/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/loop-acceleration/array_2-2-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:59:50,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:59:50,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:59:50,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:59:50,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:59:50,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:59:50,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:59:50,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:59:50,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:59:50,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:59:50,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:59:50,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:59:50,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:59:50,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:59:50,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:59:50,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:59:50,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:59:50,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:59:50,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:59:50,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:59:50,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:59:50,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:59:50,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:59:50,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:59:50,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:59:50,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:59:50,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:59:50,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:59:50,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:59:50,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:59:50,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:59:50,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:59:50,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:59:50,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:59:50,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:59:50,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:59:50,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:59:50,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:59:50,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:59:50,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:59:50,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:59:50,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:59:50,559 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:59:50,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:59:50,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:59:50,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:59:50,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:59:50,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:59:50,561 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:59:50,561 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:59:50,561 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:59:50,561 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:59:50,562 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:59:50,562 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:59:50,562 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:59:50,562 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:59:50,562 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:59:50,562 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:59:50,562 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:59:50,562 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:59:50,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:59:50,563 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:59:50,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:59:50,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:59:50,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:59:50,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:59:50,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:59:50,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:59:50,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:59:50,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:59:50,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:59:50,565 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:59:50,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:59:50,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:59:50,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:59:50,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:59:50,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:59:50,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:59:50,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:59:50,854 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:59:50,869 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:59:50,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2023-04-01 04:59:52,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:59:52,542 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:59:52,554 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2023-04-01 04:59:52,559 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03bd8d9f8/0f305fc511a5446b9bce4cec48ef5bfa/FLAGd5352130c [2023-04-01 04:59:52,587 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03bd8d9f8/0f305fc511a5446b9bce4cec48ef5bfa [2023-04-01 04:59:52,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:59:52,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:59:52,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:59:52,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:59:52,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:59:52,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fdfb70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52, skipping insertion in model container [2023-04-01 04:59:52,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:59:52,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:59:52,710 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/loop-acceleration/array_2-2-simple.i[809,822] [2023-04-01 04:59:52,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:59:52,730 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:59:52,738 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/loop-acceleration/array_2-2-simple.i[809,822] [2023-04-01 04:59:52,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:59:52,753 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:59:52,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52 WrapperNode [2023-04-01 04:59:52,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:59:52,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:59:52,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:59:52,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:59:52,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,777 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:59:52,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:59:52,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:59:52,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:59:52,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (1/1) ... [2023-04-01 04:59:52,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:59:52,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:52,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:59:52,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:59:52,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:59:52,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:59:52,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:59:52,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 04:59:52,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:59:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:59:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:59:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:59:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:59:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:59:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:59:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:59:52,955 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:59:52,956 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:59:53,141 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:59:53,164 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:59:53,165 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:59:53,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:59:53 BoogieIcfgContainer [2023-04-01 04:59:53,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:59:53,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:59:53,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:59:53,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:59:53,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:59:52" (1/3) ... [2023-04-01 04:59:53,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad6e80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:59:53, skipping insertion in model container [2023-04-01 04:59:53,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:59:52" (2/3) ... [2023-04-01 04:59:53,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad6e80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:59:53, skipping insertion in model container [2023-04-01 04:59:53,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:59:53" (3/3) ... [2023-04-01 04:59:53,174 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2023-04-01 04:59:53,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:59:53,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:59:53,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:59:53,229 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;@60f610e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:59:53,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:59:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:59:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 04:59:53,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:53,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:53,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:53,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash 877905387, now seen corresponding path program 1 times [2023-04-01 04:59:53,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:53,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475671496] [2023-04-01 04:59:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:53,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:53,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:53,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475671496] [2023-04-01 04:59:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475671496] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:59:53,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:59:53,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:59:53,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609745205] [2023-04-01 04:59:53,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:59:53,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:59:53,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:53,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:59:53,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:59:53,537 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:53,620 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-01 04:59:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:59:53,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 04:59:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:53,627 INFO L225 Difference]: With dead ends: 29 [2023-04-01 04:59:53,627 INFO L226 Difference]: Without dead ends: 12 [2023-04-01 04:59:53,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:59:53,633 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:53,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:59:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-01 04:59:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-01 04:59:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-01 04:59:53,702 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-01 04:59:53,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:53,703 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-01 04:59:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-01 04:59:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:59:53,705 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:53,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:59:53,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:53,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:53,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1368935769, now seen corresponding path program 1 times [2023-04-01 04:59:53,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:53,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237620448] [2023-04-01 04:59:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:53,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:53,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:53,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237620448] [2023-04-01 04:59:53,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237620448] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:53,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506566107] [2023-04-01 04:59:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:53,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:53,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:53,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:59:53,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:59:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:54,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 04:59:54,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:54,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:54,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506566107] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1468851299] [2023-04-01 04:59:54,102 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 04:59:54,102 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:54,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:54,107 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:54,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:54,158 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 04:59:54,247 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 04:59:54,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:59:54,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:54,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#A~0.base_BEFORE_CALL_1| Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int)) (and (<= 2 |v_main_~#B~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#A~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) 4096) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 4096))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#B~0.base_BEFORE_CALL_1|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#B~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#A~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#A~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#A~0.base_BEFORE_CALL_1| |v_main_~#B~0.base_BEFORE_CALL_1|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:54,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:54,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:54,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 04:59:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123487551] [2023-04-01 04:59:54,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:54,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:59:54,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:59:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 04:59:54,526 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:54,540 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-04-01 04:59:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:59:54,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:59:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:54,542 INFO L225 Difference]: With dead ends: 20 [2023-04-01 04:59:54,542 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 04:59:54,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 04:59:54,543 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:54,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:59:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 04:59:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-01 04:59:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-01 04:59:54,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-01 04:59:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:54,547 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-01 04:59:54,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-01 04:59:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 04:59:54,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:54,547 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:54,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:59:54,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:54,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:54,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:54,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1527697045, now seen corresponding path program 2 times [2023-04-01 04:59:54,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:54,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600479580] [2023-04-01 04:59:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:54,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:54,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:54,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600479580] [2023-04-01 04:59:54,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600479580] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:54,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731180789] [2023-04-01 04:59:54,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:59:54,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:54,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:54,843 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 04:59:54,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:59:54,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:59:54,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:59:54,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:59:54,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:54,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:54,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731180789] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:54,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972530655] [2023-04-01 04:59:54,996 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 04:59:54,996 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:54,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:54,996 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:54,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:55,021 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 04:59:55,094 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 04:59:55,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:59:55,159 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:55,428 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#B~0.base_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#B~0.base_BEFORE_CALL_2|)) (<= 4 (+ |v_main_~#A~0.base_BEFORE_CALL_2| |v_main_~#B~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#B~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#A~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#B~0.base_BEFORE_CALL_2|) (<= 3 (+ |v_main_~#A~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= 2 |v_main_~#A~0.base_BEFORE_CALL_2|) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) 4096) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 4096))))) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:55,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:55,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:55,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 04:59:55,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995274343] [2023-04-01 04:59:55,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:55,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:59:55,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:55,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:59:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:59:55,430 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 04:59:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:55,474 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-04-01 04:59:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:59:55,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 04:59:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:55,475 INFO L225 Difference]: With dead ends: 26 [2023-04-01 04:59:55,475 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 04:59:55,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:59:55,478 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:55,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:59:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 04:59:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 04:59:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-04-01 04:59:55,488 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-04-01 04:59:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:55,488 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-04-01 04:59:55,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 04:59:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-04-01 04:59:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 04:59:55,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:55,489 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:55,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:59:55,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 04:59:55,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:55,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash 278137515, now seen corresponding path program 3 times [2023-04-01 04:59:55,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:55,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068642669] [2023-04-01 04:59:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:55,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:55,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:55,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068642669] [2023-04-01 04:59:55,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068642669] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:55,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080873000] [2023-04-01 04:59:55,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:59:55,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:55,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:55,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:59:55,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:59:56,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:59:56,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:59:56,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:59:56,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:56,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:56,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080873000] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:56,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1275733883] [2023-04-01 04:59:56,213 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 04:59:56,213 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:56,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:56,214 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:56,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:56,231 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 04:59:56,275 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 04:59:56,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:59:56,292 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:56,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '548#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) 4096) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) 4096))) (<= 2 |v_main_~#B~0.base_BEFORE_CALL_3|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#A~0.base_BEFORE_CALL_3|) (<= 4 (+ |v_main_~#A~0.base_BEFORE_CALL_3| |v_main_~#B~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#A~0.base_BEFORE_CALL_3|) (<= 3 (+ |v_main_~#A~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#B~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#B~0.base_BEFORE_CALL_3|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:56,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:56,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:56,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 04:59:56,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797058007] [2023-04-01 04:59:56,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:56,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 04:59:56,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:56,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 04:59:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 04:59:56,559 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 04:59:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:56,587 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-04-01 04:59:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 04:59:56,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 20 [2023-04-01 04:59:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:56,588 INFO L225 Difference]: With dead ends: 38 [2023-04-01 04:59:56,588 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 04:59:56,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 04:59:56,589 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:56,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:59:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 04:59:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 04:59:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2023-04-01 04:59:56,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2023-04-01 04:59:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:56,593 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2023-04-01 04:59:56,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 04:59:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2023-04-01 04:59:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 04:59:56,594 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:56,594 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:56,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:59:56,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:56,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:56,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash -697963221, now seen corresponding path program 4 times [2023-04-01 04:59:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:56,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94109125] [2023-04-01 04:59:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:57,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:57,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94109125] [2023-04-01 04:59:57,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94109125] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:57,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298245055] [2023-04-01 04:59:57,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:59:57,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:57,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:57,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:59:57,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:59:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:57,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 04:59:57,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:57,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:57,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298245055] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:57,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383029614] [2023-04-01 04:59:57,965 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 04:59:57,965 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:57,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:57,966 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:57,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:57,979 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 04:59:58,014 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 04:59:58,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:59:58,028 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:58,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '926#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#B~0.base_BEFORE_CALL_4| Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#A~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#A~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#A~0.base_BEFORE_CALL_4| |v_main_~#B~0.base_BEFORE_CALL_4|)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) 4096) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 4096))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#B~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#B~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#A~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#B~0.base_BEFORE_CALL_4|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:58,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:58,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:58,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 04:59:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591735903] [2023-04-01 04:59:58,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:58,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 04:59:58,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 04:59:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2101, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 04:59:58,335 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 04:59:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:58,382 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2023-04-01 04:59:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 04:59:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 04:59:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:58,383 INFO L225 Difference]: With dead ends: 62 [2023-04-01 04:59:58,383 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 04:59:58,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1205, Invalid=2101, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 04:59:58,385 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:58,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:59:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 04:59:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-01 04:59:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:59:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2023-04-01 04:59:58,390 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2023-04-01 04:59:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:58,391 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2023-04-01 04:59:58,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 04:59:58,391 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2023-04-01 04:59:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 04:59:58,392 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:58,392 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:58,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:59:58,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:58,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:58,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1226149333, now seen corresponding path program 5 times [2023-04-01 04:59:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:58,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177001789] [2023-04-01 04:59:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:00:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:00:00,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:00:00,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177001789] [2023-04-01 05:00:00,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177001789] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:00:00,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47693606] [2023-04-01 05:00:00,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:00:00,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:00:00,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:00:00,058 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 05:00:00,060 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 05:00:01,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-01 05:00:01,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:00:01,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 05:00:01,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:00:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:00:01,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:00:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:00:04,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47693606] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:00:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446425954] [2023-04-01 05:00:04,227 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:00:04,227 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:00:04,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:00:04,241 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:00:04,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:00:04,254 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 05:00:04,303 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 05:00:04,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:00:04,317 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:00:04,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1592#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#B~0.base_BEFORE_CALL_5| Int) (|v_main_~#A~0.base_BEFORE_CALL_5| Int)) (and (<= 4 (+ |v_main_~#A~0.base_BEFORE_CALL_5| |v_main_~#B~0.base_BEFORE_CALL_5|)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_5|) 4096) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) 4096))) (<= 2 |v_main_~#A~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#B~0.base_BEFORE_CALL_5|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#B~0.base_BEFORE_CALL_5|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#A~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#B~0.base_BEFORE_CALL_5|) (<= 3 (+ |v_main_~#A~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:00:04,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:00:04,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:00:04,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-01 05:00:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418140657] [2023-04-01 05:00:04,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:00:04,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-01 05:00:04,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:00:04,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-01 05:00:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4685, Invalid=6445, Unknown=0, NotChecked=0, Total=11130 [2023-04-01 05:00:04,735 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 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 05:00:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:00:04,826 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2023-04-01 05:00:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-01 05:00:04,826 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 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 56 [2023-04-01 05:00:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:00:04,827 INFO L225 Difference]: With dead ends: 110 [2023-04-01 05:00:04,827 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 05:00:04,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4685, Invalid=6445, Unknown=0, NotChecked=0, Total=11130 [2023-04-01 05:00:04,830 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:00:04,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:00:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 05:00:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-04-01 05:00:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:00:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2023-04-01 05:00:04,837 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2023-04-01 05:00:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:00:04,837 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2023-04-01 05:00:04,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 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 05:00:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2023-04-01 05:00:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 05:00:04,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:00:04,839 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:00:04,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:00:05,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:00:05,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:00:05,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:00:05,049 INFO L85 PathProgramCache]: Analyzing trace with hash 687242283, now seen corresponding path program 6 times [2023-04-01 05:00:05,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:00:05,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578632111] [2023-04-01 05:00:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:00:05,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:00:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:00:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:00:09,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:00:09,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578632111] [2023-04-01 05:00:09,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578632111] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:00:09,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411578451] [2023-04-01 05:00:09,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:00:09,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:00:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:00:09,853 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 05:00:09,854 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 05:00:10,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:00:10,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:00:10,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 05:00:10,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:00:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:00:10,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:00:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:00:17,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411578451] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:00:17,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403680030] [2023-04-01 05:00:17,986 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:00:17,986 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:00:17,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:00:17,987 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:00:17,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:00:18,009 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 05:00:18,071 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 05:00:18,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:00:18,086 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:00:18,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2834#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#B~0.base_BEFORE_CALL_6| Int) (|v_main_~#A~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#B~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#B~0.base_BEFORE_CALL_6|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#B~0.base_BEFORE_CALL_6|)) (<= 4 (+ |v_main_~#A~0.base_BEFORE_CALL_6| |v_main_~#B~0.base_BEFORE_CALL_6|)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_6|) 4096) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_6|) 4096))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#A~0.base_BEFORE_CALL_6|) (<= 3 (+ |v_main_~#A~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= 2 |v_main_~#A~0.base_BEFORE_CALL_6|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:00:18,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:00:18,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:00:18,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-04-01 05:00:18,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849246109] [2023-04-01 05:00:18,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:00:18,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-04-01 05:00:18,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:00:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-04-01 05:00:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18557, Invalid=22045, Unknown=0, NotChecked=0, Total=40602 [2023-04-01 05:00:18,725 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 193 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 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 05:00:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:00:19,007 INFO L93 Difference]: Finished difference Result 206 states and 301 transitions. [2023-04-01 05:00:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-04-01 05:00:19,008 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 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 104 [2023-04-01 05:00:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:00:19,009 INFO L225 Difference]: With dead ends: 206 [2023-04-01 05:00:19,009 INFO L226 Difference]: Without dead ends: 201 [2023-04-01 05:00:19,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=18557, Invalid=22045, Unknown=0, NotChecked=0, Total=40602 [2023-04-01 05:00:19,012 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:00:19,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:00:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-04-01 05:00:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-04-01 05:00:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:00:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2023-04-01 05:00:19,021 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2023-04-01 05:00:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:00:19,022 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2023-04-01 05:00:19,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 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 05:00:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2023-04-01 05:00:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-01 05:00:19,023 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:00:19,023 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:00:19,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 05:00:19,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:00:19,230 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:00:19,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:00:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1025151019, now seen corresponding path program 7 times [2023-04-01 05:00:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:00:19,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031829747] [2023-04-01 05:00:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:00:19,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:00:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:00:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:00:35,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:00:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031829747] [2023-04-01 05:00:35,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031829747] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:00:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472020516] [2023-04-01 05:00:35,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:00:35,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:00:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:00:35,422 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 05:00:35,424 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 05:00:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:00:35,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 192 conjunts are in the unsatisfiable core [2023-04-01 05:00:35,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:00:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:00:36,131 INFO L327 TraceCheckSpWp]: Computing backward predicates...