/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:55:19,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:55:19,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:55:19,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:55:19,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:55:19,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:55:19,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:55:19,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:55:19,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:55:19,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:55:19,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:55:19,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:55:19,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:55:19,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:55:19,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:55:19,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:55:19,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:55:19,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:55:19,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:55:19,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:55:19,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:55:19,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:55:19,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:55:19,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:55:19,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:55:19,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:55:19,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:55:19,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:55:19,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:55:19,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:55:19,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:55:19,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:55:19,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:55:19,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:55:19,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:55:19,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:55:19,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:55:19,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:55:19,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:55:19,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:55:19,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:55:19,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 21:55:19,275 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:55:19,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:55:19,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:55:19,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:55:19,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:55:19,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:55:19,277 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:55:19,277 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:55:19,277 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:55:19,277 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:55:19,278 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:55:19,278 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:55:19,278 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:55:19,278 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:55:19,278 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:55:19,278 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:55:19,278 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:55:19,279 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:55:19,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:55:19,279 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:55:19,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:55:19,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:55:19,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:55:19,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:55:19,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:55:19,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:55:19,280 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:55:19,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:55:19,281 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:55:19,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:55:19,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:55:19,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:55:19,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:55:19,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:55:19,281 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:55:19,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:55:19,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:55:19,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:55:19,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:55:19,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:55:19,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:55:19,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:55:19,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:55:19,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:55:19,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:55:19,530 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:55:19,531 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:55:19,532 INFO L432 ainManager$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 21:55:20,650 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:55:20,897 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:55:20,897 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 21:55:20,914 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb8a668e/29c02066ab00494aa05ce2b05c35d4b2/FLAGe7cf1d6b2 [2023-04-02 21:55:20,926 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb8a668e/29c02066ab00494aa05ce2b05c35d4b2 [2023-04-02 21:55:20,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:55:20,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:55:20,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:55:20,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:55:20,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:55:20,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:55:20" (1/1) ... [2023-04-02 21:55:20,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488a6be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:20, skipping insertion in model container [2023-04-02 21:55:20,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:55:20" (1/1) ... [2023-04-02 21:55:20,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:55:20,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:55:21,302 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 21:55:21,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:55:21,321 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:55:21,362 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 21:55:21,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:55:21,385 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:55:21,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21 WrapperNode [2023-04-02 21:55:21,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:55:21,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:55:21,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:55:21,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:55:21,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:55:21,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:55:21,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:55:21,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:55:21,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (1/1) ... [2023-04-02 21:55:21,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:55:21,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:21,487 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 21:55:21,488 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 21:55:21,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:55:21,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:55:21,522 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:55:21,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 21:55:21,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 21:55:21,522 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-02 21:55:21,523 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2023-04-02 21:55:21,523 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create_with_sublist [2023-04-02 21:55:21,523 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2023-04-02 21:55:21,523 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2023-04-02 21:55:21,523 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_hierarchical_destroy [2023-04-02 21:55:21,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:55:21,523 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:55:21,523 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:55:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 21:55:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 21:55:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:55:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:55:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:55:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 21:55:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 21:55:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 21:55:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 21:55:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 21:55:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 21:55:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 21:55:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 21:55:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 21:55:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 21:55:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 21:55:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 21:55:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 21:55:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 21:55:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 21:55:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 21:55:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 21:55:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 21:55:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 21:55:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 21:55:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 21:55:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 21:55:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 21:55:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 21:55:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 21:55:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 21:55:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 21:55:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 21:55:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 21:55:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 21:55:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 21:55:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 21:55:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 21:55:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 21:55:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 21:55:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2023-04-02 21:55:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure node_create_with_sublist [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure sll_hierarchical_destroy [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:55:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:55:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:55:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:55:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:55:21,838 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:55:21,839 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:55:21,864 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-02 21:55:22,055 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:55:22,097 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:55:22,097 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-02 21:55:22,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:55:22 BoogieIcfgContainer [2023-04-02 21:55:22,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:55:22,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:55:22,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:55:22,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:55:22,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:55:20" (1/3) ... [2023-04-02 21:55:22,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b207a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:55:22, skipping insertion in model container [2023-04-02 21:55:22,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:21" (2/3) ... [2023-04-02 21:55:22,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b207a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:55:22, skipping insertion in model container [2023-04-02 21:55:22,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:55:22" (3/3) ... [2023-04-02 21:55:22,107 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2023-04-02 21:55:22,143 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:55:22,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:55:22,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:55:22,212 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7205402d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:55:22,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:55:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 43 states have internal predecessors, (60), 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 21:55:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 21:55:22,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:22,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:55:22,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:22,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash -152340752, now seen corresponding path program 1 times [2023-04-02 21:55:22,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:22,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336205123] [2023-04-02 21:55:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:22,626 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 21:55:22,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:22,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336205123] [2023-04-02 21:55:22,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336205123] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:55:22,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:55:22,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:55:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059911291] [2023-04-02 21:55:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:55:22,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:55:22,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:55:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:55:22,665 INFO L87 Difference]: Start difference. First operand has 60 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 43 states have internal predecessors, (60), 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 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 1 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 21:55:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:22,751 INFO L93 Difference]: Finished difference Result 121 states and 164 transitions. [2023-04-02 21:55:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:55:22,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 1 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 25 [2023-04-02 21:55:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:22,761 INFO L225 Difference]: With dead ends: 121 [2023-04-02 21:55:22,761 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 21:55:22,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:55:22,770 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 5 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:22,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 114 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:55:22,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 21:55:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-04-02 21:55:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 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 21:55:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-04-02 21:55:22,810 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 25 [2023-04-02 21:55:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:22,811 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-04-02 21:55:22,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 1 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 21:55:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-04-02 21:55:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 21:55:22,813 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:22,813 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 21:55:22,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:55:22,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:22,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1204325652, now seen corresponding path program 1 times [2023-04-02 21:55:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:22,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473838880] [2023-04-02 21:55:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:22,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:22,974 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 21:55:22,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:22,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473838880] [2023-04-02 21:55:22,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473838880] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:55:22,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:55:22,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 21:55:22,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954970432] [2023-04-02 21:55:22,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:55:22,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 21:55:22,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:22,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 21:55:22,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 21:55:22,977 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 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 21:55:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:23,091 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2023-04-02 21:55:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:55:23,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 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 21:55:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:23,094 INFO L225 Difference]: With dead ends: 65 [2023-04-02 21:55:23,094 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 21:55:23,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:55:23,095 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:23,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 96 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:55:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 21:55:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2023-04-02 21:55:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 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 21:55:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-04-02 21:55:23,110 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2023-04-02 21:55:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:23,111 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-04-02 21:55:23,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 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 21:55:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-04-02 21:55:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 21:55:23,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:23,112 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] [2023-04-02 21:55:23,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 21:55:23,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:23,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:23,113 INFO L85 PathProgramCache]: Analyzing trace with hash 535447959, now seen corresponding path program 1 times [2023-04-02 21:55:23,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508622779] [2023-04-02 21:55:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:23,176 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 21:55:23,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:23,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508622779] [2023-04-02 21:55:23,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508622779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:55:23,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:55:23,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:55:23,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241242766] [2023-04-02 21:55:23,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:55:23,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:55:23,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:55:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:55:23,179 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (5), 1 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 21:55:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:23,209 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2023-04-02 21:55:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:55:23,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (5), 1 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 33 [2023-04-02 21:55:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:23,212 INFO L225 Difference]: With dead ends: 66 [2023-04-02 21:55:23,212 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 21:55:23,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:55:23,213 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:23,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 85 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:55:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 21:55:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-04-02 21:55:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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 21:55:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2023-04-02 21:55:23,222 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 33 [2023-04-02 21:55:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:23,222 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2023-04-02 21:55:23,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (5), 1 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 21:55:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2023-04-02 21:55:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 21:55:23,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:23,226 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] [2023-04-02 21:55:23,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 21:55:23,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:23,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash -862520129, now seen corresponding path program 1 times [2023-04-02 21:55:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:23,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919558326] [2023-04-02 21:55:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:23,396 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 21:55:23,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919558326] [2023-04-02 21:55:23,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919558326] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:23,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679444607] [2023-04-02 21:55:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:23,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:23,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:23,400 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 21:55:23,423 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 21:55:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:23,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 21:55:23,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:23,651 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 21:55:23,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:55:23,719 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 21:55:23,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679444607] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:55:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943756756] [2023-04-02 21:55:23,740 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-02 21:55:23,740 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:55:23,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:55:23,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:55:23,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:55:23,834 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:55:24,403 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 57 for LOIs [2023-04-02 21:55:24,561 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 57 for LOIs [2023-04-02 21:55:24,737 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 72 for LOIs [2023-04-02 21:55:24,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:55:24,781 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:55:25,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1943756756] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:55:25,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:55:25,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [4, 4, 4] total 22 [2023-04-02 21:55:25,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833185187] [2023-04-02 21:55:25,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:55:25,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 21:55:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 21:55:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-04-02 21:55:25,548 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 17 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 21:55:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:28,320 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2023-04-02 21:55:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 21:55:28,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 38 [2023-04-02 21:55:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:28,323 INFO L225 Difference]: With dead ends: 122 [2023-04-02 21:55:28,323 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 21:55:28,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 21:55:28,325 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 139 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:28,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 8 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 763 Invalid, 1 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 21:55:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 21:55:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2023-04-02 21:55:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 48 states have internal predecessors, (61), 10 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-02 