/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:59:19,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:59:19,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:59:19,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:59:19,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:59:19,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:59:19,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:59:19,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:59:19,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:59:19,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:59:19,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:59:19,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:59:19,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:59:19,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:59:19,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:59:19,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:59:19,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:59:19,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:59:19,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:59:19,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:59:19,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:59:19,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:59:19,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:59:19,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:59:19,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:59:19,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:59:19,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:59:19,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:59:19,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:59:19,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:59:19,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:59:19,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:59:19,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:59:19,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:59:19,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:59:19,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:59:19,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:59:19,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:59:19,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:59:19,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:59:19,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:59:19,957 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 04:59:19,978 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:59:19,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:59:19,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:59:19,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:59:19,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:59:19,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:59:19,980 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:59:19,980 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:59:19,980 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:59:19,980 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:59:19,981 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:59:19,981 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:59:19,981 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:59:19,981 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:59:19,981 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:59:19,981 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:59:19,981 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:59:19,981 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:59:19,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:59:19,982 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:59:19,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:59:19,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:59:19,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:59:19,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:59:19,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:59:19,983 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:59:19,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:59:19,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:59:19,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:59:19,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:59:19,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:59:19,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:59:19,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:59:20,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:59:20,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:59:20,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:59:20,193 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:59:20,193 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:59:20,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum04-2.i [2023-04-01 04:59:21,260 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:59:21,409 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:59:21,409 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum04-2.i [2023-04-01 04:59:21,413 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c224b4677/0edf7e118c424a428ebcdc4ccae672cc/FLAGcdd406de1 [2023-04-01 04:59:21,427 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c224b4677/0edf7e118c424a428ebcdc4ccae672cc [2023-04-01 04:59:21,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:59:21,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:59:21,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:59:21,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:59:21,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:59:21,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce25033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21, skipping insertion in model container [2023-04-01 04:59:21,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:59:21,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:59:21,596 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/sum04-2.i[808,821] [2023-04-01 04:59:21,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:59:21,618 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:59:21,628 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/sum04-2.i[808,821] [2023-04-01 04:59:21,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:59:21,640 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:59:21,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21 WrapperNode [2023-04-01 04:59:21,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:59:21,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:59:21,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:59:21,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:59:21,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:59:21,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:59:21,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:59:21,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:59:21,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (1/1) ... [2023-04-01 04:59:21,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:59:21,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:21,696 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 04:59:21,699 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 04:59:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:59:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:59:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:59:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 04:59:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:59:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:59:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:59:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:59:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:59:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:59:21,773 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:59:21,775 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:59:21,856 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:59:21,872 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:59:21,872 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:59:21,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:59:21 BoogieIcfgContainer [2023-04-01 04:59:21,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:59:21,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:59:21,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:59:21,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:59:21,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:59:21" (1/3) ... [2023-04-01 04:59:21,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c40b9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:59:21, skipping insertion in model container [2023-04-01 04:59:21,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:21" (2/3) ... [2023-04-01 04:59:21,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c40b9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:59:21, skipping insertion in model container [2023-04-01 04:59:21,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:59:21" (3/3) ... [2023-04-01 04:59:21,880 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2023-04-01 04:59:21,893 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:59:21,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:59:21,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:59:21,967 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;@2f7e0435, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:59:21,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:59:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-04-01 04:59:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 04:59:21,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:21,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:21,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:21,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:21,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1428912102, now seen corresponding path program 1 times [2023-04-01 04:59:21,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:21,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713138349] [2023-04-01 04:59:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:21,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:22,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:22,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713138349] [2023-04-01 04:59:22,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713138349] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:59:22,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:59:22,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:59:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329080662] [2023-04-01 04:59:22,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:59:22,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:59:22,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:22,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:59:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:59:22,169 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2023-04-01 