-04-02 01:15:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-02 01:15:14,454 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 37 states have internal predecessors, (81), 7 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2023-04-02 01:15:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:15:14,457 INFO L225 Difference]: With dead ends: 384 [2023-04-02 01:15:14,457 INFO L226 Difference]: Without dead ends: 348 [2023-04-02 01:15:14,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=569, Invalid=9142, Unknown=3, NotChecked=588, Total=10302 [2023-04-02 01:15:14,462 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 434 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4967 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1044 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:15:14,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 21 Invalid, 6101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4967 Invalid, 0 Unknown, 1044 Unchecked, 3.5s Time] [2023-04-02 01:15:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-04-02 01:15:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 263. [2023-04-02 01:15:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 222 states have (on average 1.3243243243243243) internal successors, (294), 226 states have internal predecessors, (294), 20 states have call successors, (20), 7 states have call predecessors, (20), 20 states have return successors, (64), 29 states have call predecessors, (64), 19 states have call successors, (64) [2023-04-02 01:15:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 378 transitions. [2023-04-02 01:15:14,513 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 378 transitions. Word has length 65 [2023-04-02 01:15:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:15:14,513 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 378 transitions. [2023-04-02 01:15:14,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 37 states have internal predecessors, (81), 7 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-02 01:15:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 378 transitions. [2023-04-02 01:15:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 01:15:14,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:15:14,515 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:15:14,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 01:15:14,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:15:14,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:15:14,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:15:14,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1619508012, now seen corresponding path program 2 times [2023-04-02 01:15:14,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:15:14,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605813560] [2023-04-02 01:15:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:15:14,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:15:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:16,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:15:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:16,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:15:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:17,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-04-02 01:15:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:15:18,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 01:15:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat