/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:57:54,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:57:54,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:57:54,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:57:54,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:57:54,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:57:54,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:57:54,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:57:54,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:57:54,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:57:54,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:57:54,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:57:54,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:57:54,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:57:54,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:57:54,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:57:54,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:57:54,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:57:54,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:57:54,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:57:54,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:57:54,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:57:54,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:57:54,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:57:54,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:57:54,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:57:54,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:57:54,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:57:54,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:57:54,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:57:54,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:57:54,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:57:54,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:57:54,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:57:54,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:57:54,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:57:54,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:57:54,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:57:54,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:57:54,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:57:54,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:57:54,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:57:54,428 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:57:54,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:57:54,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:57:54,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:57:54,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:57:54,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:57:54,430 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:57:54,430 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:57:54,430 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:57:54,430 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:57:54,431 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:57:54,431 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:57:54,431 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:57:54,431 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:57:54,431 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:57:54,431 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:57:54,431 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:57:54,431 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:57:54,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:57:54,432 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:57:54,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:57:54,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:57:54,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:57:54,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:57:54,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:57:54,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:57:54,432 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:57:54,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:57:54,433 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:57:54,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:57:54,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:57:54,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:57:54,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:57:54,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:57:54,433 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:57:54,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:57:54,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:57:54,434 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:57:54,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:57:54,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:57:54,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:57:54,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:57:54,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:57:54,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:57:54,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:57:54,651 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:57:54,651 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:57:54,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-2.c [2023-04-01 04:57:55,787 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:57:55,989 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:57:55,990 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-2.c [2023-04-01 04:57:55,996 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2142c25cd/25e307d2938c4fb6b92ce4a1b1c5dffb/FLAGecf7a66b8 [2023-04-01 04:57:56,021 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2142c25cd/25e307d2938c4fb6b92ce4a1b1c5dffb [2023-04-01 04:57:56,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:57:56,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:57:56,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:57:56,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:57:56,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:57:56,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b58cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56, skipping insertion in model container [2023-04-01 04:57:56,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:57:56,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:57:56,166 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-2.c[323,336] [2023-04-01 04:57:56,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:57:56,190 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:57:56,197 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-2.c[323,336] [2023-04-01 04:57:56,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:57:56,221 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:57:56,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56 WrapperNode [2023-04-01 04:57:56,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:57:56,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:57:56,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:57:56,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:57:56,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,247 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:57:56,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:57:56,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:57:56,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:57:56,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (1/1) ... [2023-04-01 04:57:56,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:57:56,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:56,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:57:56,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:57:56,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:57:56,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:57:56,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:57:56,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 04:57:56,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:57:56,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:57:56,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:57:56,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:57:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:57:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:57:56,490 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:57:56,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:57:56,890 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:57:56,953 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:57:56,953 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 04:57:56,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:57:56 BoogieIcfgContainer [2023-04-01 04:57:56,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:57:56,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:57:56,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:57:56,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:57:56,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:57:56" (1/3) ... [2023-04-01 04:57:56,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf9d36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:57:56, skipping insertion in model container [2023-04-01 04:57:56,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:56" (2/3) ... [2023-04-01 04:57:56,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf9d36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:57:56, skipping insertion in model container [2023-04-01 04:57:56,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:57:56" (3/3) ... [2023-04-01 04:57:56,969 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2023-04-01 04:57:56,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:57:56,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:57:57,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:57:57,054 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;@1ef39053, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:57:57,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:57:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:57:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 04:57:57,063 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:57,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:57,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:57,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:57,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1310600714, now seen corresponding path program 1 times [2023-04-01 04:57:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:57,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290199627] [2023-04-01 04:57:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:57,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:57,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290199627] [2023-04-01 04:57:57,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290199627] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:57,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:57,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:57:57,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425470605] [2023-04-01 04:57:57,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:57:57,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:57,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:57:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:57:57,494 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:57,539 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-01 04:57:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:57:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 04:57:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:57,545 INFO L225 Difference]: With dead ends: 41 [2023-04-01 04:57:57,546 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 04:57:57,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:57:57,553 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:57,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:57:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 04:57:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 04:57:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:57:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 04:57:57,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2023-04-01 04:57:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:57,581 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 04:57:57,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 04:57:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 04:57:57,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:57,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:57,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:57:57,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:57,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1980461281, now seen corresponding path program 1 times [2023-04-01 04:57:57,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:57,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558603654] [2023-04-01 04:57:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:57:57,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:57,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558603654] [2023-04-01 04:57:57,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558603654] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:57,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:57,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:57:57,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563607433] [2023-04-01 04:57:57,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:57,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:57:57,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:57:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:57:57,730 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:57,780 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-04-01 04:57:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:57:57,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 04:57:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:57,783 INFO L225 Difference]: With dead ends: 38 [2023-04-01 04:57:57,783 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 04:57:57,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:57:57,792 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:57,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 20 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:57:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 04:57:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2023-04-01 04:57:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:57:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 04:57:57,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2023-04-01 04:57:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:57,811 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 04:57:57,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 04:57:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 04:57:57,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:57,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:57,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:57:57,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:57,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1951663034, now seen corresponding path program 1 times [2023-04-01 04:57:57,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:57,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96987467] [2023-04-01 04:57:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:57:57,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:57,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96987467] [2023-04-01 04:57:57,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96987467] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:57,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:57,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:57:57,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245364663] [2023-04-01 04:57:57,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:57,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:57:57,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:57:57,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:57:57,909 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:57,947 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-04-01 04:57:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:57:57,947 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 04:57:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:57,948 INFO L225 Difference]: With dead ends: 35 [2023-04-01 04:57:57,948 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 04:57:57,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:57:57,954 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:57,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:57:57,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 04:57:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 04:57:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:57:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 04:57:57,963 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2023-04-01 04:57:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:57,964 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 04:57:57,964 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 04:57:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 04:57:57,965 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:57,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:57,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:57:57,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:57,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:57,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1796077818, now seen corresponding path program 1 times [2023-04-01 04:57:57,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:57,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729617008] [2023-04-01 04:57:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:57,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:57:58,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:58,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729617008] [2023-04-01 04:57:58,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729617008] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:58,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:58,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:57:58,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492254262] [2023-04-01 04:57:58,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:58,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:57:58,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:57:58,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:57:58,053 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:58,096 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2023-04-01 04:57:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:57:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 04:57:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:58,097 INFO L225 Difference]: With dead ends: 38 [2023-04-01 04:57:58,097 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 04:57:58,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:57:58,101 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:58,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:57:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 04:57:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2023-04-01 04:57:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:57:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-04-01 04:57:58,106 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 17 [2023-04-01 04:57:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:58,106 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-04-01 04:57:58,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-04-01 04:57:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 04:57:58,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:58,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:58,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:57:58,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:58,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash -615935763, now seen corresponding path program 1 times [2023-04-01 04:57:58,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:58,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029207807] [2023-04-01 04:57:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:58,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:57:58,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029207807] [2023-04-01 04:57:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029207807] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848375028] [2023-04-01 04:57:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:58,181 