/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 EqDomain -i ../sv-benchmarks/c/array-crafted/mapsum5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:55:02,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:55:02,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:55:03,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:55:03,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:55:03,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:55:03,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:55:03,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:55:03,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:55:03,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:55:03,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:55:03,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:55:03,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:55:03,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:55:03,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:55:03,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:55:03,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:55:03,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:55:03,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:55:03,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:55:03,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:55:03,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:55:03,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:55:03,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:55:03,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:55:03,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:55:03,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:55:03,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:55:03,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:55:03,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:55:03,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:55:03,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:55:03,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:55:03,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:55:03,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:55:03,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:55:03,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:55:03,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:55:03,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:55:03,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:55:03,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:55:03,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:55:03,087 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:55:03,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:55:03,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:55:03,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:55:03,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:55:03,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:55:03,089 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:55:03,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:55:03,089 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:55:03,089 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:55:03,090 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:55:03,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:55:03,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:55:03,090 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:55:03,090 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:55:03,090 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:55:03,090 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:55:03,090 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:55:03,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:55:03,091 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:55:03,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:55:03,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:55:03,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:55:03,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:55:03,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:55:03,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:55:03,092 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:55:03,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:55:03,092 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:55:03,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:55:03,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:55:03,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:55:03,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:55:03,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:55:03,093 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:55:03,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:55:03,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:55:03,093 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:55:03,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:55:03,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:55:03,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:55:03,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:55:03,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:55:03,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:55:03,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:55:03,308 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:55:03,309 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:55:03,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum5.i [2023-04-01 08:55:04,442 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:55:04,584 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:55:04,584 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum5.i [2023-04-01 08:55:04,589 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abeaec710/840055aa0d6447bfa7c2fb2df263a652/FLAG9c10d9e51 [2023-04-01 08:55:04,599 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abeaec710/840055aa0d6447bfa7c2fb2df263a652 [2023-04-01 08:55:04,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:55:04,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:55:04,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:55:04,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:55:04,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:55:04,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460b4f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04, skipping insertion in model container [2023-04-01 08:55:04,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:55:04,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:55:04,765 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/array-crafted/mapsum5.i[1380,1393] [2023-04-01 08:55:04,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:55:04,775 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:55:04,805 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/array-crafted/mapsum5.i[1380,1393] [2023-04-01 08:55:04,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:55:04,814 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:55:04,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04 WrapperNode [2023-04-01 08:55:04,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:55:04,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:55:04,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:55:04,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:55:04,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,854 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:55:04,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:55:04,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:55:04,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:55:04,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (1/1) ... [2023-04-01 08:55:04,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:55:04,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:04,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:55:04,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:55:04,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:55:04,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:55:04,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:55:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2023-04-01 08:55:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:55:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:55:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:55:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:55:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:55:04,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:55:04,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:55:04,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:55:05,051 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:55:05,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:55:05,182 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:55:05,223 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:55:05,223 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:55:05,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:55:05 BoogieIcfgContainer [2023-04-01 08:55:05,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:55:05,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:55:05,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:55:05,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:55:05,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:55:04" (1/3) ... [2023-04-01 08:55:05,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0a80c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:55:05, skipping insertion in model container [2023-04-01 08:55:05,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:04" (2/3) ... [2023-04-01 08:55:05,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0a80c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:55:05, skipping insertion in model container [2023-04-01 08:55:05,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:55:05" (3/3) ... [2023-04-01 08:55:05,239 INFO L112 eAbstractionObserver]: Analyzing ICFG mapsum5.i [2023-04-01 08:55:05,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:55:05,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:55:05,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:55:05,298 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;@2ac22a5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:55:05,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:55:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:55:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 08:55:05,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:05,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:55:05,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:05,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1001907620, now seen corresponding path program 1 times [2023-04-01 08:55:05,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:05,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142915696] [2023-04-01 08:55:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:05,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:55:05,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:05,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142915696] [2023-04-01 08:55:05,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142915696] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:55:05,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:55:05,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:55:05,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774011889] [2023-04-01 08:55:05,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:55:05,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:55:05,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:55:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:55:05,615 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:55:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:05,657 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-04-01 08:55:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:55:05,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-01 08:55:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:05,664 INFO L225 Difference]: With dead ends: 44 [2023-04-01 08:55:05,664 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 08:55:05,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:55:05,668 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:05,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:55:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 08:55:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 08:55:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:55:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 08:55:05,697 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-01 08:55:05,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:05,699 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 08:55:05,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:55:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 08:55:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 08:55:05,700 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:05,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:55:05,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:55:05,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:05,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1520431609, now seen corresponding path program 1 times [2023-04-01 08:55:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:05,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684863199] [2023-04-01 08:55:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:05,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:55:05,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:05,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684863199] [2023-04-01 08:55:05,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684863199] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:05,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632356963] [2023-04-01 08:55:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:05,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:05,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:05,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:55:05,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:55:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:06,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:55:06,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:55:06,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:55:06,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632356963] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:06,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054017201] [2023-04-01 