21:55:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-04-02 21:55:28,359 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 38 [2023-04-02 21:55:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:28,359 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-04-02 21:55:28,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 21:55:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-04-02 21:55:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 21:55:28,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:28,365 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] [2023-04-02 21:55:28,377 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 21:55:28,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:28,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:28,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766020, now seen corresponding path program 1 times [2023-04-02 21:55:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74597554] [2023-04-02 21:55:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:55:28,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:28,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74597554] [2023-04-02 21:55:28,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74597554] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:28,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588739718] [2023-04-02 21:55:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:28,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:28,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:28,647 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 21:55:28,673 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 21:55:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:28,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 21:55:28,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:55:28,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:55:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:55:28,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588739718] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:55:28,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582400837] [2023-04-02 21:55:28,888 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-02 21:55:28,888 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:55:28,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:55:28,889 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:55:28,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:55:28,903 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:55:29,370 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 40 for LOIs [2023-04-02 21:55:29,379 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 57 for LOIs [2023-04-02 21:55:29,499 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 57 for LOIs [2023-04-02 21:55:29,603 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 72 for LOIs [2023-04-02 21:55:29,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:55:29,733 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:55:33,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1471#(and (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |main_~#head~1.base|) (= main_~i~0 3) (= main_~count~0 0) (= main_~j~0 0) (= |main_~#head~1.offset| 0) (= 5 main_~max~0) (= |#NULL.offset| 0) (= main_~min~0 3) (= |#NULL.base| 0))' at error location [2023-04-02 21:55:33,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:55:33,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:55:33,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 21:55:33,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827635937] [2023-04-02 21:55:33,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:55:33,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:55:33,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:55:33,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 21:55:33,564 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 21:55:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:33,655 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2023-04-02 21:55:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:55:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 41 [2023-04-02 21:55:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:33,657 INFO L225 Difference]: With dead ends: 138 [2023-04-02 21:55:33,657 INFO L226 Difference]: Without dead ends: 90 [2023-04-02 21:55:33,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 21:55:33,659 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:33,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 177 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:55:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-02 21:55:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2023-04-02 21:55:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 67 states have internal predecessors, (84), 12 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 21:55:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2023-04-02 21:55:33,692 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 41 [2023-04-02 21:55:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:33,692 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2023-04-02 21:55:33,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 21:55:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2023-04-02 21:55:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 21:55:33,693 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:33,693 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 21:55:33,701 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 21:55:33,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:33,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:33,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:33,895 INFO L85 PathProgramCache]: Analyzing trace with hash -3590860, now seen corresponding path program 2 times [2023-04-02 21:55:33,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:33,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14113104] [2023-04-02 21:55:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:33,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 21:55:34,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:34,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14113104] [2023-04-02 21:55:34,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14113104] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:34,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556473844] [2023-04-02 21:55:34,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:55:34,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:34,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:34,097 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 21:55:34,100 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 21:55:34,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 21:55:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:55:34,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 21:55:34,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 21:55:34,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:55:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 21:55:34,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556473844] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:55:34,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307605325] [2023-04-02 21:55:34,641 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-02 21:55:34,641 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:55:34,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:55:34,642 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:55:34,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:55:34,655 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:55:35,077 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 40 for LOIs [2023-04-02 21:55:35,088 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 57 for LOIs [2023-04-02 21:55:35,191 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 57 for LOIs [2023-04-02 21:55:35,306 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 72 for LOIs [2023-04-02 21:55:35,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:55:35,412 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:55:41,774 WARN L223 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:55:42,352 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2145#(and (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |main_~#head~1.base|) (= main_~i~0 3) (= main_~count~0 0) (= main_~j~0 0) (= |main_~#head~1.offset| 0) (= 5 main_~max~0) (= |#NULL.offset| 0) (= main_~min~0 3) (= |#NULL.base| 0))' at error location [2023-04-02 21:55:42,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:55:42,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:55:42,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2023-04-02 21:55:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784607090] [2023-04-02 21:55:42,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:55:42,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 21:55:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 21:55:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 