/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 IntervalDomain -i ../sv-benchmarks/c/list-simple/sll2n_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:55:09,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:55:09,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:55:09,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:55:09,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:55:09,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:55:09,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:55:09,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:55:09,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:55:09,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:55:09,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:55:09,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:55:09,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:55:09,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:55:09,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:55:09,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:55:09,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:55:09,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:55:09,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:55:09,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:55:09,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:55:09,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:55:09,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:55:09,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:55:09,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:55:09,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:55:09,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:55:09,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:55:09,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:55:09,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:55:09,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:55:09,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:55:09,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:55:09,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:55:09,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:55:09,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:55:09,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:55:09,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:55:09,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:55:09,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:55:09,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:55:09,665 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 [2023-03-31 22:55:09,687 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:55:09,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:55:09,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:55:09,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:55:09,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:55:09,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:55:09,688 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:55:09,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:55:09,688 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:55:09,688 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:55:09,689 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:55:09,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:55:09,689 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:55:09,689 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:55:09,689 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:55:09,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:55:09,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:55:09,689 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:55:09,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:55:09,690 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:55:09,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:55:09,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:55:09,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:55:09,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:55:09,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:55:09,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:55:09,691 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:55:09,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:55:09,691 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:55:09,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:55:09,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:55:09,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:55:09,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:55:09,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:55:09,691 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:55:09,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:55:09,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:55:09,692 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:55:09,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:55:09,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:55:09,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:55:09,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:55:09,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:55:09,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:55:09,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:55:09,886 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:55:09,886 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:55:09,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2023-03-31 22:55:10,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:55:11,038 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:55:11,039 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2023-03-31 22:55:11,049 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1191b65ce/a563162977f84e67b2ed54722fea9bfb/FLAGf97a3a024 [2023-03-31 22:55:11,059 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1191b65ce/a563162977f84e67b2ed54722fea9bfb [2023-03-31 22:55:11,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:55:11,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:55:11,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:55:11,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:55:11,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:55:11,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7c21b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11, skipping insertion in model container [2023-03-31 22:55:11,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:55:11,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:55:11,294 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-simple/sll2n_append_equal.i[24197,24210] [2023-03-31 22:55:11,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:55:11,309 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:55:11,359 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-simple/sll2n_append_equal.i[24197,24210] [2023-03-31 22:55:11,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:55:11,380 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:55:11,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11 WrapperNode [2023-03-31 22:55:11,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:55:11,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:55:11,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:55:11,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:55:11,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,426 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:55:11,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:55:11,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:55:11,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:55:11,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (1/1) ... [2023-03-31 22:55:11,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:55:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:55:11,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:55:11,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:55:11,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2023-03-31 22:55:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:55:11,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:55:11,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:55:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:55:11,483 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:55:11,484 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:55:11,485 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:55:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:55:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:55:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2023-03-31 22:55:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:55:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:55:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-03-31 22:55:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:55:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:55:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:55:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:55:11,646 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:55:11,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:55:11,716 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 22:55:11,893 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:55:11,934 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:55:11,934 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 22:55:11,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:55:11 BoogieIcfgContainer [2023-03-31 22:55:11,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:55:11,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:55:11,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:55:11,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:55:11,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:55:11" (1/3) ... [2023-03-31 22:55:11,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a0fe3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:55:11, skipping insertion in model container [2023-03-31 22:55:11,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:11" (2/3) ... [2023-03-31 22:55:11,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a0fe3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:55:11, skipping insertion in model container [2023-03-31 22:55:11,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:55:11" (3/3) ... [2023-03-31 22:55:11,945 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2023-03-31 22:55:11,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:55:11,960 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:55:12,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:55:12,018 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;@7a06ce91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:55:12,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:55:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:55:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:55:12,028 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:12,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:55:12,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:12,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1220174291, now seen corresponding path program 1 times [2023-03-31 22:55:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:12,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813897165] [2023-03-31 22:55:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:12,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:55:12,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:12,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813897165] [2023-03-31 22:55:12,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813897165] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:55:12,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:55:12,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:55:12,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485816160] [2023-03-31 22:55:12,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:55:12,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:55:12,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:55:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:55:12,411 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 22:55:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:12,489 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2023-03-31 22:55:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:55:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-03-31 22:55:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:12,495 INFO L225 Difference]: With dead ends: 81 [2023-03-31 22:55:12,496 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 22:55:12,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:55:12,505 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:12,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 150 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:55:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 22:55:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-03-31 22:55:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:55:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-03-31 22:55:12,538 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2023-03-31 22:55:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:12,539 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-03-31 22:55:12,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 22:55:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-03-31 22:55:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 22:55:12,541 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:12,541 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:55:12,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:55:12,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:12,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2027299310, now seen corresponding path program 1 times [2023-03-31 22:55:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:12,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213130923] [2023-03-31 22:55:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:55:12,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:12,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213130923] [2023-03-31 22:55:12,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213130923] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:55:12,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023815549] [2023-03-31 22:55:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:12,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:12,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:55:12,760 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:55:12,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:55:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:12,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 22:55:12,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:55:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:55:12,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:55:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:55:13,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023815549] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:55:13,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579515696] [2023-03-31 22:55:13,137 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-03-31 22:55:13,138 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:55:13,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:55:13,143 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:55:13,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:55:13,189 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:55:13,520 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 44 for LOIs [2023-03-31 22:55:13,744 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 33 for LOIs [2023-03-31 22:55:13,826 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2023-03-31 22:55:13,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:55:13,844 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:55:14,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '421#(and (<= 0 |main_~#s~0.base|) (= main_~data~0 1) (= |main_~#s~0.offset| 0) (= main_~count~0 0) (= main_~ptr~0.offset 0) (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) 0) (= main_~len~0 2) (= main_~ptr~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0) 0) (= |#NULL.base| 0))' at error location [2023-03-31 22:55:14,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:55:14,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:55:14,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-03-31 22:55:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657940571] [2023-03-31 22:55:14,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:55:14,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 22:55:14,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 22:55:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 22:55:14,639 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 12 states, 8 states have (on average 4.25) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-03-31 22:55:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:14,701 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-03-31 22:55:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:55:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 4.25) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 32 [2023-03-31 22:55:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:14,702 INFO L225 Difference]: With dead ends: 60 [2023-03-31 22:55:14,702 INFO L226 Difference]: Without dead ends: 38 [2023-03-31 22:55:14,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 22:55:14,704 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:14,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 131 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:55:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-31 22:55:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-03-31 22:55:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:55:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-03-31 22:55:14,708 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 32 [2023-03-31 22:55:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:14,708 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-03-31 22:55:14,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 4.25) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-03-31 22:55:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-03-31 22:55:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 22:55:14,709 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:14,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:55:14,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:55:14,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:14,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:14,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1610552077, now seen corresponding path program 2 times [2023-03-31 22:55:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:14,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113267189] [2023-03-31 22:55:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 22:55:15,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:15,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113267189] [2023-03-31 22:55:15,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113267189] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:55:15,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:55:15,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 22:55:15,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338988942] [2023-03-31 22:55:15,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:55:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 22:55:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 22:55:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:55:15,130 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 22:55:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:15,215 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2023-03-31 22:55:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 22:55:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-03-31 22:55:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:15,216 INFO L225 Difference]: With dead ends: 51 [2023-03-31 22:55:15,216 INFO L226 Difference]: Without dead ends: 48 [2023-03-31 22:55:15,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:55:15,217 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:15,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 167 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:55:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-03-31 22:55:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2023-03-31 22:55:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-31 22:55:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-03-31 22:55:15,221 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 39 [2023-03-31 22:55:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:15,225 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-03-31 22:55:15,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 22:55:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-03-31 22:55:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 22:55:15,227 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:15,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:55:15,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:55:15,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:15,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1610480715, now seen corresponding path program 1 times [2023-03-31 22:55:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:15,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010708617] [2023-03-31 22:55:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:15,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:55:15,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:15,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010708617] [2023-03-31 22:55:15,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010708617] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:55:15,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608650101] [2023-03-31 22:55:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:15,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:15,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:55:15,677 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:55:15,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:55:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:15,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-31 22:55:15,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:55:15,907 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 8 treesize of output 4 [2023-03-31 22:55:15,946 WARN L861 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.base Int)) (and (exists ((v_ArrVal_265 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base v_ArrVal_265))) (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|))) is different from true [2023-03-31 22:55:18,025 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_265 (Array Int Int)) (node_create_~temp~0.base Int)) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base v_ArrVal_265) |c_sll_append_#in~head.base|) |c_sll_append_#in~head.offset|) 0) (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|))) is different from true [2023-03-31 22:55:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-03-31 22:55:18,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:55:18,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608650101] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:55:18,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266420515] [2023-03-31 22:55:18,131 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-03-31 22:55:18,131 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:55:18,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:55:18,131 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:55:18,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:55:18,149 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:55:18,295 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 44 for LOIs [2023-03-31 22:55:18,414 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 33 for LOIs [2023-03-31 22:55:18,487 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2023-03-31 22:55:18,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:55:18,499 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:55:19,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '892#(and (<= 0 |main_~#s~0.base|) (= main_~data~0 1) (= |main_~#s~0.offset| 0) (= main_~count~0 0) (= main_~ptr~0.base (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0)) (= main_~len~0 2) (= main_~temp~2.base (select (select |#memory_$Pointer$.base| main_~ptr~0.base) (+ main_~ptr~0.offset 4))) (not (= (select (select |#memory_int| main_~ptr~0.base) main_~ptr~0.offset) 1)) (= |#NULL.offset| 0) (or (not (= main_~ptr~0.offset 0)) (not (= main_~ptr~0.base 0))) (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) main_~ptr~0.offset) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) main_~temp~2.offset) (= |#NULL.base| 0))' at error location [2023-03-31 22:55:19,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:55:19,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:55:19,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2023-03-31 22:55:19,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343855780] [2023-03-31 22:55:19,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:55:19,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 22:55:19,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:19,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 