08:55:06,160 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 08:55:06,161 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:06,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:06,167 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:06,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:06,281 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 08:55:07,016 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 27 for LOIs [2023-04-01 08:55:07,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:55:07,033 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2054017201] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:55:08,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:08,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [5, 4, 4] total 26 [2023-04-01 08:55:08,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970721641] [2023-04-01 08:55:08,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:55:08,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 08:55:08,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 08:55:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=577, Unknown=3, NotChecked=0, Total=650 [2023-04-01 08:55:08,195 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 19 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:55:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:08,982 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2023-04-01 08:55:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 08:55:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2023-04-01 08:55:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:08,984 INFO L225 Difference]: With dead ends: 37 [2023-04-01 08:55:08,984 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 08:55:08,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=149, Invalid=1180, Unknown=3, NotChecked=0, Total=1332 [2023-04-01 08:55:08,986 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:08,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 08:55:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 08:55:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-04-01 08:55:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 08:55:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2023-04-01 08:55:08,996 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2023-04-01 08:55:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:08,996 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2023-04-01 08:55:08,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:55:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2023-04-01 08:55:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 08:55:08,997 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:08,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:55:09,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:55:09,202 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 [2023-04-01 08:55:09,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:09,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash 8567949, now seen corresponding path program 1 times [2023-04-01 08:55:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:09,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636881659] [2023-04-01 08:55:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:09,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 08:55:09,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:09,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636881659] [2023-04-01 08:55:09,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636881659] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:09,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994926954] [2023-04-01 08:55:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:09,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:55:09,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:55:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:09,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:55:09,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:55:09,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:55:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994926954] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886221031] [2023-04-01 08:55:09,435 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 08:55:09,435 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:09,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:09,436 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:09,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:09,467 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 08:55:09,900 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 25 for LOIs [2023-04-01 08:55:09,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:55:09,932 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:10,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '592#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= ~N~0 1)) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= main_~i~2 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:10,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:10,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:10,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-04-01 08:55:10,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393125102] [2023-04-01 08:55:10,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:10,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 08:55:10,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 08:55:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2023-04-01 08:55:10,922 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 08:55:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:10,967 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2023-04-01 08:55:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 08:55:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 27 [2023-04-01 08:55:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:10,968 INFO L225 Difference]: With dead ends: 43 [2023-04-01 08:55:10,968 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 08:55:10,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:55:10,972 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:10,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 55 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:55:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 08:55:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 08:55:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:55:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-04-01 08:55:10,988 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 27 [2023-04-01 08:55:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:10,988 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-04-01 08:55:10,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 08:55:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-04-01 08:55:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:55:10,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:10,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:55:11,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:55:11,190 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,SelfDestructingSolverStorable2 [2023-04-01 08:55:11,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:11,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash 818000362, now seen corresponding path program 2 times [2023-04-01 08:55:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:11,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933374702] [2023-04-01 08:55:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:11,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 08:55:11,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933374702] [2023-04-01 08:55:11,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933374702] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:55:11,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:55:11,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:55:11,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729586830] [2023-04-01 08:55:11,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:55:11,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:55:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:55:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:55:11,278 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:55:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:11,300 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-01 08:55:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:55:11,300 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), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-04-01 08:55:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:11,301 INFO L225 Difference]: With dead ends: 33 [2023-04-01 08:55:11,301 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 08:55:11,302 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 [2023-04-01 08:55:11,303 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:11,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:55:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 08:55:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 08:55:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:55:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-01 08:55:11,313 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-04-01 08:55:11,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:11,314 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-01 08:55:11,314 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), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:55:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-01 08:55:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 08:55:11,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:11,315 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:55:11,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 08:55:11,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:11,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 358952038, now seen corresponding path program 1 times [2023-04-01 08:55:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:11,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927866613] [2023-04-01 08:55:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:11,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 08:55:11,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:11,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927866613] [2023-04-01 08:55:11,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927866613] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:11,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720385020] [2023-04-01 08:55:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:11,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:11,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:11,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:55:11,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:55:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:11,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:55:11,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 08:55:11,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 08:55:11,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720385020] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:11,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293737973] [2023-04-01 08:55:11,583 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 08:55:11,583 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:11,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:11,584 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:11,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:11,624 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 08:55:11,977 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 25 for LOIs [2023-04-01 08:55:11,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:55:11,999 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:12,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1002#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= ~N~0 1)) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:12,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:12,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:12,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-04-01 08:55:12,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945531734] [2023-04-01 08:55:12,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:12,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 08:55:12,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 08:55:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-04-01 08:55:12,798 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 08:55:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:12,854 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-04-01 08:55:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:55:12,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 31 [2023-04-01 08:55:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:12,855 INFO L225 Difference]: With dead ends: 39 [2023-04-01 08:55:12,855 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:55:12,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2023-04-01 08:55:12,856 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:12,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 52 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:55:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:55:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 08:55:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:55:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 08:55:12,861 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 31 [2023-04-01 08:55:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:12,861 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 08:55:12,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 08:55:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 08:55:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 08:55:12,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:12,862 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:55:12,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:55:13,066 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 [2023-04-01 08:55:13,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:13,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2000671596, now seen corresponding path program 2 times [2023-04-01 08:55:13,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:13,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909578706] [2023-04-01 08:55:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:13,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat