/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/sina2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:04:03,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:04:03,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:04:03,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:04:03,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:04:03,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:04:03,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:04:03,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:04:03,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:04:03,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:04:03,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:04:03,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:04:03,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:04:03,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:04:03,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:04:03,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:04:03,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:04:03,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:04:03,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:04:03,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:04:03,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:04:03,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:04:03,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:04:03,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:04:03,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:04:03,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:04:03,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:04:03,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:04:03,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:04:03,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:04:03,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:04:03,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:04:03,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:04:03,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:04:03,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:04:03,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:04:03,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:04:03,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:04:03,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:04:03,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:04:03,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:04:03,931 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 21:04:03,943 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:04:03,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:04:03,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:04:03,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:04:03,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:04:03,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:04:03,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:04:03,945 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:04:03,945 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:04:03,946 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:04:03,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:04:03,946 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:04:03,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:04:03,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:04:03,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:04:03,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:04:03,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:04:03,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:04:03,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:04:03,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:04:03,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:04:03,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:04:03,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:04:03,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:04:03,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:04:03,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:04:04,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:04:04,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:04:04,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:04:04,133 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:04:04,134 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:04:04,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sina2.c [2023-03-31 21:04:05,096 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:04:05,303 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:04:05,304 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina2.c [2023-03-31 21:04:05,308 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d1a7a28/34ab84979f16467aa015872af27267e6/FLAG83518867e [2023-03-31 21:04:05,318 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d1a7a28/34ab84979f16467aa015872af27267e6 [2023-03-31 21:04:05,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:04:05,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:04:05,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:04:05,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:04:05,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:04:05,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f55367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05, skipping insertion in model container [2023-03-31 21:04:05,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:04:05,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:04:05,441 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/sina2.c[588,601] [2023-03-31 21:04:05,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:04:05,462 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:04:05,472 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/sina2.c[588,601] [2023-03-31 21:04:05,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:04:05,491 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:04:05,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05 WrapperNode [2023-03-31 21:04:05,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:04:05,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:04:05,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:04:05,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:04:05,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,526 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:04:05,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:04:05,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:04:05,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:04:05,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (1/1) ... [2023-03-31 21:04:05,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:04:05,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:05,578 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 21:04:05,584 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 21:04:05,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:04:05,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:04:05,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:04:05,605 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 21:04:05,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 21:04:05,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:04:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:04:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:04:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:04:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:04:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:04:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:04:05,676 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:04:05,677 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:04:05,878 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:04:05,916 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:04:05,917 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 21:04:05,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:04:05 BoogieIcfgContainer [2023-03-31 21:04:05,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:04:05,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:04:05,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:04:05,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:04:05,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:04:05" (1/3) ... [2023-03-31 21:04:05,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c748928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:04:05, skipping insertion in model container [2023-03-31 21:04:05,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:05" (2/3) ... [2023-03-31 21:04:05,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c748928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:04:05, skipping insertion in model container [2023-03-31 21:04:05,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:04:05" (3/3) ... [2023-03-31 21:04:05,930 INFO L112 eAbstractionObserver]: Analyzing ICFG sina2.c [2023-03-31 21:04:05,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:04:05,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:04:05,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:04:05,978 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;@6854d9a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:04:05,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:04:05,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 21:04:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 21:04:05,985 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:05,986 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 21:04:05,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:05,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1980830275, now seen corresponding path program 1 times [2023-03-31 21:04:05,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:05,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488282233] [2023-03-31 21:04:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:05,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:06,254 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 21:04:06,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488282233] [2023-03-31 21:04:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488282233] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:04:06,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:04:06,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 21:04:06,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683181776] [2023-03-31 21:04:06,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:04:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 21:04:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:06,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 21:04:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:04:06,294 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 21:04:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:06,379 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-03-31 21:04:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 21:04:06,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2023-03-31 21:04:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:06,386 INFO L225 Difference]: With dead ends: 51 [2023-03-31 21:04:06,386 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 21:04:06,388 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 21:04:06,390 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:06,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 39 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:04:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 21:04:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-03-31 21:04:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:04:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-03-31 21:04:06,432 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2023-03-31 21:04:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:06,432 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-03-31 21:04:06,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 21:04:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-03-31 21:04:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 21:04:06,433 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:06,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:06,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:04:06,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:06,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash -33805627, now seen corresponding path program 1 times [2023-03-31 21:04:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:06,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726565351] [2023-03-31 21:04:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:06,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:07,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:07,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726565351] [2023-03-31 21:04:07,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726565351] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:07,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74137800] [2023-03-31 21:04:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:07,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:07,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:07,492 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 21:04:07,518 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 21:04:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:07,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 43 conjunts are in the unsatisfiable core [2023-03-31 21:04:07,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:07,666 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 21:04:07,674 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 10 treesize of output 8 [2023-03-31 21:04:07,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 21:04:07,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-03-31 21:04:07,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-03-31 21:04:07,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-03-31 21:04:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:07,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:08,177 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:08,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74137800] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143788791] [2023-03-31 21:04:08,228 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:08,228 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:08,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:08,239 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:08,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:08,311 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:08,392 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:08,399 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:08,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:08,410 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:08,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '296#(and (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0)))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:08,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:08,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2023-03-31 21:04:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607184064] [2023-03-31 21:04:08,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:08,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-31 21:04:08,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-31 21:04:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2023-03-31 21:04:08,955 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 27 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 21:04:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:09,415 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-03-31 21:04:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 21:04:09,415 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-03-31 21:04:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:09,416 INFO L225 Difference]: With dead ends: 47 [2023-03-31 21:04:09,416 INFO L226 Difference]: Without dead ends: 45 [2023-03-31 21:04:09,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2023-03-31 21:04:09,418 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:09,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 108 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:04:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-03-31 21:04:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2023-03-31 21:04:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 21:04:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-03-31 21:04:09,425 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 21 [2023-03-31 21:04:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:09,426 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-03-31 21:04:09,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 21:04:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-03-31 21:04:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 21:04:09,426 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:09,427 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:09,444 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 21:04:09,633 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 21:04:09,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:09,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:09,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1772424985, now seen corresponding path program 2 times [2023-03-31 21:04:09,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:09,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331991196] [2023-03-31 21:04:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 21:04:09,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:09,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331991196] [2023-03-31 21:04:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331991196] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:09,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794916694] [2023-03-31 21:04:09,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:04:09,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:09,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:09,687 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 21:04:09,709 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 21:04:09,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 21:04:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:09,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:04:09,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 21:04:09,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 21:04:09,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794916694] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619254157] [2023-03-31 21:04:09,809 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:09,810 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:09,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:09,810 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:09,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:09,832 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:09,898 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:09,904 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:09,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:09,911 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:10,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '604#(and (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:10,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:10,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:10,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-03-31 21:04:10,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90997112] [2023-03-31 21:04:10,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:10,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 21:04:10,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 21:04:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-03-31 21:04:10,275 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 21:04:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:10,410 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-03-31 21:04:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 21:04:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 22 [2023-03-31 21:04:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:10,412 INFO L225 Difference]: With dead ends: 64 [2023-03-31 21:04:10,412 INFO L226 Difference]: Without dead ends: 53 [2023-03-31 21:04:10,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-03-31 21:04:10,413 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:10,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 87 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:04:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-03-31 21:04:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2023-03-31 21:04:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 21:04:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-03-31 21:04:10,421 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 22 [2023-03-31 21:04:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:10,421 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-03-31 21:04:10,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 21:04:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-03-31 21:04:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 21:04:10,422 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:10,422 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:10,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 21:04:10,627 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 21:04:10,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:10,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash 750675813, now seen corresponding path program 3 times [2023-03-31 21:04:10,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:10,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615064203] [2023-03-31 21:04:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:10,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 21:04:10,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:10,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615064203] [2023-03-31 21:04:10,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615064203] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:10,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755073679] [2023-03-31 21:04:10,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:04:10,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:10,710 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 21:04:10,711 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 21:04:10,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:04:10,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:10,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:04:10,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 21:04:10,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 21:04:10,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755073679] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:10,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371259777] [2023-03-31 21:04:10,800 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:10,800 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:10,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:10,800 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:10,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:10,820 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:10,882 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:10,889 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:10,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:10,898 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:11,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '942#(and (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_3 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_3) 0)))) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:11,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:11,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:11,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2023-03-31 21:04:11,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039461383] [2023-03-31 21:04:11,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:11,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 21:04:11,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 21:04:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-03-31 21:04:11,273 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 21:04:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:11,348 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-03-31 21:04:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:04:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 23 [2023-03-31 21:04:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:11,349 INFO L225 Difference]: With dead ends: 66 [2023-03-31 21:04:11,349 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 21:04:11,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2023-03-31 21:04:11,350 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:11,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:04:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 21:04:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-03-31 21:04:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:04:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-03-31 21:04:11,355 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2023-03-31 21:04:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:11,355 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-03-31 21:04:11,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 21:04:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-03-31 21:04:11,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 21:04:11,355 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:11,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:11,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:11,560 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 [2023-03-31 21:04:11,561 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:11,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash -147761795, now seen corresponding path program 4 times [2023-03-31 21:04:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:11,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951460696] [2023-03-31 21:04:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:11,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:12,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:12,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951460696] [2023-03-31 21:04:12,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951460696] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:12,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942452730] [2023-03-31 21:04:12,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 21:04:12,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:12,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:12,253 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) [2023-03-31 21:04:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 21:04:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:12,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 64 conjunts are in the unsatisfiable core [2023-03-31 21:04:12,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:12,376 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 21:04:12,381 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 10 treesize of output 8 [2023-03-31 21:04:12,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 21:04:12,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-03-31 21:04:12,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-31 21:04:12,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2023-03-31 21:04:12,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2023-03-31 21:04:12,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2023-03-31 21:04:12,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-03-31 21:04:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:12,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:13,215 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:13,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942452730] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:13,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370380137] [2023-03-31 21:04:13,234 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:13,234 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:13,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:13,234 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:13,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:13,263 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:13,312 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:13,317 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:13,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:13,324 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:13,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1291#(and (exists ((v_main_~a~0.base_BEFORE_CALL_4 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_4) 0)))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:13,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:13,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:13,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 38 [2023-03-31 21:04:13,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793704485] [2023-03-31 21:04:13,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:13,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-03-31 21:04:13,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-03-31 21:04:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2550, Unknown=0, NotChecked=0, Total=2756 [2023-03-31 21:04:13,989 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 38 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:04:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:16,841 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-03-31 21:04:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-31 21:04:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-03-31 21:04:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:16,843 INFO L225 Difference]: With dead ends: 60 [2023-03-31 21:04:16,843 INFO L226 Difference]: Without dead ends: 58 [2023-03-31 21:04:16,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=391, Invalid=4439, Unknown=0, NotChecked=0, Total=4830 [2023-03-31 21:04:16,846 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:16,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 151 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 21:04:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-03-31 21:04:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2023-03-31 21:04:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 21:04:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-03-31 21:04:16,869 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 24 [2023-03-31 21:04:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:16,869 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-03-31 21:04:16,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:04:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-03-31 21:04:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 21:04:16,870 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:16,870 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:16,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:17,075 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 [2023-03-31 21:04:17,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:17,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:17,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1948533787, now seen corresponding path program 5 times [2023-03-31 21:04:17,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:17,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825943767] [2023-03-31 21:04:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:17,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:04:17,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825943767] [2023-03-31 21:04:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825943767] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271113995] [2023-03-31 21:04:17,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:04:17,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:17,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:04:17,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 21:04:17,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 21:04:17,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:17,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:04:17,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:04:17,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:04:17,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271113995] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:17,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94275713] [2023-03-31 21:04:17,316 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:17,316 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:17,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:17,316 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:17,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:17,334 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:17,397 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:17,402 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:17,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:17,408 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:17,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1674#(and (<= ~N~0 2147483647) (exists ((v_main_~a~0.base_BEFORE_CALL_5 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_5) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:17,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:17,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:17,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-03-31 21:04:17,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220738456] [2023-03-31 21:04:17,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:17,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 21:04:17,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 21:04:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2023-03-31 21:04:17,671 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 21:04:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:17,872 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-03-31 21:04:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 21:04:17,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 25 [2023-03-31 21:04:17,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:17,875 INFO L225 Difference]: With dead ends: 83 [2023-03-31 21:04:17,875 INFO L226 Difference]: Without dead ends: 71 [2023-03-31 21:04:17,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 21:04:17,877 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:17,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 136 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:04:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-03-31 21:04:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2023-03-31 21:04:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 21:04:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-03-31 21:04:17,897 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2023-03-31 21:04:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:17,897 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-03-31 21:04:17,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 21:04:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-03-31 21:04:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 21:04:17,898 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:17,898 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:17,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 21:04:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:18,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:18,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1270109593, now seen corresponding path program 6 times [2023-03-31 21:04:18,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:18,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322506269] [2023-03-31 21:04:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:18,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:18,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:18,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322506269] [2023-03-31 21:04:18,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322506269] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:18,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187401504] [2023-03-31 21:04:18,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:04:18,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:18,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:18,185 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:04:18,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 21:04:18,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:04:18,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:18,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:04:18,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:18,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187401504] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:18,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517186207] [2023-03-31 21:04:18,346 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:18,346 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:18,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:18,347 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:18,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:18,370 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:18,418 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:18,423 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:18,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:18,431 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:18,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2078#(and (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_6 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_6) 0)))) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:18,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:18,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:18,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-03-31 21:04:18,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920617812] [2023-03-31 21:04:18,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:18,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 21:04:18,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 21:04:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-03-31 21:04:18,845 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 21:04:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:18,963 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2023-03-31 21:04:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:04:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 26 [2023-03-31 21:04:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:18,963 INFO L225 Difference]: With dead ends: 79 [2023-03-31 21:04:18,964 INFO L226 Difference]: Without dead ends: 55 [2023-03-31 21:04:18,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-03-31 21:04:18,964 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:18,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 80 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:04:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-31 21:04:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2023-03-31 21:04:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 21:04:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-03-31 21:04:18,975 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 26 [2023-03-31 21:04:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:18,975 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-03-31 21:04:18,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 21:04:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-03-31 21:04:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 21:04:18,976 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:18,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:18,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:19,181 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:19,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1069717115, now seen corresponding path program 7 times [2023-03-31 21:04:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735885111] [2023-03-31 21:04:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:20,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:20,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735885111] [2023-03-31 21:04:20,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735885111] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:20,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755111372] [2023-03-31 21:04:20,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 21:04:20,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:20,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:20,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:04:20,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 21:04:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:20,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 80 conjunts are in the unsatisfiable core [2023-03-31 21:04:20,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:20,354 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 21:04:20,361 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 10 treesize of output 8 [2023-03-31 21:04:20,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 21:04:20,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-03-31 21:04:20,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-03-31 21:04:20,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:20,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:20,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:20,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:20,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:20,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-31 21:04:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:20,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:21,869 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:21,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755111372] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:21,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657056881] [2023-03-31 21:04:21,890 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:21,891 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:21,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:21,891 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:21,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:21,910 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:21,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:21,968 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:21,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:21,973 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:22,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2513#(and (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (exists ((v_main_~a~0.base_BEFORE_CALL_7 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_7) 0)))) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:22,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:22,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:22,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 18] total 48 [2023-03-31 21:04:22,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837545601] [2023-03-31 21:04:22,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:22,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-03-31 21:04:22,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:22,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-03-31 21:04:22,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=3637, Unknown=0, NotChecked=0, Total=3906 [2023-03-31 21:04:22,821 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:04:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:33,560 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-03-31 21:04:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-03-31 21:04:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-03-31 21:04:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:33,561 INFO L225 Difference]: With dead ends: 82 [2023-03-31 21:04:33,561 INFO L226 Difference]: Without dead ends: 80 [2023-03-31 21:04:33,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=531, Invalid=6275, Unknown=0, NotChecked=0, Total=6806 [2023-03-31 21:04:33,564 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:33,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 253 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-31 21:04:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-03-31 21:04:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2023-03-31 21:04:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 21:04:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-03-31 21:04:33,591 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 27 [2023-03-31 21:04:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:33,591 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-03-31 21:04:33,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:04:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-03-31 21:04:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 21:04:33,594 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:33,594 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:33,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:33,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:33,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:33,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash 847482407, now seen corresponding path program 8 times [2023-03-31 21:04:33,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:33,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438078908] [2023-03-31 21:04:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:33,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:33,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438078908] [2023-03-31 21:04:33,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438078908] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:33,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732329998] [2023-03-31 21:04:33,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:04:33,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:33,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:04:33,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 21:04:34,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 21:04:34,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:34,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 21:04:34,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:34,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:34,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732329998] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:34,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311638539] [2023-03-31 21:04:34,122 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:34,123 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:34,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:34,123 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:34,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:34,140 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:34,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:34,193 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:34,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:34,200 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:34,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2994#(and (<= ~N~0 2147483647) (exists ((v_main_~a~0.base_BEFORE_CALL_8 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_8) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:34,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:34,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:34,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-03-31 21:04:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474129915] [2023-03-31 21:04:34,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:34,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 21:04:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 21:04:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2023-03-31 21:04:34,630 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 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 21:04:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:34,944 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2023-03-31 21:04:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 21:04:34,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 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 28 [2023-03-31 21:04:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:34,945 INFO L225 Difference]: With dead ends: 109 [2023-03-31 21:04:34,945 INFO L226 Difference]: Without dead ends: 96 [2023-03-31 21:04:34,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2023-03-31 21:04:34,946 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:34,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 158 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:04:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-03-31 21:04:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2023-03-31 21:04:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.16) internal successors, (58), 52 states have internal predecessors, (58), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 21:04:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-03-31 21:04:34,965 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 28 [2023-03-31 21:04:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:34,966 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-03-31 21:04:34,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 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 21:04:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-03-31 21:04:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 21:04:34,966 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:34,966 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:34,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-31 21:04:35,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-03-31 21:04:35,171 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:35,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1001380123, now seen corresponding path program 9 times [2023-03-31 21:04:35,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:35,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368913922] [2023-03-31 21:04:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:35,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 21:04:35,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368913922] [2023-03-31 21:04:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368913922] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917978000] [2023-03-31 21:04:35,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:04:35,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:35,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:35,275 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:04:35,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 21:04:35,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:04:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:35,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 21:04:35,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 21:04:35,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 21:04:35,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917978000] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:35,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553650876] [2023-03-31 21:04:35,441 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:35,441 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:35,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:35,442 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:35,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:35,459 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:35,501 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:35,506 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:35,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:35,512 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:35,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3501#(and (<= ~N~0 2147483647) (exists ((v_main_~a~0.base_BEFORE_CALL_9 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_9) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:35,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:35,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:35,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-03-31 21:04:35,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843532674] [2023-03-31 21:04:35,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:35,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 21:04:35,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:35,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 21:04:35,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2023-03-31 21:04:35,910 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 21:04:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:36,151 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2023-03-31 21:04:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 21:04:36,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 29 [2023-03-31 21:04:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:36,152 INFO L225 Difference]: With dead ends: 105 [2023-03-31 21:04:36,152 INFO L226 Difference]: Without dead ends: 81 [2023-03-31 21:04:36,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 21:04:36,153 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:36,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 70 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:04:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-03-31 21:04:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2023-03-31 21:04:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 21:04:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2023-03-31 21:04:36,179 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 29 [2023-03-31 21:04:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:36,180 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2023-03-31 21:04:36,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 21:04:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2023-03-31 21:04:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 21:04:36,181 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:36,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:36,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-03-31 21:04:36,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 21:04:36,382 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:36,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash 889150781, now seen corresponding path program 10 times [2023-03-31 21:04:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830139000] [2023-03-31 21:04:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:37,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830139000] [2023-03-31 21:04:37,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830139000] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043492137] [2023-03-31 21:04:37,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 21:04:37,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:37,728 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:04:37,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 21:04:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:37,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2023-03-31 21:04:37,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:37,814 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 10 treesize of output 8 [2023-03-31 21:04:37,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 21:04:37,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 21:04:37,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:37,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-03-31 21:04:37,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:37,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:37,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2023-03-31 21:04:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:37,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 58 [2023-03-31 21:04:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 59 [2023-03-31 21:04:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 59 [2023-03-31 21:04:38,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:38,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 61 [2023-03-31 21:04:38,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,184 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:38,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 61 [2023-03-31 21:04:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 59 [2023-03-31 21:04:38,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 59 [2023-03-31 21:04:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,406 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 49 [2023-03-31 21:04:38,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:38,460 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:38,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-03-31 21:04:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:38,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:40,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043492137] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1322968130] [2023-03-31 21:04:40,811 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 21:04:40,811 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:40,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:40,812 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:40,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:40,846 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:40,912 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 21:04:40,918 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:40,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:40,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:42,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4049#(and (<= ~N~0 2147483647) (exists ((v_main_~a~0.base_BEFORE_CALL_10 Int)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_10) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:42,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:42,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:42,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2023-03-31 21:04:42,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885701713] [2023-03-31 21:04:42,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:42,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-03-31 21:04:42,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-03-31 21:04:42,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=4280, Unknown=0, NotChecked=0, Total=4556 [2023-03-31 21:04:42,011 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 53 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:04:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:45,063 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2023-03-31 21:04:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 21:04:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-03-31 21:04:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:45,064 INFO L225 Difference]: With dead ends: 106 [2023-03-31 21:04:45,064 INFO L226 Difference]: Without dead ends: 91 [2023-03-31 21:04:45,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=411, Invalid=5595, Unknown=0, NotChecked=0, Total=6006 [2023-03-31 21:04:45,066 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:45,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 363 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 21:04:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-03-31 21:04:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2023-03-31 21:04:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 70 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 21:04:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2023-03-31 21:04:45,093 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 30 [2023-03-31 21:04:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:45,093 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2023-03-31 21:04:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:04:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2023-03-31 21:04:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 21:04:45,094 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:45,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:45,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 21:04:45,299 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:45,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2089832563, now seen corresponding path program 1 times [2023-03-31 21:04:45,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:45,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156792256] [2023-03-31 21:04:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:04:45,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156792256] [2023-03-31 21:04:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156792256] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:45,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396278910] [2023-03-31 21:04:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:45,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:45,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:45,962 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:04:45,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 21:04:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:46,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 56 conjunts are in the unsatisfiable core [2023-03-31 21:04:46,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:46,032 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 10 treesize of output 8 [2023-03-31 21:04:46,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 21:04:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:46,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-03-31 21:04:46,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-03-31 21:04:46,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:46,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2023-03-31 21:04:46,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:46,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-03-31 21:04:46,191 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:46,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2023-03-31 21:04:46,562 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:46,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2023-03-31 21:04:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:04:46,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:49,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:04:49,555 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2023-03-31 21:04:52,182 WARN L839 $PredicateComparison]: unable to prove that (forall ((|main_~#sum~0.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_main_~#sum~0.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse0 c_main_~a~0.base))) (let ((.cse2 (+ (select .cse1 c_main_~a~0.offset) (select v_arrayElimArr_1 |main_~#sum~0.offset|)))) (= (+ (select (select (store .cse0 c_main_~a~0.base (store .cse1 c_main_~a~0.offset .cse2)) |c_main_~#sum~0.base|) |main_~#sum~0.offset|) (select .cse1 (+ c_main_~a~0.offset 8))) .cse2))))) is different from false [2023-03-31 21:04:55,187 WARN L839 $PredicateComparison]: unable to prove that (forall ((|main_~#sum~0.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse1 (store (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* c_main_~i~0 8)) 1)) |c_main_~#sum~0.base| v_arrayElimArr_1))) (let ((.cse2 (select .cse1 c_main_~a~0.base))) (let ((.cse0 (+ (select .cse2 c_main_~a~0.offset) (select v_arrayElimArr_1 |main_~#sum~0.offset|)))) (= .cse0 (+ (select (select (store .cse1 c_main_~a~0.base (store .cse2 c_main_~a~0.offset .cse0)) |c_main_~#sum~0.base|) |main_~#sum~0.offset|) (select .cse2 (+ c_main_~a~0.offset 8)))))))) is different from false [2023-03-31 21:04:55,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:04:55,442 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 154 treesize of output 80 [2023-03-31 21:04:55,453 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 137 treesize of output 121 [2023-03-31 21:04:55,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:04:55,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-03-31 21:04:55,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:04:55,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2023-03-31 21:04:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-03-31 21:04:56,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396278910] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:56,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107898046] [2023-03-31 21:04:56,008 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 21:04:56,008 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:56,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:56,009 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:56,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:56,054 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:56,289 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-03-31 21:04:56,316 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:56,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:56,331 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:05:04,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4639#(and (<= 0 ~N~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 21:05:04,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:05:04,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:05:04,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 19] total 45 [2023-03-31 21:05:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074951493] [2023-03-31 21:05:04,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:05:04,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-03-31 21:05:04,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:05:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-03-31 21:05:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3206, Unknown=3, NotChecked=230, Total=3660 [2023-03-31 21:05:04,474 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-31 21:05:07,454 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_int| c_main_~a~0.base))) (let ((.cse9 (select .cse8 0))) (let ((.cse1 (<= c_~N~0 2)) (.cse3 (< 1 c_~N~0)) (.cse4 (select .cse8 8)) (.cse0 (not (= .cse9 (+ c_~N~0 1))))) (and (<= c_main_~i~0 1) (<= 1 c_main_~i~0) (or (and (not (= c_main_~i~0 0)) .cse0) (let ((.cse2 (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|))) (and .cse1 (< 1 .cse2) .cse3 (= .cse4 1) (<= .cse2 2) (= c_main_~i~0 1)))) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= c_main_~a~0.offset 0) (or (and .cse1 .cse3 (= 3 .cse4)) .cse0) (forall ((|main_~#sum~0.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse6 (store (store |c_#memory_int| c_main_~a~0.base (store .cse8 (+ c_main_~a~0.offset (* c_main_~i~0 8)) 1)) |c_main_~#sum~0.base| v_arrayElimArr_1))) (let ((.cse7 (select .cse6 c_main_~a~0.base))) (let ((.cse5 (+ (select .cse7 c_main_~a~0.offset) (select v_arrayElimArr_1 |main_~#sum~0.offset|)))) (= .cse5 (+ (select (select (store .cse6 c_main_~a~0.base (store .cse7 c_main_~a~0.offset .cse5)) |c_main_~#sum~0.base|) |main_~#sum~0.offset|) (select .cse7 (+ c_main_~a~0.offset 8)))))))) (= .cse9 1))))) is different from false [2023-03-31 21:05:10,577 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int| c_main_~a~0.base))) (and (forall ((|main_~#sum~0.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_main_~#sum~0.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse0 c_main_~a~0.base))) (let ((.cse2 (+ (select .cse1 c_main_~a~0.offset) (select v_arrayElimArr_1 |main_~#sum~0.offset|)))) (= (+ (select (select (store .cse0 c_main_~a~0.base (store .cse1 c_main_~a~0.offset .cse2)) |c_main_~#sum~0.base|) |main_~#sum~0.offset|) (select .cse1 (+ c_main_~a~0.offset 8))) .cse2))))) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= c_main_~a~0.offset 0) (= (select .cse3 8) 1) (<= 2 c_~N~0) (<= c_main_~i~0 2) (= (select .cse3 0) 1))) is different from false [2023-03-31 21:05:13,784 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int| c_main_~a~0.base))) (and (<= c_~N~0 2) (forall ((|main_~#sum~0.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_main_~#sum~0.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse0 c_main_~a~0.base))) (let ((.cse2 (+ (select .cse1 c_main_~a~0.offset) (select v_arrayElimArr_1 |main_~#sum~0.offset|)))) (= (+ (select (select (store .cse0 c_main_~a~0.base (store .cse1 c_main_~a~0.offset .cse2)) |c_main_~#sum~0.base|) |main_~#sum~0.offset|) (select .cse1 (+ c_main_~a~0.offset 8))) .cse2))))) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= c_main_~a~0.offset 0) (= (select .cse3 8) 1) (<= 2 c_~N~0) (= (select .cse3 0) 1))) is different from false