21:55:42,355 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-02 21:55:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:42,510 INFO L93 Difference]: Finished difference Result 119 states and 156 transitions. [2023-04-02 21:55:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 21:55:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) Word has length 49 [2023-04-02 21:55:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:42,512 INFO L225 Difference]: With dead ends: 119 [2023-04-02 21:55:42,512 INFO L226 Difference]: Without dead ends: 100 [2023-04-02 21:55:42,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 21:55:42,514 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 73 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:42,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 249 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:55:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-02 21:55:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2023-04-02 21:55:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 77 states have internal predecessors, (97), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2023-04-02 21:55:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2023-04-02 21:55:42,535 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 49 [2023-04-02 21:55:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:42,535 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2023-04-02 21:55:42,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-02 21:55:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2023-04-02 21:55:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 21:55:42,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:42,537 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:55:42,552 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 21:55:42,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:42,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:42,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:42,744 INFO L85 PathProgramCache]: Analyzing trace with hash 543855124, now seen corresponding path program 1 times [2023-04-02 21:55:42,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:42,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965058995] [2023-04-02 21:55:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:42,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 21:55:42,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965058995] [2023-04-02 21:55:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965058995] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365550942] [2023-04-02 21:55:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:42,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:42,992 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 21:55:42,994 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 21:55:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:43,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 21:55:43,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 21:55:43,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 21:55:43,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365550942] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:55:43,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 21:55:43,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 11 [2023-04-02 21:55:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318532890] [2023-04-02 21:55:43,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:55:43,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 21:55:43,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 21:55:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-02 21:55:43,220 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 11 states, 9 states have (on average 5.555555555555555) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 21:55:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:43,452 INFO L93 Difference]: Finished difference Result 194 states and 252 transitions. [2023-04-02 21:55:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 21:55:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.555555555555555) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 70 [2023-04-02 21:55:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:43,454 INFO L225 Difference]: With dead ends: 194 [2023-04-02 21:55:43,454 INFO L226 Difference]: Without dead ends: 113 [2023-04-02 21:55:43,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-04-02 21:55:43,455 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 45 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:43,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 425 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:55:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-02 21:55:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2023-04-02 21:55:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 88 states have internal predecessors, (110), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) [2023-04-02 21:55:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2023-04-02 21:55:43,477 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 70 [2023-04-02 21:55:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:43,477 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2023-04-02 21:55:43,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.555555555555555) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 21:55:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2023-04-02 21:55:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 21:55:43,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:43,479 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:55:43,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 21:55:43,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:43,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:43,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1051447495, now seen corresponding path program 2 times [2023-04-02 21:55:43,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:43,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926708674] [2023-04-02 21:55:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:43,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 21:55:43,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:43,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926708674] [2023-04-02 21:55:43,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926708674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:43,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153813202] [2023-04-02 21:55:43,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:55:43,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:43,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:43,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:55:43,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 21:55:44,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 21:55:44,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:55:44,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 81 conjunts are in the unsatisfiable core [2023-04-02 21:55:44,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:44,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 21:55:44,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 21:55:44,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-04-02 21:55:44,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2023-04-02 21:55:44,560 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-04-02 21:55:44,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2023-04-02 21:55:44,583 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-04-02 21:55:44,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2023-04-02 21:55:44,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:55:44,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 68 [2023-04-02 21:55:44,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:55:44,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 53 treesize of output 53 [2023-04-02 21:55:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-02 21:55:45,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 21:55:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153813202] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:55:45,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 21:55:45,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [12] total 28 [2023-04-02 21:55:45,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124371172] [2023-04-02 21:55:45,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:55:45,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 21:55:45,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:45,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 21:55:45,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2023-04-02 21:55:45,021 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 18 states, 13 states have (on average 3.230769230769231) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 21:55:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:45,627 INFO L93 Difference]: Finished difference Result 216 states and 305 transitions. [2023-04-02 