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:57:58,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:57:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:58,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:57:58,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:57:58,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:57:58,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848375028] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:58,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095674309] [2023-04-01 04:57:58,338 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:57:58,338 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:58,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:58,344 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:58,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:58,434 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:57:59,749 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:57:59,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:57:59,762 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:00,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '533#(and (<= 1 |#StackHeapBarrier|) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_1| Int)) (and (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_1|) 0) 0) (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_1|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:00,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:00,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:00,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-04-01 04:58:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113813621] [2023-04-01 04:58:00,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:00,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 04:58:00,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 04:58:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-04-01 04:58:00,490 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:00,515 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-04-01 04:58:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:58:00,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 04:58:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:00,516 INFO L225 Difference]: With dead ends: 42 [2023-04-01 04:58:00,516 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 04:58:00,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-04-01 04:58:00,517 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:00,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:58:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 04:58:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 04:58:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:58:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-04-01 04:58:00,520 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2023-04-01 04:58:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:00,521 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-04-01 04:58:00,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:00,521 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-04-01 04:58:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:58:00,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:00,521 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:00,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:58:00,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:00,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:00,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1817469494, now seen corresponding path program 2 times [2023-04-01 04:58:00,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:00,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557393604] [2023-04-01 04:58:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:00,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:58:00,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:00,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557393604] [2023-04-01 04:58:00,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557393604] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:00,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234714331] [2023-04-01 04:58:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:58:00,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:00,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:00,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:58:00,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 04:58:00,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:58:00,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:58:00,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 04:58:00,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 04:58:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234714331] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737585396] [2023-04-01 04:58:01,045 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:58:01,046 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:01,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:01,046 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:01,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:01,068 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:58:02,086 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:58:02,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:58:02,098 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:02,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '800#(and (<= 1 |#StackHeapBarrier|) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_2| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_2|) (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_2|) 0) 0) (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_2|))))' at error location [2023-04-01 04:58:02,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:02,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:02,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 04:58:02,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731018724] [2023-04-01 04:58:02,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:02,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:58:02,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:58:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-04-01 04:58:02,754 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:02,833 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2023-04-01 04:58:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:58:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 04:58:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:02,834 INFO L225 Difference]: With dead ends: 69 [2023-04-01 04:58:02,834 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 04:58:02,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2023-04-01 04:58:02,835 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:02,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 29 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:58:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 04:58:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2023-04-01 04:58:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:58:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-04-01 04:58:02,840 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 22 [2023-04-01 04:58:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:02,840 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-04-01 04:58:02,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-04-01 04:58:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 04:58:02,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:02,841 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:02,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:03,048 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,SelfDestructingSolverStorable5 [2023-04-01 04:58:03,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:03,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash 640064466, now seen corresponding path program 3 times [2023-04-01 04:58:03,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:03,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938349489] [2023-04-01 04:58:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:03,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 04:58:03,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:03,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938349489] [2023-04-01 04:58:03,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938349489] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:03,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098648313] [2023-04-01 04:58:03,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:58:03,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:03,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:03,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:58:03,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:58:03,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:58:03,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:58:03,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 04:58:03,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 04:58:03,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098648313] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:03,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732050080] [2023-04-01 04:58:03,605 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:58:03,605 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:03,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:03,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:03,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:03,626 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:58:04,478 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:58:04,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:58:04,491 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:05,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1206#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_3| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_3|) (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_3|) 0) 0) (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_3|))) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:05,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:05,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:05,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 21 [2023-04-01 04:58:05,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392862510] [2023-04-01 04:58:05,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:05,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 04:58:05,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 04:58:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 04:58:05,185 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:05,580 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2023-04-01 04:58:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 04:58:05,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-01 04:58:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:05,583 INFO L225 Difference]: With dead ends: 93 [2023-04-01 04:58:05,583 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 04:58:05,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=454, Invalid=2198, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 04:58:05,595 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 200 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:05,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 136 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:58:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 04:58:05,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2023-04-01 04:58:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:58:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-04-01 04:58:05,613 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 32 [2023-04-01 04:58:05,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:05,613 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-04-01 04:58:05,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-04-01 04:58:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 04:58:05,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:05,614 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:05,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 04:58:05,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:05,833 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:05,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash 561181281, now seen corresponding path program 4 times [2023-04-01 04:58:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:05,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594967817] [2023-04-01 04:58:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:05,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 04:58:06,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594967817] [2023-04-01 04:58:06,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594967817] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437705849] [2023-04-01 04:58:06,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:58:06,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:06,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:06,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:06,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:58:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:06,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 04:58:06,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 04:58:06,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 04:58:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437705849] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1608198733] [2023-04-01 04:58:06,276 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:58:06,276 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:06,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:06,276 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:06,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:06,298 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:58:07,130 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:58:07,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:58:07,139 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:07,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1808#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_4|) 0) 0) (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_4|))) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:07,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:07,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:07,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-04-01 04:58:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663932775] [2023-04-01 04:58:07,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 04:58:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 04:58:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-04-01 04:58:07,766 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:07,846 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2023-04-01 04:58:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:58:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-01 04:58:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:07,848 INFO L225 Difference]: With dead ends: 109 [2023-04-01 04:58:07,848 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 04:58:07,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2023-04-01 04:58:07,849 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:07,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:58:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 04:58:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-04-01 04:58:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:58:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2023-04-01 04:58:07,870 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 48 [2023-04-01 04:58:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:07,871 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2023-04-01 04:58:07,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2023-04-01 04:58:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 04:58:07,879 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:07,879 INFO L195 NwaCegarLoop]: trace histogram [30, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:07,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:08,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:08,085 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:08,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:08,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1662836833, now seen corresponding path program 5 times [2023-04-01 04:58:08,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:08,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562950469] [2023-04-01 04:58:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:08,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 201 proven. 21 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2023-04-01 04:58:08,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:08,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562950469] [2023-04-01 04:58:08,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562950469] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:08,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855110456] [2023-04-01 04:58:08,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:58:08,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:08,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:08,336 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) [2023-04-01 04:58:08,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 04:58:08,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 04:58:08,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:58:08,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 04:58:08,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2023-04-01 04:58:09,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2023-04-01 04:58:09,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855110456] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:09,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267568650] [2023-04-01 04:58:09,135 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:58:09,135 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:09,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:09,136 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:09,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:09,151 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:58:09,987 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:58:09,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:58:09,996 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:10,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2581#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_5| Int)) (and (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_5|) (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_5|) 0) 0))) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:10,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:10,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:10,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-04-01 04:58:10,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839044927] [2023-04-01 04:58:10,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:10,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 04:58:10,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 04:58:10,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 04:58:10,724 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:12,567 INFO L93 Difference]: Finished difference Result 258 states and 326 transitions. [2023-04-01 04:58:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-04-01 04:58:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-01 04:58:12,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:12,570 INFO L225 Difference]: With dead ends: 258 [2023-04-01 04:58:12,571 INFO L226 Difference]: Without dead ends: 205 [2023-04-01 04:58:12,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5760 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4452, Invalid=12578, Unknown=0, NotChecked=0, Total=17030 [2023-04-01 04:58:12,588 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 384 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:12,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 74 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:58:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-04-01 04:58:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2023-04-01 04:58:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:58:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-04-01 04:58:12,624 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 68 [2023-04-01 04:58:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:12,625 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-04-01 04:58:12,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-04-01 04:58:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 04:58:12,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:12,627 INFO L195 NwaCegarLoop]: trace histogram [35, 12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:12,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 04:58:12,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:12,837 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:12,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash -871552802, now seen corresponding path program 6 times [2023-04-01 04:58:12,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434872359] [2023-04-01 04:58:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 261 proven. 