/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/array-fpi/ms5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:01:32,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:01:32,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:01:32,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:01:32,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:01:32,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:01:32,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:01:32,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:01:32,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:01:32,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:01:32,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:01:32,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:01:32,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:01:32,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:01:32,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:01:32,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:01:32,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:01:32,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:01:32,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:01:32,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:01:32,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:01:32,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:01:32,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:01:32,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:01:32,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:01:32,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:01:32,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:01:32,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:01:32,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:01:32,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:01:32,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:01:32,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:01:32,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:01:32,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:01:32,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:01:32,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:01:32,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:01:32,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:01:32,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:01:32,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:01:32,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:01:32,962 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 21:01:32,981 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:01:32,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:01:32,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:01:32,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:01:32,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:01:32,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:01:32,983 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:01:32,983 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:01:32,983 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:01:32,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:01:32,983 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:01:32,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:01:32,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:01:32,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:01:32,984 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:01:32,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:01:32,985 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:01:32,985 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:01:32,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:01:32,985 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:01:32,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:01:32,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:01:32,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:01:32,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:01:32,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:01:32,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:01:32,987 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:01:32,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:01:32,987 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:01:32,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:01:32,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:01:32,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:01:32,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:01:32,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:01:32,988 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:01:32,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:01:32,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:01:32,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:01:32,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:01:32,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:01:32,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:01:32,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:01:33,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:01:33,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:01:33,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:01:33,272 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:01:33,273 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:01:33,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms5.c [2023-03-31 21:01:34,499 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:01:34,692 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:01:34,693 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms5.c [2023-03-31 21:01:34,697 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4185081/b665c18c1f324401916a9a0af1c0c795/FLAGab17707ec [2023-03-31 21:01:34,710 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4185081/b665c18c1f324401916a9a0af1c0c795 [2023-03-31 21:01:34,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:01:34,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:01:34,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:01:34,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:01:34,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:01:34,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52f03413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34, skipping insertion in model container [2023-03-31 21:01:34,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:01:34,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:01:34,857 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms5.c[586,599] [2023-03-31 21:01:34,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:01:34,891 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:01:34,904 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms5.c[586,599] [2023-03-31 21:01:34,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:01:34,929 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:01:34,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34 WrapperNode [2023-03-31 21:01:34,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:01:34,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:01:34,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:01:34,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:01:34,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,975 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:01:34,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:01:34,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:01:34,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:01:34,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (1/1) ... [2023-03-31 21:01:34,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:01:34,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:01:35,018 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 21:01:35,025 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 21:01:35,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:01:35,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:01:35,054 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:01:35,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 21:01:35,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 21:01:35,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:01:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:01:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:01:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:01:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:01:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 21:01:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 21:01:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:01:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 21:01:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:01:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 21:01:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 21:01:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:01:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:01:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:01:35,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:01:35,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:01:35,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:01:35,124 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:01:35,125 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:01:35,263 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:01:35,310 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:01:35,311 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 21:01:35,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:01:35 BoogieIcfgContainer [2023-03-31 21:01:35,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:01:35,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:01:35,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:01:35,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:01:35,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:01:34" (1/3) ... [2023-03-31 21:01:35,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5310ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:01:35, skipping insertion in model container [2023-03-31 21:01:35,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:34" (2/3) ... [2023-03-31 21:01:35,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5310ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:01:35, skipping insertion in model container [2023-03-31 21:01:35,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:01:35" (3/3) ... [2023-03-31 21:01:35,322 INFO L112 eAbstractionObserver]: Analyzing ICFG ms5.c [2023-03-31 21:01:35,334 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:01:35,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:01:35,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:01:35,378 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;@53f8ccc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:01:35,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:01:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 21:01:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 21:01:35,388 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:01:35,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:01:35,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:01:35,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:01:35,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2020821576, now seen corresponding path program 1 times [2023-03-31 21:01:35,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:01:35,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448134188] [2023-03-31 21:01:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:35,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:01:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:01:35,792 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 21:01:35,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:01:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448134188] [2023-03-31 21:01:35,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448134188] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:01:35,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:01:35,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 21:01:35,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521875068] [2023-03-31 21:01:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:01:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 21:01:35,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:01:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 21:01:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:01:35,861 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:01:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:01:35,981 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-03-31 21:01:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 21:01:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-03-31 21:01:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:01:35,991 INFO L225 Difference]: With dead ends: 43 [2023-03-31 21:01:35,991 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 21:01:35,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:01:36,000 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:01:36,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:01:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 21:01:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-31 21:01:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:01:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-03-31 21:01:36,043 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2023-03-31 21:01:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:01:36,046 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-03-31 21:01:36,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:01:36,046 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-03-31 21:01:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 21:01:36,047 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:01:36,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:01:36,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:01:36,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:01:36,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:01:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash 358574091, now seen corresponding path program 1 times [2023-03-31 21:01:36,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:01:36,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378427721] [2023-03-31 21:01:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:36,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:01:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:01:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 21:01:36,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:01:36,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378427721] [2023-03-31 21:01:36,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378427721] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:01:36,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613593298] [2023-03-31 21:01:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:36,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:01:36,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:01:36,485 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 21:01:36,490 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 21:01:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:01:36,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 21:01:36,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:01:36,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 21:01:36,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-31 21:01:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 21:01:36,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:01:36,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:01:36,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-03-31 21:01:36,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:01:36,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-03-31 21:01:37,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-03-31 21:01:37,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-03-31 21:01:37,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-03-31 21:01:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 21:01:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613593298] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:01:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995453769] [2023-03-31 21:01:37,132 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:01:37,132 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:01:37,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:01:37,143 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:01:37,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:01:37,242 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:01:37,446 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:01:37,466 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:01:37,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:01:37,484 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:01:38,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (<= 0 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_1|) (< (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0)))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:01:38,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:01:38,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:01:38,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-03-31 21:01:38,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890710568] [2023-03-31 21:01:38,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:01:38,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 21:01:38,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:01:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 21:01:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-03-31 21:01:38,053 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 21:01:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:01:38,215 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-03-31 21:01:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 21:01:38,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-03-31 21:01:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:01:38,217 INFO L225 Difference]: With dead ends: 25 [2023-03-31 21:01:38,217 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 21:01:38,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 21:01:38,222 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:01:38,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 61 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:01:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 21:01:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 21:01:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:01:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-03-31 21:01:38,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2023-03-31 21:01:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:01:38,229 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-03-31 21:01:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 21:01:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-03-31 21:01:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 21:01:38,230 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:01:38,230 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:01:38,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 21:01:38,437 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 21:01:38,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:01:38,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:01:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1813973195, now seen corresponding path program 2 times [2023-03-31 21:01:38,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:01:38,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946276572] [2023-03-31 21:01:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:38,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:01:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:01:38,538 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 21:01:38,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:01:38,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946276572] [2023-03-31 21:01:38,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946276572] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:01:38,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796089930] [2023-03-31 21:01:38,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:01:38,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:01:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:01:38,542 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 21:01:38,544 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 21:01:38,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 21:01:38,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:01:38,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:01:38,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:01:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:01:38,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:01:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:01:38,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796089930] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:01:38,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005528154] [2023-03-31 21:01:38,695 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:01:38,695 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:01:38,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:01:38,696 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:01:38,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:01:38,742 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:01:38,880 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:01:38,893 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:01:38,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:01:38,906 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:01:39,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '455#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_2| Int)) (and (< (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0)) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:01:39,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:01:39,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:01:39,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-03-31 21:01:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873648756] [2023-03-31 21:01:39,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:01:39,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 21:01:39,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:01:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 21:01:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-03-31 21:01:39,354 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:01:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:01:39,396 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-03-31 21:01:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:01:39,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-03-31 21:01:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:01:39,398 INFO L225 Difference]: With dead ends: 29 [2023-03-31 21:01:39,398 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 21:01:39,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-03-31 21:01:39,399 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:01:39,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:01:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 21:01:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 21:01:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:01:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-03-31 21:01:39,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-03-31 21:01:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:01:39,404 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-03-31 21:01:39,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:01:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-03-31 21:01:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 21:01:39,405 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:01:39,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:01:39,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:01:39,611 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 [2023-03-31 21:01:39,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:01:39,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:01:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash -914074792, now seen corresponding path program 3 times [2023-03-31 21:01:39,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:01:39,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773997901] [2023-03-31 21:01:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:39,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:01:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:01:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:01:40,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:01:40,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773997901] [2023-03-31 21:01:40,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773997901] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:01:40,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057199632] [2023-03-31 21:01:40,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:01:40,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:01:40,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:01:40,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:01:40,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:01:40,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:01:40,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:01:40,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 21:01:40,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:01:40,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-03-31 21:01:40,571 INFO L321 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2023-03-31 21:01:40,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 40 [2023-03-31 21:01:45,820 INFO L321 Elim1Store]: treesize reduction 62, result has 56.9 percent of original size [2023-03-31 21:01:45,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 156 [2023-03-31 21:02:24,422 WARN L223 SmtUtils]: Spent 35.33s on a formula simplification. DAG size of input: 129 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 21:02:25,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:02:25,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 376 treesize of output 1167