21:55:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 21:55:45,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 3.230769230769231) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 73 [2023-04-02 21:55:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:45,635 INFO L225 Difference]: With dead ends: 216 [2023-04-02 21:55:45,635 INFO L226 Difference]: Without dead ends: 185 [2023-04-02 21:55:45,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 21:55:45,637 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 103 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:45,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 505 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 21:55:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-04-02 21:55:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 134. [2023-04-02 21:55:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 108 states have (on average 1.287037037037037) internal successors, (139), 111 states have internal predecessors, (139), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-04-02 21:55:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2023-04-02 21:55:45,685 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 73 [2023-04-02 21:55:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:45,686 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2023-04-02 21:55:45,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 3.230769230769231) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 21:55:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2023-04-02 21:55:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 21:55:45,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:45,689 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:55:45,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 21:55:45,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:45,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:45,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:45,897 INFO L85 PathProgramCache]: Analyzing trace with hash 648195180, now seen corresponding path program 1 times [2023-04-02 21:55:45,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:45,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67864877] [2023-04-02 21:55:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 21:55:46,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:46,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67864877] [2023-04-02 21:55:46,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67864877] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:46,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159745764] [2023-04-02 21:55:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:46,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:55:46,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 21:55:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:46,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 21:55:46,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 21:55:46,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:55:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 21:55:46,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159745764] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:55:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364175354] [2023-04-02 21:55:46,726 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-04-02 21:55:46,726 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:55:46,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:55:46,726 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:55:46,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:55:46,742 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:55:47,417 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 40 for LOIs [2023-04-02 21:55:47,436 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 1 for LOIs [2023-04-02 21:55:47,473 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 16 for LOIs [2023-04-02 21:55:47,503 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 34 for LOIs [2023-04-02 21:55:47,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:55:47,555 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:55:51,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4375#(and (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |main_~#head~1.base|) (= main_~i~0 3) (<= main_~count~0 2147483647) (<= 0 main_~count~0) (not (= 5 main_~count~0)) (<= 0 main_~j~0) (= |main_~#head~1.offset| 0) (not (= main_~count~0 4)) (= 5 main_~max~0) (not (= main_~count~0 3)) (= |#NULL.offset| 0) (= main_~min~0 3) (= |#NULL.base| 0))' at error location [2023-04-02 21:55:51,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:55:51,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:55:51,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-04-02 21:55:51,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610017452] [2023-04-02 21:55:51,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:55:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 21:55:51,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 21:55:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 21:55:51,320 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 19 states, 16 states have (on average 5.5625) internal successors, (89), 19 states have internal predecessors, (89), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 8 states have call successors, (15) [2023-04-02 21:55:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:51,736 INFO L93 Difference]: Finished difference Result 249 states and 332 transitions. [2023-04-02 21:55:51,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 21:55:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 5.5625) internal successors, (89), 19 states have internal predecessors, (89), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 8 states have call successors, (15) Word has length 74 [2023-04-02 21:55:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:51,738 INFO L225 Difference]: With dead ends: 249 [2023-04-02 21:55:51,738 INFO L226 Difference]: Without dead ends: 129 [2023-04-02 21:55:51,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 182 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2023-04-02 21:55:51,740 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 62 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:51,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 405 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 21:55:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-02 21:55:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 106. [2023-04-02 21:55:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 87 states have internal predecessors, (110), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2023-04-02 21:55:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2023-04-02 21:55:51,770 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 74 [2023-04-02 21:55:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:51,770 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2023-04-02 21:55:51,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 5.5625) internal successors, (89), 19 states have internal predecessors, (89), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 8 states have call successors, (15) [2023-04-02 21:55:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2023-04-02 21:55:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 21:55:51,772 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:51,772 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 21:55:51,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 21:55:51,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:51,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:51,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash -520173890, now seen corresponding path program 1 times [2023-04-02 21:55:51,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:51,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86302127] [2023-04-02 21:55:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:51,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 21:55:52,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:52,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86302127] [2023-04-02 21:55:52,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86302127] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:52,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589868801] [2023-04-02 21:55:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:52,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:52,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:55:52,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 21:55:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:52,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 21:55:52,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 21:55:52,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:55:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 21:55:52,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589868801] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:55:52,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1384161840] [2023-04-02 21:55:52,749 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-02 21:55:52,749 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:55:52,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:55:52,749 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:55:52,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:55:52,766 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:55:53,135 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 40 for LOIs [2023-04-02 21:55:53,149 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 57 for LOIs [2023-04-02 21:55:53,249 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 57 for LOIs [2023-04-02 21:55:53,355 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 72 for LOIs [2023-04-02 21:55:53,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:55:53,429 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:56:00,668 WARN L223 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:56:01,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5243#(and (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |main_~#head~1.base|) (= main_~i~0 3) (<= main_~count~0 2147483647) (<= 0 main_~count~0) (not (= 5 main_~count~0)) (= main_~j~0 0) (= |main_~#head~1.offset| 0) (not (= main_~count~0 4)) (= 5 main_~max~0) (not (= main_~count~0 3)) (= |#NULL.offset| 0) (= main_~min~0 3) (= |#NULL.base| 0))' at error location [2023-04-02 21:56:01,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:56:01,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:56:01,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2023-04-02 21:56:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170375638] [2023-04-02 21:56:01,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:56:01,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 21:56:01,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:56:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 21:56:01,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 21:56:01,470 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 16 states have internal predecessors, (48), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-02 21:56:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:56:01,639 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2023-04-02 21:56:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 21:56:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 16 states have internal predecessors, (48), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 53 [2023-04-02 21:56:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:56:01,640 INFO L225 Difference]: With dead ends: 179 [2023-04-02 21:56:01,640 INFO L226 Difference]: Without dead ends: 123 [2023-04-02 21:56:01,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2023-04-02 21:56:01,642 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:56:01,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 434 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:56:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-02 21:56:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2023-04-02 21:56:01,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.28125) internal successors, (123), 98 states have internal predecessors, (123), 12 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (22), 14 states have call predecessors, (22), 11 states have call successors, (22) [2023-04-02 21:56:01,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 157 transitions. [2023-04-02 21:56:01,666 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 157 transitions. Word has length 53 [2023-04-02 21:56:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:56:01,666 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 157 transitions. [2023-04-02 21:56:01,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 16 states have internal predecessors, (48), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-02 21:56:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 157 transitions. [2023-04-02 21:56:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 21:56:01,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:56:01,667 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 21:56:01,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 21:56:01,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:56:01,869 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:56:01,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:56:01,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1960714929, now seen corresponding path program 2 times [2023-04-02 21:56:01,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:56:01,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144102505] [2023-04-02 21:56:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:56:01,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:56:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:56:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 21:56:05,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:56:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144102505] [2023-04-02 21:56:05,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144102505] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:56:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073433637] [2023-04-02 21:56:05,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:56:05,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:56:05,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:56:05,451 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:56:05,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 21:56:05,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 21:56:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:56:05,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 114 conjunts are in the unsatisfiable core [2023-04-02 21:56:05,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:56:05,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2023-04-02 21:56:05,976 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_895 Int)) (= |c_#valid| (store |c_old(#valid)| sll_create_~new_head~0.base v_ArrVal_895))))) is different from true [2023-04-02 21:56:05,999 WARN L861 $PredicateComparison]: unable to prove that (and (not (= c_sll_create_~new_head~0.base 0)) (exists ((v_ArrVal_896 Int) (v_ArrVal_895 Int) (v_sll_create_~new_head~0.base_76 Int)) (let ((.cse0 (store |c_old(#valid)| v_sll_create_~new_head~0.base_76 v_ArrVal_895))) (and (= 0 (select |c_old(#valid)| v_sll_create_~new_head~0.base_76)) (= |c_#valid| (store .cse0 c_sll_create_~new_head~0.base v_ArrVal_896)) (= 0 (select .cse0 c_sll_create_~new_head~0.base)))))) is different from true [2023-04-02 21:56:06,019 WARN L861 $PredicateComparison]: unable to prove that (and (not (= c_sll_create_~head~0.base 0)) (exists ((v_ArrVal_896 Int) (v_ArrVal_895 Int) (v_sll_create_~new_head~0.base_76 Int)) (let ((.cse0 (store |c_old(#valid)| v_sll_create_~new_head~0.base_76 v_ArrVal_895))) (and (= (select .cse0 c_sll_create_~head~0.base) 0) (= |c_#valid| (store .cse0 c_sll_create_~head~0.base v_ArrVal_896)) (= 0 (select |c_old(#valid)| v_sll_create_~new_head~0.base_76)))))) is different from true [2023-04-02 21:56:06,141 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 21:56:06,508 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-04-02 21:56:06,509 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 56 treesize of output 51 [2023-04-02 21:56:06,528 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 21:56:06,763 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 21:56:06,788 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-04-02 21:56:06,788 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 3 case distinctions, treesize of input 76 treesize of output 57 [2023-04-02 21:56:06,987 INFO L321 Elim1Store]: treesize reduction 56, result has 45.1 percent of original size [2023-04-02 21:56:06,988 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 76 treesize of output 88 [2023-04-02 21:56:07,009 INFO L321 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2023-04-02 21:56:07,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-04-02 21:56:07,585 INFO L321 Elim1Store]: treesize reduction 130, result has 58.5 percent of original size [2023-04-02 21:56:07,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 1011 treesize of output 1135 [2023-04-02 21:56:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:56:08,016 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 19 treesize of output 7 [2023-04-02 21:56:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 11 not checked. [2023-04-02 21:56:08,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:56:09,343 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:56:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:56:09,347 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 8222 treesize of output 7918 [2023-04-02 21:56:09,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073433637] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:56:09,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [874279543] [2023-04-02 21:56:09,588 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-02 21:56:09,588 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:56:09,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:56:09,589 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:56:09,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:56:09,602 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:56:09,952 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 40 for LOIs [2023-04-02 21:56:09,970 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 57 for LOIs [2023-04-02 21:56:10,057 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 57 for LOIs [2023-04-02 21:56:10,144 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 72 for LOIs [2023-04-02 21:56:10,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:56:10,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:56:16,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5960#(and (<= 1 |#StackHeapBarrier|) (<= (+ |#StackHeapBarrier| 1) |main_~#head~1.base|) (= main_~i~0 3) (<= main_~count~0 2147483647) (<= 0 main_~count~0) (not (= 5 main_~count~0)) (= main_~j~0 0) (= |main_~#head~1.offset| 0) (not (= main_~count~0 4)) (= 5 main_~max~0) (not (= main_~count~0 3)) (= |#NULL.offset| 0) (= main_~min~0 3) (= |#NULL.base| 0))' at error location [2023-04-02 21:56:16,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:56:16,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 21:56:16,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2023-04-02 21:56:16,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769452895] [2023-04-02 21:56:16,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 21:56:16,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-02 21:56:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:56:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-02 21:56:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=6827, Unknown=3, NotChecked=504, Total=7656 [2023-04-02 21:56:16,905 INFO L87 Difference]: Start difference. First operand 119 states and 157 transitions. Second operand has 47 states, 37 states have (on average 1.837837837837838) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 21:56:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:56:25,240 INFO L93 Difference]: Finished difference Result 368 states and 559 transitions. [2023-04-02 21:56:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-04-02 21:56:25,245 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.837837837837838) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 56 [2023-04-02 21:56:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:56:25,248 INFO L225 Difference]: With dead ends: 368 [2023-04-02 21:56:25,248 INFO L226 Difference]: Without dead ends: 314 [2023-04-02 21:56:25,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3202 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=608, Invalid=13443, Unknown=3, NotChecked=708, Total=14762 [2023-04-02 21:56:25,251 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 274 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 3344 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 4118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 705 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:56:25,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1672 Invalid, 4118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3344 Invalid, 0 Unknown, 705 Unchecked, 4.4s Time] [2023-04-02 21:56:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-04-02 21:56:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 241. [2023-04-02 21:56:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 200 states have (on average 1.31) internal successors, (262), 206 states have internal predecessors, (262), 23 states have call successors, (23), 7 states have call predecessors, (23), 17 states have return successors, (64), 27 states have call predecessors, (64), 22 states have call successors, (64) [2023-04-02 21:56:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 349 transitions. [2023-04-02 21:56:25,310 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 349 transitions. Word has length 56 [2023-04-02 21:56:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:56:25,310 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 349 transitions. [2023-04-02 21:56:25,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.837837837837838) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 21:56:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 349 transitions. [2023-04-02 21:56:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 21:56:25,311 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:56:25,312 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 21:56:25,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 21:56:25,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 21:56:25,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:56:25,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:56:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash -464050188, now seen corresponding path program 3 times [2023-04-02 21:56:25,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:56:25,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737893593] [2023-04-02 21:56:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:56:25,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:56:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:56:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 21:56:29,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:56:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737893593] [2023-04-02 21:56:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737893593] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:56:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453991590] [2023-04-02 21:56:29,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:56:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:56:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:56:29,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:56:29,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 21:56:29,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:56:29,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:56:29,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 129 conjunts are in the unsatisfiable core [2023-04-02 21:56:29,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:56:29,450 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 21:56:29,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-02 21:56:29,747 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 21:56:29,925 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-02 21:56:29,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2023-04-02 21:56:29,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:56:30,176 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-02 21:56:30,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 68 [2023-04-02 21:56:30,294 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-04-02 21:56:30,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 56 [2023-04-02 21:56:30,336 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-04-02 21:56:30,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 37 [2023-04-02 21:56:30,734 INFO L321 Elim1Store]: treesize reduction 44, result has 53.2 percent of original size [2023-04-02 21:56:30,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 151 treesize of output 125 [2023-04-02 21:56:31,008 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-04-02 21:56:31,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 48 [2023-04-02 21:56:31,400 INFO L321 Elim1Store]: treesize reduction 80, result has 60.8 percent of original size [2023-04-02 21:56:31,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 145 treesize of output 186 [2023-04-02 21:56:31,454 INFO L321 Elim1Store]: treesize reduction 108, result has 21.7 percent of original size [2023-04-02 21:56:31,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 46 [2023-04-02 21:56:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 21:56:35,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:56:37,174 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:56:37,210 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:56:37,212 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:56:40,276 INFO L321 Elim1Store]: treesize reduction 11330, result has 1.3 percent of original size [2023-04-02 21:56:40,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 3 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 68 case distinctions, treesize of input 150968314 treesize of output 146359362 [2023-04-02 21:58:18,428 WARN L223 SmtUtils]: Spent 1.64m on a formula simplification. DAG size of input: 3001 DAG size of output: 1516 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-02 21:58:19,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21759 treesize of output 21737 [2023-04-02 21:58:23,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-04-02 21:58:28,470 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:58:29,239 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:58:57,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:58:57,600 INFO L173 IndexEqualityManager]: detected equality via solver