28 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2023-04-01 04:58:13,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434872359] [2023-04-01 04:58:13,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434872359] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583805775] [2023-04-01 04:58:13,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:58:13,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:13,207 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) [2023-04-01 04:58:13,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 04:58:13,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:58:13,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:58:13,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 04:58:13,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 129 proven. 284 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2023-04-01 04:58:13,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 129 proven. 284 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2023-04-01 04:58:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583805775] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:13,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419434411] [2023-04-01 04:58:13,844 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:58:13,844 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:13,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:13,845 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:13,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:13,857 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:58:14,718 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:58:14,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:58:14,728 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:15,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3977#(and (<= 1 |#StackHeapBarrier|) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_6| Int)) (and (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_6|) 0) 0) (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_6|) (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_6|))) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:15,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:15,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:15,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 19] total 36 [2023-04-01 04:58:15,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243280978] [2023-04-01 04:58:15,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:15,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 04:58:15,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 04:58:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 04:58:15,582 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:15,763 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2023-04-01 04:58:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 04:58:15,763 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-01 04:58:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:15,763 INFO L225 Difference]: With dead ends: 167 [2023-04-01 04:58:15,764 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 04:58:15,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 216 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=386, Invalid=2584, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 04:58:15,767 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:15,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 123 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:58:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 04:58:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-04-01 04:58:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:58:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2023-04-01 04:58:15,784 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 87 [2023-04-01 04:58:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:15,786 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2023-04-01 04:58:15,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2023-04-01 04:58:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 04:58:15,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:15,788 INFO L195 NwaCegarLoop]: trace histogram [40, 12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:15,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:15,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:15,995 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:15,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1842901242, now seen corresponding path program 7 times [2023-04-01 04:58:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:15,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759737022] [2023-04-01 04:58:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2023-04-01 04:58:16,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:16,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759737022] [2023-04-01 04:58:16,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759737022] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:16,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196448914] [2023-04-01 04:58:16,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:58:16,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:16,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:16,365 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) [2023-04-01 04:58:16,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 04:58:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:16,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 04:58:16,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2023-04-01 04:58:16,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2023-04-01 04:58:16,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196448914] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:16,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981804090] [2023-04-01 04:58:16,830 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:58:16,830 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:16,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:16,831 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:16,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:16,845 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:58:17,649 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:58:17,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:58:17,659 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:18,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5053#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_7| Int)) (and (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_7|) 0) 0) (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_7|) (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)))) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:18,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:18,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:18,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2023-04-01 04:58:18,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951949284] [2023-04-01 04:58:18,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:18,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 04:58:18,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:18,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 04:58:18,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 04:58:18,270 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:18,451 INFO L93 Difference]: Finished difference Result 221 states and 285 transitions. [2023-04-01 04:58:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 04:58:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2023-04-01 04:58:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:18,453 INFO L225 Difference]: With dead ends: 221 [2023-04-01 04:58:18,453 INFO L226 Difference]: Without dead ends: 146 [2023-04-01 04:58:18,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 04:58:18,454 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:18,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 42 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:58:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-01 04:58:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-04-01 04:58:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.0642857142857143) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:58:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2023-04-01 04:58:18,473 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 92 [2023-04-01 04:58:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:18,473 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2023-04-01 04:58:18,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2023-04-01 04:58:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-01 04:58:18,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:18,474 INFO L195 NwaCegarLoop]: trace histogram [90, 12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:18,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:18,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:18,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:18,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash -663657978, now seen corresponding path program 8 times [2023-04-01 04:58:18,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:18,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445679968] [2023-04-01 04:58:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:18,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 1449 proven. 171 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2023-04-01 04:58:19,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:19,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445679968] [2023-04-01 04:58:19,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445679968] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:19,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255214780] [2023-04-01 04:58:19,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:58:19,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:19,673 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) [2023-04-01 04:58:19,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 04:58:40,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-04-01 04:58:40,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:58:40,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 04:58:40,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4495 trivial. 