22:55:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2055, Unknown=32, NotChecked=186, Total=2450 [2023-03-31 22:55:19,673 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 25 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-03-31 22:55:22,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 22:55:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:22,167 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-03-31 22:55:22,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 22:55:22,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2023-03-31 22:55:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:22,168 INFO L225 Difference]: With dead ends: 45 [2023-03-31 22:55:22,168 INFO L226 Difference]: Without dead ends: 36 [2023-03-31 22:55:22,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=217, Invalid=2833, Unknown=38, NotChecked=218, Total=3306 [2023-03-31 22:55:22,170 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 8 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:22,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 277 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 446 Invalid, 15 Unknown, 81 Unchecked, 2.3s Time] [2023-03-31 22:55:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-31 22:55:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-03-31 22:55:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:55:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-03-31 22:55:22,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 39 [2023-03-31 22:55:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:22,174 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-03-31 22:55:22,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-03-31 22:55:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-03-31 22:55:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 22:55:22,175 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:22,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-03-31 22:55:22,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:55:22,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 22:55:22,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:22,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash 608993223, now seen corresponding path program 1 times [2023-03-31 22:55:22,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:22,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545618434] [2023-03-31 22:55:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:22,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:55:22,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:22,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545618434] [2023-03-31 22:55:22,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545618434] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:55:22,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729390854] [2023-03-31 22:55:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:22,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:22,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:55:22,871 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:55:22,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:55:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:23,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 32 conjunts are in the unsatisfiable core [2023-03-31 22:55:23,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:55:23,176 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 8 treesize of output 4 [2023-03-31 22:55:23,202 WARN L861 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (exists ((v_ArrVal_384 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base v_ArrVal_384))))) is different from true [2023-03-31 22:55:23,207 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_384 (Array Int Int)) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base v_ArrVal_384)))) is different from true [2023-03-31 22:55:23,284 WARN L861 $PredicateComparison]: unable to prove that (exists ((sll_append_~last~0.offset Int) (v_ArrVal_385 Int) (v_ArrVal_384 (Array Int Int)) (sll_append_~last~0.base Int) (node_create_~temp~0.base Int)) (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base v_ArrVal_384))) (let ((.cse1 (select .cse0 sll_append_~last~0.base)) (.cse2 (+ sll_append_~last~0.offset 4))) (and (= |c_#memory_$Pointer$.base| (store .cse0 sll_append_~last~0.base (store .cse1 .cse2 v_ArrVal_385))) (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select .cse1 .cse2) 0))))) is different from true [2023-03-31 22:55:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:55:23,335 INFO L321 Elim1Store]: treesize reduction 69, result has 34.3 percent of original size [2023-03-31 22:55:23,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 125 [2023-03-31 22:55:23,370 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 39 treesize of output 12 [2023-03-31 22:55:23,391 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 18 treesize of output 13 [2023-03-31 22:55:23,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2023-03-31 22:55:23,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no need to replace index [2023-03-31 22:55:23,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878045860] [2023-03-31 22:55:23,460 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-03-31 22:55:23,460 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:55:23,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:55:23,461 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:55:23,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:55:23,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:55:23,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:23,671 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@60ae4ab at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateLight(PartialQuantifierElimination.java:109) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$TermDomainOperationProviderWithLightElimination.newQuantifier(SymbolicTools.java:284) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$TermDomainOperationProviderWithLightElimination.projectExistentially(SymbolicTools.java:270) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-03-31 22:55:23,675 INFO L158 Benchmark]: Toolchain (without parser) took 12612.77ms. Allocated memory was 187.7MB in the beginning and 327.2MB in the end (delta: 139.5MB). Free memory was 149.7MB in the beginning and 239.8MB in the end (delta: -90.1MB). Peak memory consumption was 51.4MB. Max. memory is 8.0GB. [2023-03-31 22:55:23,675 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 187.7MB. Free memory is still 139.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:55:23,675 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.89ms. Allocated memory is still 187.7MB. Free memory was 149.6MB in the beginning and 132.3MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-03-31 22:55:23,675 INFO L158 Benchmark]: Boogie Preprocessor took 49.18ms. Allocated memory is still 187.7MB. Free memory was 132.3MB in the beginning and 129.2MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-03-31 22:55:23,675 INFO L158 Benchmark]: RCFGBuilder took 506.64ms. Allocated memory is still 187.7MB. Free memory was 129.2MB in the beginning and 104.1MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2023-03-31 22:55:23,676 INFO L158 Benchmark]: TraceAbstraction took 11734.21ms. Allocated memory was 187.7MB in the beginning and 327.2MB in the end (delta: 139.5MB). Free memory was 103.4MB in the beginning and 240.2MB in the end (delta: -136.7MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2023-03-31 22:55:23,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 187.7MB. Free memory is still 139.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 317.89ms. Allocated memory is still 187.7MB. Free memory was 149.6MB in the beginning and 132.3MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 49.18ms. Allocated memory is still 187.7MB. Free memory was 132.3MB in the beginning and 129.2MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 506.64ms. Allocated memory is still 187.7MB. Free memory was 129.2MB in the beginning and 104.1MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 11734.21ms. Allocated memory was 187.7MB in the beginning and 327.2MB in the end (delta: 139.5MB). Free memory was 103.4MB in the beginning and 240.2MB in the end (delta: -136.7MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@60ae4ab de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@60ae4ab: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2023-03-31 22:55:23,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...