04:59:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:22,199 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-01 04:59:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:59:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2023-04-01 04:59:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:22,212 INFO L225 Difference]: With dead ends: 29 [2023-04-01 04:59:22,212 INFO L226 Difference]: Without dead ends: 12 [2023-04-01 04:59:22,216 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 04:59:22,219 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:22,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:59:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-01 04:59:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-01 04:59:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-01 04:59:22,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-01 04:59:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:22,249 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-01 04:59:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2023-04-01 04:59:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-01 04:59:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:59:22,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:22,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:22,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:59:22,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:22,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1297056857, now seen corresponding path program 1 times [2023-04-01 04:59:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:22,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242838677] [2023-04-01 04:59:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:22,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:22,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:22,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242838677] [2023-04-01 04:59:22,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242838677] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:22,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235340459] [2023-04-01 04:59:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:22,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:22,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:22,342 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 04:59:22,343 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 04:59:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:22,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 04:59:22,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:22,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:22,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235340459] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501837288] [2023-04-01 04:59:22,492 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 04:59:22,492 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:22,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:22,499 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:22,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:22,588 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 04:59:22,638 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-01 04:59:22,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:59:22,675 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:22,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:22,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:22,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:22,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 04:59:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125470375] [2023-04-01 04:59:22,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:22,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:59:22,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:59:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-04-01 04:59:22,849 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-04-01 04:59:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:22,867 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-04-01 04:59:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:59:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 11 [2023-04-01 04:59:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:22,868 INFO L225 Difference]: With dead ends: 20 [2023-04-01 04:59:22,869 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 04:59:22,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-04-01 04:59:22,872 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:22,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:59:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 04:59:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-01 04:59:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-01 04:59:22,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-01 04:59:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:22,879 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-01 04:59:22,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-04-01 04:59:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-01 04:59:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 04:59:22,880 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:22,880 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:22,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:59:23,085 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 04:59:23,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:23,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1141144742, now seen corresponding path program 2 times [2023-04-01 04:59:23,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:23,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120140851] [2023-04-01 04:59:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:23,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:23,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120140851] [2023-04-01 04:59:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120140851] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117962105] [2023-04-01 04:59:23,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:59:23,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:23,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:23,186 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 04:59:23,190 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 04:59:23,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:59:23,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:59:23,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:59:23,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:23,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:23,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117962105] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:23,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637382458] [2023-04-01 04:59:23,301 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 04:59:23,301 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:23,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:23,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:23,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:23,334 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 04:59:23,374 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-01 04:59:23,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:59:23,392 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:23,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '311#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:23,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:23,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 04:59:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506438264] [2023-04-01 04:59:23,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:23,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 04:59:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 04:59:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-04-01 04:59:23,541 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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) [2023-04-01 04:59:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:23,555 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-04-01 04:59:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 04:59:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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 14 [2023-04-01 04:59:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:23,557 INFO L225 Difference]: With dead ends: 24 [2023-04-01 04:59:23,557 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 04:59:23,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-04-01 04:59:23,559 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:23,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:59:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 04:59:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 04:59:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-04-01 04:59:23,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2023-04-01 04:59:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:23,571 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-04-01 04:59:23,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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) [2023-04-01 04:59:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-04-01 04:59:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:59:23,572 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:23,572 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:23,589 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 04:59:23,777 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 04:59:23,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:23,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1632444774, now seen corresponding path program 3 times [2023-04-01 04:59:23,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:23,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234167583] [2023-04-01 04:59:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:23,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:24,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234167583] [2023-04-01 04:59:24,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234167583] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113557631] [2023-04-01 04:59:24,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:59:24,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:24,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:24,010 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 04:59:24,012 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 04:59:24,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:59:24,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:59:24,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 04:59:24,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:24,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:24,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113557631] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:24,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314001914] [2023-04-01 04:59:24,324 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 04:59:24,324 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:24,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:24,325 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:24,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:24,344 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 04:59:24,368 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-01 04:59:24,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:59:24,381 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:24,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '523#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:24,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:24,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-04-01 04:59:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913904063] [2023-04-01 04:59:24,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:24,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 04:59:24,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 04:59:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2023-04-01 04:59:24,616 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:24,738 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2023-04-01 04:59:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 04:59:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 04:59:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:24,739 INFO L225 Difference]: With dead ends: 25 [2023-04-01 04:59:24,739 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 04:59:24,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 04:59:24,740 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:24,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:59:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 04:59:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 04:59:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2023-04-01 04:59:24,743 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2023-04-01 04:59:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:24,743 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2023-04-01 04:59:24,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2023-04-01 04:59:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 04:59:24,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:24,744 INFO L195 NwaCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:24,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 04:59:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:24,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:24,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash -983364903, now seen corresponding path program 4 times [2023-04-01 04:59:24,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:24,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105415291] [2023-04-01 04:59:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:25,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:25,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105415291] [2023-04-01 04:59:25,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105415291] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:25,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647910286] [2023-04-01 04:59:25,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:59:25,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:25,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:25,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:59:25,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:59:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:25,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 04:59:25,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:25,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:59:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647910286] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:59:25,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:59:25,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 12 [2023-04-01 04:59:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096610531] [2023-04-01 04:59:25,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:59:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 04:59:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 04:59:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2023-04-01 04:59:25,135 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2023-04-01 04:59:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:25,148 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2023-04-01 04:59:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 04:59:25,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 19 [2023-04-01 04:59:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:25,150 INFO L225 Difference]: With dead ends: 20 [2023-04-01 04:59:25,150 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 04:59:25,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2023-04-01 04:59:25,150 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:25,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:59:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 04:59:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 04:59:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 04:59:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 04:59:25,152 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2023-04-01 04:59:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:25,152 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 04:59:25,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2023-04-01 04:59:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 04:59:25,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 04:59:25,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 04:59:25,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:59:25,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:25,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 04:59:25,414 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2023-04-01 04:59:25,414 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 12) no Hoare annotation was computed. [2023-04-01 04:59:25,414 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 22 28) no Hoare annotation was computed. [2023-04-01 04:59:25,414 INFO L895 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= main_~sn~0 16) (<= 9 main_~i~0) (< 15 main_~sn~0)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= main_~i~0 4) (<= 4 main_~i~0)) (and (= main_~sn~0 0) (= main_~i~0 1)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14)) (and (<= 4 main_~sn~0) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= main_~sn~0 10) (<= 10 main_~sn~0) (< main_~i~0 7) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= main_~i~0 2) (<= 2 main_~sn~0)) (and (< main_~i~0 8) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= 7 main_~i~0)) (and (<= main_~i~0 5) (<= 8 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 8))) [2023-04-01 04:59:25,414 INFO L895 garLoopResultBuilder]: At program point L24-4(lines 24 26) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 22 28) no Hoare annotation was computed. [2023-04-01 04:59:25,415 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 22 28) the Hoare annotation is: true [2023-04-01 04:59:25,415 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-01 04:59:25,415 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-01 04:59:25,415 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2023-04-01 04:59:25,415 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 19) the Hoare annotation is: true [2023-04-01 04:59:25,415 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2023-04-01 04:59:25,417 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1] [2023-04-01 04:59:25,419 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 04:59:25,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 04:59:25 BoogieIcfgContainer [2023-04-01 04:59:25,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 04:59:25,430 INFO L158 Benchmark]: Toolchain (without parser) took 4000.02ms. Allocated memory is still 228.6MB. Free memory was 185.0MB in the beginning and 186.7MB in the end (delta: -1.6MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:59:25,430 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 170.9MB. Free memory is still 125.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:59:25,430 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.34ms. Allocated memory is still 228.6MB. Free memory was 185.0MB in the beginning and 174.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 04:59:25,430 INFO L158 Benchmark]: Boogie Preprocessor took 21.65ms. Allocated memory is still 228.6MB. Free memory was 174.9MB in the beginning and 173.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 04:59:25,430 INFO L158 Benchmark]: RCFGBuilder took 210.10ms. Allocated memory is still 228.6MB. Free memory was 173.6MB in the beginning and 162.4MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 04:59:25,431 INFO L158 Benchmark]: TraceAbstraction took 3554.08ms. Allocated memory is still 228.6MB. Free memory was 161.8MB in the beginning and 186.7MB in the end (delta: -24.9MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:59:25,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 170.9MB. Free memory is still 125.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.34ms. Allocated memory is still 228.6MB. Free memory was 185.0MB in the beginning and 174.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.65ms. Allocated memory is still 228.6MB. Free memory was 174.9MB in the beginning and 173.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 210.10ms. Allocated memory is still 228.6MB. Free memory was 173.6MB in the beginning and 162.4MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3554.08ms. Allocated memory is still 228.6MB. Free memory was 161.8MB in the beginning and 186.7MB in the end (delta: -24.9MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.5s, OverallIterations: 5, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 168 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 127 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 290 IncrementalHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 41 mSDtfsCounter, 290 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=4, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 21 NumberOfFragments, 121 HoareAnnotationTreeSize, 11 FomulaSimplifications, 9 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 449 SizeOfPredicates, 1 NumberOfNonLiveVariables, 302 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 82/231 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((sn <= 16 && 9 <= i) && 15 < sn) || (((6 <= sn && sn <= 6) && i <= 4) && 4 <= i)) || (sn == 0 && i == 1)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14)) || (((4 <= sn && sn <= 4) && 3 <= i) && i <= 3)) || (((sn <= 10 && 10 <= sn) && i < 7) && 6 <= i)) || (((2 <= i && sn <= 2) && i <= 2) && 2 <= sn)) || (((i < 8 && 12 <= sn) && sn <= 12) && 7 <= i)) || (((i <= 5 && 8 <= sn) && 5 <= i) && sn <= 8) RESULT: Ultimate proved your program to be correct! [2023-04-01 04:59:25,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...