0 not checked. [2023-04-01 04:58:40,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4495 trivial. 0 not checked. [2023-04-01 04:58:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255214780] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603953542] [2023-04-01 04:58:40,825 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:58:40,825 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:40,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:40,825 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:40,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:40,838 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:58:41,643 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:58:41,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:58:41,651 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:42,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6660#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_8| Int)) (and (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_8|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_8|) (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_8|) 0) 0) (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)))) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:42,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:42,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:42,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 50 [2023-04-01 04:58:42,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983693335] [2023-04-01 04:58:42,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:42,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 04:58:42,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 04:58:42,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=2986, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 04:58:42,327 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:58,507 INFO L93 Difference]: Finished difference Result 692 states and 801 transitions. [2023-04-01 04:58:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 422 states. [2023-04-01 04:58:58,508 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2023-04-01 04:58:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:58,509 INFO L225 Difference]: With dead ends: 692 [2023-04-01 04:58:58,509 INFO L226 Difference]: Without dead ends: 577 [2023-04-01 04:58:58,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86340 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=55813, Invalid=157169, Unknown=0, NotChecked=0, Total=212982 [2023-04-01 04:58:58,570 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1241 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:58,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 92 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 04:58:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-04-01 04:58:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 167. [2023-04-01 04:58:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.0559006211180124) internal successors, (170), 161 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:58:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 175 transitions. [2023-04-01 04:58:58,598 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 175 transitions. Word has length 142 [2023-04-01 04:58:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:58,598 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 175 transitions. [2023-04-01 04:58:58,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 175 transitions. [2023-04-01 04:58:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 04:58:58,599 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:58,599 INFO L195 NwaCegarLoop]: trace histogram [95, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:58,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:58,812 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,SelfDestructingSolverStorable11 [2023-04-01 04:58:58,812 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:58,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash 334947190, now seen corresponding path program 9 times [2023-04-01 04:58:58,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:58,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316692604] [2023-04-01 04:58:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:58,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5380 backedges. 1605 proven. 190 refuted. 0 times theorem prover too weak. 3585 trivial. 0 not checked. [2023-04-01 04:58:59,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316692604] [2023-04-01 04:58:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316692604] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388463258] [2023-04-01 04:58:59,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:58:59,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:59,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:59,780 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) [2023-04-01 04:58:59,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 04:59:00,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:59:00,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:59:00,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 04:59:00,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5380 backedges. 405 proven. 1790 refuted. 0 times theorem prover too weak. 3185 trivial. 0 not checked. [2023-04-01 04:59:00,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5380 backedges. 405 proven. 1790 refuted. 0 times theorem prover too weak. 3185 trivial. 0 not checked. [2023-04-01 04:59:01,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388463258] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:01,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852449839] [2023-04-01 04:59:01,476 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:59:01,476 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:01,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:01,476 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:01,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:01,496 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 04:59:02,328 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-04-01 04:59:02,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 04:59:02,351 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:03,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10157#(and (<= 1 |#StackHeapBarrier|) (= ~INFINITY~0 899) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#distance~0.base_BEFORE_CALL_9| Int)) (and (< (select (select |#memory_int| |v_main_~#distance~0.base_BEFORE_CALL_9|) 0) 0) (<= 2 |v_main_~#distance~0.base_BEFORE_CALL_9|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#distance~0.base_BEFORE_CALL_9|) (<= 3 (+ |v_main_~#distance~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:03,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:03,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:03,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43, 43] total 84 [2023-04-01 04:59:03,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696006019] [2023-04-01 04:59:03,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:03,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-04-01 04:59:03,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-04-01 04:59:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1432, Invalid=7688, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 04:59:03,454 INFO L87 Difference]: Start difference. First operand 167 states and 175 transitions. Second operand has 84 states, 84 states have (on average 1.7023809523809523) internal successors, (143), 84 states have internal predecessors, (143), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:03,575 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2023-04-01 04:59:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 04:59:03,576 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.7023809523809523) internal successors, (143), 84 states have internal predecessors, (143), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2023-04-01 04:59:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:03,576 INFO L225 Difference]: With dead ends: 307 [2023-04-01 04:59:03,576 INFO L226 Difference]: Without dead ends: 172 [2023-04-01 04:59:03,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 397 SyntacticMatches, 21 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5716 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1432, Invalid=7688, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 04:59:03,578 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:03,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 219 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:59:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-04-01 04:59:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2023-04-01 04:59:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0542168674698795) internal successors, (175), 166 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:59:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 180 transitions. [2023-04-01 04:59:03,599 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 180 transitions. Word has length 163 [2023-04-01 04:59:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:03,600 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 180 transitions. [2023-04-01 04:59:03,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.7023809523809523) internal successors, (143), 84 states have internal predecessors, (143), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 180 transitions. [2023-04-01 04:59:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-01 04:59:03,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:03,601 INFO L195 NwaCegarLoop]: trace histogram [100, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:03,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 04:59:03,809 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,SelfDestructingSolverStorable12 [2023-04-01 04:59:03,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:03,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash -577295458, now seen corresponding path program 10 times [2023-04-01 04:59:03,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:03,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715858554] [2023-04-01 04:59:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:03,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms