/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/loops/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:58:33,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:58:33,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:58:33,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:58:33,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:58:33,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:58:33,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:58:33,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:58:33,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:58:33,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:58:33,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:58:33,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:58:33,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:58:33,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:58:33,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:58:33,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:58:33,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:58:33,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:58:33,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:58:33,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:58:33,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:58:33,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:58:33,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:58:33,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:58:33,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:58:33,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:58:33,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:58:33,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:58:33,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:58:33,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:58:33,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:58:33,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:58:33,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:58:33,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:58:33,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:58:33,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:58:33,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:58:33,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:58:33,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:58:33,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:58:33,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:58:33,967 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 22:58:33,995 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:58:33,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:58:33,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:58:33,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:58:33,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:58:33,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:58:33,997 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:58:33,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:58:33,997 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:58:33,997 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:58:33,998 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:58:33,998 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:58:33,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:58:33,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:58:33,999 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:58:33,999 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:58:33,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:58:33,999 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:58:33,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:58:34,000 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:58:34,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:58:34,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:58:34,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:58:34,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:58:34,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:58:34,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:58:34,001 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:58:34,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:58:34,001 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:58:34,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:58:34,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:58:34,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:58:34,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:58:34,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:58:34,002 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:58:34,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:58:34,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:58:34,002 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:58:34,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:58:34,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:58:34,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:58:34,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:58:34,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:58:34,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:58:34,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:58:34,246 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:58:34,246 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:58:34,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum03-1.i [2023-03-31 22:58:35,388 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:58:35,576 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:58:35,576 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum03-1.i [2023-03-31 22:58:35,582 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24bd6f1df/099b5c4b97f74f8cb2375596799d34f0/FLAGde716c2c2 [2023-03-31 22:58:35,596 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24bd6f1df/099b5c4b97f74f8cb2375596799d34f0 [2023-03-31 22:58:35,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:58:35,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:58:35,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:58:35,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:58:35,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:58:35,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77dd21db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35, skipping insertion in model container [2023-03-31 22:58:35,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:58:35,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:58:35,765 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/loops/sum03-1.i[807,820] [2023-03-31 22:58:35,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:58:35,789 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:58:35,799 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/loops/sum03-1.i[807,820] [2023-03-31 22:58:35,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:58:35,812 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:58:35,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35 WrapperNode [2023-03-31 22:58:35,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:58:35,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:58:35,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:58:35,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:58:35,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:58:35,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:58:35,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:58:35,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:58:35,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (1/1) ... [2023-03-31 22:58:35,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:58:35,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:35,866 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 22:58:35,873 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 22:58:35,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:58:35,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:58:35,900 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:58:35,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 22:58:35,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:58:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:58:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:58:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:58:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:58:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:58:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:58:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 22:58:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 22:58:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:58:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:58:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:58:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:58:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:58:35,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:58:35,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:58:35,964 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:58:35,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:58:36,070 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:58:36,097 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:58:36,097 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:58:36,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:58:36 BoogieIcfgContainer [2023-03-31 22:58:36,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:58:36,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:58:36,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:58:36,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:58:36,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:58:35" (1/3) ... [2023-03-31 22:58:36,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309dbf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:58:36, skipping insertion in model container [2023-03-31 22:58:36,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:35" (2/3) ... [2023-03-31 22:58:36,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309dbf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:58:36, skipping insertion in model container [2023-03-31 22:58:36,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:58:36" (3/3) ... [2023-03-31 22:58:36,107 INFO L112 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2023-03-31 22:58:36,122 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:58:36,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:58:36,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:58:36,167 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;@3b45d4d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:58:36,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:58:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-03-31 22:58:36,177 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:36,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:36,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:36,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1588842388, now seen corresponding path program 1 times [2023-03-31 22:58:36,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:36,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342798743] [2023-03-31 22:58:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:36,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:36,919 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 22:58:36,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:36,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342798743] [2023-03-31 22:58:36,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342798743] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:58:36,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:58:36,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 22:58:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312620183] [2023-03-31 22:58:36,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:58:36,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 22:58:36,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 22:58:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:58:36,967 INFO L87 Difference]: Start difference. First operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:37,123 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2023-03-31 22:58:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:58:37,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-03-31 22:58:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:37,132 INFO L225 Difference]: With dead ends: 31 [2023-03-31 22:58:37,132 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 22:58:37,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:58:37,141 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:37,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:58:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 22:58:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-03-31 22:58:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-03-31 22:58:37,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2023-03-31 22:58:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:37,171 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-03-31 22:58:37,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-03-31 22:58:37,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 22:58:37,172 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:37,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:37,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:58:37,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:37,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1442517707, now seen corresponding path program 1 times [2023-03-31 22:58:37,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:37,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165232404] [2023-03-31 22:58:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:37,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:37,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165232404] [2023-03-31 22:58:37,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165232404] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063774898] [2023-03-31 22:58:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:37,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:37,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:37,598 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 22:58:37,600 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 22:58:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:37,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-31 22:58:37,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:37,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:38,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063774898] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519710853] [2023-03-31 22:58:38,324 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 22:58:38,324 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:38,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:38,331 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:38,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:38,394 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 22:58:38,564 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-03-31 22:58:38,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:58:38,616 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:38,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '208#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:58:38,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:38,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:38,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-03-31 22:58:38,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647995202] [2023-03-31 22:58:38,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:38,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 22:58:38,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 22:58:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-03-31 22:58:38,951 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:58:43,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:43,130 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-03-31 22:58:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 22:58:43,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2023-03-31 22:58:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:43,134 INFO L225 Difference]: With dead ends: 34 [2023-03-31 22:58:43,134 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 22:58:43,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-03-31 22:58:43,136 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:43,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-31 22:58:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 22:58:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-03-31 22:58:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:58:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-03-31 22:58:43,154 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2023-03-31 22:58:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:43,154 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-03-31 22:58:43,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:58:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-03-31 22:58:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 22:58:43,156 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:43,156 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:43,165 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 22:58:43,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:43,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:43,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:43,362 INFO L85 PathProgramCache]: Analyzing trace with hash 507370439, now seen corresponding path program 2 times [2023-03-31 22:58:43,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:43,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104080519] [2023-03-31 22:58:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:43,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:58:44,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104080519] [2023-03-31 22:58:44,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104080519] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:44,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763754076] [2023-03-31 22:58:44,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:58:44,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:44,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:44,056 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 22:58:44,059 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 22:58:44,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-31 22:58:44,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:58:44,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 43 conjunts are in the unsatisfiable core [2023-03-31 22:58:44,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 22:58:44,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 22:58:52,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763754076] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:52,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [833296199] [2023-03-31 22:58:52,575 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 22:58:52,575 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:52,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:52,576 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:52,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:52,589 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 22:58:52,660 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-03-31 22:58:52,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:58:52,716 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:53,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '590#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:58:53,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:53,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:53,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14] total 26 [2023-03-31 22:58:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521866136] [2023-03-31 22:58:53,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 22:58:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 22:58:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 22:58:53,280 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-03-31 22:59:12,475 WARN L223 SmtUtils]: Spent 12.83s on a formula simplification. DAG size of input: 88 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 22:59:26,873 WARN L223 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 75 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 22:59:36,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 22:59:42,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []