/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/sll2c_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:54:55,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:54:55,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:54:55,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:54:55,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:54:55,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:54:55,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:54:55,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:54:55,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:54:55,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:54:55,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:54:55,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:54:55,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:54:55,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:54:55,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:54:55,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:54:55,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:54:55,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:54:55,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:54:55,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:54:55,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:54:55,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:54:55,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:54:55,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:54:55,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:54:55,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:54:55,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:54:55,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:54:55,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:54:55,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:54:55,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:54:55,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:54:55,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:54:55,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:54:55,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:54:55,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:54:55,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:54:55,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:54:55,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:54:55,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:54:55,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:54:55,778 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 22:54:55,803 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:54:55,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:54:55,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:54:55,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:54:55,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:54:55,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:54:55,804 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:54:55,804 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:54:55,804 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:54:55,804 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:54:55,805 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:54:55,805 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:54:55,805 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:54:55,805 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:54:55,805 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:54:55,805 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:54:55,806 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:54:55,806 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:54:55,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:54:55,806 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:54:55,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:54:55,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:54:55,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:54:55,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:54:55,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:54:55,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:54:55,807 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:54:55,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:54:55,807 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:54:55,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:54:55,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:54:55,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:54:55,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:54:55,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:54:55,807 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:54:55,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:54:55,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:54:55,808 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:54:55,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:54:55,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:54:55,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:54:55,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:54:55,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:54:56,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:54:56,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:54:56,022 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:54:56,024 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:54:56,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2023-03-31 22:54:56,980 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:54:57,231 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:54:57,231 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2023-03-31 22:54:57,239 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aec78b63/5259f7435fe2406784f6d6c9f17c40e7/FLAGd9c652bfc [2023-03-31 22:54:57,250 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aec78b63/5259f7435fe2406784f6d6c9f17c40e7 [2023-03-31 22:54:57,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:54:57,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:54:57,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:54:57,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:54:57,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:54:57,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cfcd5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57, skipping insertion in model container [2023-03-31 22:54:57,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:54:57,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:54:57,471 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/sll2c_remove_all.i[24082,24095] [2023-03-31 22:54:57,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:54:57,488 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:54:57,523 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/sll2c_remove_all.i[24082,24095] [2023-03-31 22:54:57,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:54:57,545 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:54:57,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57 WrapperNode [2023-03-31 22:54:57,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:54:57,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:54:57,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:54:57,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:54:57,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,579 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:54:57,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:54:57,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:54:57,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:54:57,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (1/1) ... [2023-03-31 22:54:57,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:54:57,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:54:57,609 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 22:54:57,615 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 22:54:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:54:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:54:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:54:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:54:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:54:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 22:54:57,644 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-03-31 22:54:57,644 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2023-03-31 22:54:57,644 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_first [2023-03-31 22:54:57,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:54:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:54:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:54:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:54:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:54:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:54:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:54:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:54:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:54:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:54:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:54:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:54:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:54:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:54:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:54:57,653 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_first [2023-03-31 22:54:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:54:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:54:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:54:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:54:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-03-31 22:54:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:54:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:54:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:54:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:54:57,883 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:54:57,884 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:54:57,912 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 22:54:58,043 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:54:58,066 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:54:58,066 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 22:54:58,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:54:58 BoogieIcfgContainer [2023-03-31 22:54:58,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:54:58,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:54:58,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:54:58,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:54:58,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:54:57" (1/3) ... [2023-03-31 22:54:58,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df7ab6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:54:58, skipping insertion in model container [2023-03-31 22:54:58,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:54:57" (2/3) ... [2023-03-31 22:54:58,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df7ab6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:54:58, skipping insertion in model container [2023-03-31 22:54:58,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:54:58" (3/3) ... [2023-03-31 22:54:58,074 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2023-03-31 22:54:58,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:54:58,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:54:58,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:54:58,131 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;@31aabdd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:54:58,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:54:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 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) [2023-03-31 22:54:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 22:54:58,140 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:54:58,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:54:58,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:54:58,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:54:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash 554792222, now seen corresponding path program 1 times [2023-03-31 22:54:58,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:54:58,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355160027] [2023-03-31 22:54:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:54:58,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:54:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:54:58,517 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 22:54:58,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:54:58,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355160027] [2023-03-31 22:54:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355160027] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:54:58,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:54:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:54:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26153506] [2023-03-31 22:54:58,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:54:58,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:54:58,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:54:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:54:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:54:58,550 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 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) Second operand has 5 states, 3 states have (on average 4.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:54:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:54:58,633 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2023-03-31 22:54:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:54:58,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-03-31 22:54:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:54:58,640 INFO L225 Difference]: With dead ends: 60 [2023-03-31 22:54:58,641 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 22:54:58,643 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 22:54:58,645 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:54:58,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:54:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 22:54:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-03-31 22:54:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 22:54:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-03-31 22:54:58,673 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2023-03-31 22:54:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:54:58,673 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-03-31 22:54:58,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:54:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-03-31 22:54:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:54:58,674 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:54:58,675 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] [2023-03-31 22:54:58,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:54:58,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:54:58,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:54:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2092205103, now seen corresponding path program 1 times [2023-03-31 22:54:58,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:54:58,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674463458] [2023-03-31 22:54:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:54:58,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:54:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:54:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 22:54:58,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:54:58,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674463458] [2023-03-31 22:54:58,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674463458] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:54:58,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:54:58,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 22:54:58,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013580990] [2023-03-31 22:54:58,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:54:58,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:54:58,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:54:58,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:54:58,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:54:58,763 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-03-31 22:54:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:54:58,787 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-03-31 22:54:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:54:58,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 26 [2023-03-31 22:54:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:54:58,788 INFO L225 Difference]: With dead ends: 38 [2023-03-31 22:54:58,788 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 22:54:58,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:54:58,789 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:54:58,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 53 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:54:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 22:54:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-03-31 22:54:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 22:54:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-03-31 22:54:58,795 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2023-03-31 22:54:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:54:58,796 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-03-31 22:54:58,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-03-31 22:54:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-03-31 22:54:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:54:58,798 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:54:58,799 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, 1] [2023-03-31 22:54:58,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:54:58,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:54:58,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:54:58,805 INFO L85 PathProgramCache]: Analyzing trace with hash -107086583, now seen corresponding path program 1 times [2023-03-31 22:54:58,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:54:58,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422809723] [2023-03-31 22:54:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:54:58,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:54:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:54:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 22:54:58,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:54:58,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422809723] [2023-03-31 22:54:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422809723] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:54:58,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114381213] [2023-03-31 22:54:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:54:58,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:54:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:54:58,973 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 22:54:58,974 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 22:54:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:54:59,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:54:59,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:54:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 22:54:59,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:54:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 22:54:59,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114381213] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:54:59,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610025976] [2023-03-31 22:54:59,325 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-03-31 22:54:59,325 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:54:59,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:54:59,332 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:54:59,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:54:59,412 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:54:59,944 INFO L197 IcfgInterpreter]: Interpreting procedure sll_circular_create with input of size 44 for LOIs [2023-03-31 22:55:00,167 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2023-03-31 22:55:00,177 INFO L197 IcfgInterpreter]: Interpreting procedure sll_circular_remove_first with input of size 24 for LOIs [2023-03-31 22:55:00,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:55:00,196 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:55:01,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '497#(and (<= 0 |main_~#s~0.base|) (= main_~data~0 1) (<= main_~len~0 main_~i~0) (= |main_~#s~0.offset| 0) (or (not (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) |main_~#s~0.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) |main_~#s~0.offset|) 0))) (= main_~len~0 2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:55:01,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:55:01,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:55:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-03-31 22:55:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410488887] [2023-03-31 22:55:01,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:55:01,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 22:55:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 22:55:01,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-03-31 22:55:01,049 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-03-31 22:55:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:01,080 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-03-31 22:55:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:55:01,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 33 [2023-03-31 22:55:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:01,081 INFO L225 Difference]: With dead ends: 39 [2023-03-31 22:55:01,081 INFO L226 Difference]: Without dead ends: 36 [2023-03-31 22:55:01,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-03-31 22:55:01,082 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:01,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 121 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:55:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-31 22:55:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-03-31 22:55:01,086 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 22:55:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-03-31 22:55:01,087 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2023-03-31 22:55:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:01,087 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-03-31 22:55:01,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-03-31 22:55:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-03-31 22:55:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 22:55:01,088 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:01,088 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:55:01,109 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 22:55:01,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:01,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:01,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:01,297 INFO L85 PathProgramCache]: Analyzing trace with hash -681723153, now seen corresponding path program 2 times [2023-03-31 22:55:01,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:01,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217592334] [2023-03-31 22:55:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:01,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:55:01,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:01,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217592334] [2023-03-31 22:55:01,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217592334] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:55:01,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:55:01,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 22:55:01,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307513036] [2023-03-31 22:55:01,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:55:01,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 22:55:01,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:01,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 22:55:01,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:55:01,536 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-03-31 22:55:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:01,619 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-03-31 22:55:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:55:01,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2023-03-31 22:55:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:01,622 INFO L225 Difference]: With dead ends: 51 [2023-03-31 22:55:01,622 INFO L226 Difference]: Without dead ends: 48 [2023-03-31 22:55:01,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:55:01,623 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:01,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:55:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-03-31 22:55:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2023-03-31 22:55:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-03-31 22:55:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-03-31 22:55:01,627 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 40 [2023-03-31 22:55:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:01,628 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-03-31 22:55:01,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-03-31 22:55:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-03-31 22:55:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 22:55:01,629 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:01,629 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:55:01,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:55:01,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:01,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:01,629 INFO L85 PathProgramCache]: Analyzing trace with hash -704564386, now seen corresponding path program 1 times [2023-03-31 22:55:01,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:01,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151787163] [2023-03-31 22:55:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:01,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:55:01,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:01,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151787163] [2023-03-31 22:55:01,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151787163] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:55:01,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:55:01,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:55:01,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849212747] [2023-03-31 22:55:01,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:55:01,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:55:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:55:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:55:01,879 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-03-31 22:55:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:01,940 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2023-03-31 22:55:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:55:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2023-03-31 22:55:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:01,941 INFO L225 Difference]: With dead ends: 57 [2023-03-31 22:55:01,941 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 22:55:01,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 22:55:01,942 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:01,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 95 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:55:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 22:55:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-03-31 22:55:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-03-31 22:55:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-03-31 22:55:01,947 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 43 [2023-03-31 22:55:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:01,947 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-03-31 22:55:01,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-03-31 22:55:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-03-31 22:55:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:55:01,948 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:01,948 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:55:01,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:55:01,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:01,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -456925159, now seen corresponding path program 1 times [2023-03-31 22:55:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:01,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129108242] [2023-03-31 22:55:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:55:02,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129108242] [2023-03-31 22:55:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129108242] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:55:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187817815] [2023-03-31 22:55:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:02,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:02,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:55:02,512 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 22:55:02,514 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 22:55:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:02,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 66 conjunts are in the unsatisfiable core [2023-03-31 22:55:02,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:55:02,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 22:55:02,736 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 22:55:02,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 22:55:02,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 22:55:02,778 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-03-31 22:55:02,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-03-31 22:55:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:55:02,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:55:02,927 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 29 treesize of output 21 [2023-03-31 22:55:03,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Complicated and unsupported kind of self-update: (let ((.cse0 (select (select |v_#memory_$Pointer$.base_103| |main_~#s~0.base|) |main_~#s~0.offset|))) (store |v_#memory_$Pointer$.base_102| .cse0 (store (select |v_#memory_$Pointer$.base_102| .cse0) |v_main_#t~ret16.offset_10| v_sll_circular_create_~last~0.base_12))) [2023-03-31 22:55:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1112600365] [2023-03-31 22:55:03,035 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-03-31 22:55:03,035 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:55:03,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:55:03,035 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:55:03,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:55:03,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:55:03,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 22:55:03,245 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@c047355 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateLight(PartialQuantifierElimination.java:109) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$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 22:55:03,248 INFO L158 Benchmark]: Toolchain (without parser) took 5994.30ms. Allocated memory was 339.7MB in the beginning and 429.9MB in the end (delta: 90.2MB). Free memory was 287.1MB in the beginning and 298.1MB in the end (delta: -11.0MB). Peak memory consumption was 81.3MB. Max. memory is 8.0GB. [2023-03-31 22:55:03,248 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 217.1MB. Free memory is still 163.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:55:03,248 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.61ms. Allocated memory is still 339.7MB. Free memory was 287.1MB in the beginning and 270.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-03-31 22:55:03,248 INFO L158 Benchmark]: Boogie Preprocessor took 38.63ms. Allocated memory is still 339.7MB. Free memory was 270.3MB in the beginning and 267.2MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-03-31 22:55:03,248 INFO L158 Benchmark]: RCFGBuilder took 482.31ms. Allocated memory is still 339.7MB. Free memory was 267.2MB in the beginning and 242.5MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2023-03-31 22:55:03,248 INFO L158 Benchmark]: TraceAbstraction took 5177.29ms. Allocated memory was 339.7MB in the beginning and 429.9MB in the end (delta: 90.2MB). Free memory was 241.5MB in the beginning and 298.1MB in the end (delta: -56.6MB). Peak memory consumption was 35.1MB. Max. memory is 8.0GB. [2023-03-31 22:55:03,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 217.1MB. Free memory is still 163.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 291.61ms. Allocated memory is still 339.7MB. Free memory was 287.1MB in the beginning and 270.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.63ms. Allocated memory is still 339.7MB. Free memory was 270.3MB in the beginning and 267.2MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 482.31ms. Allocated memory is still 339.7MB. Free memory was 267.2MB in the beginning and 242.5MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 5177.29ms. Allocated memory was 339.7MB in the beginning and 429.9MB in the end (delta: 90.2MB). Free memory was 241.5MB in the beginning and 298.1MB in the end (delta: -56.6MB). Peak memory consumption was 35.1MB. 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@c047355 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@c047355: 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 22:55:03,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...