/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:09:42,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:09:42,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:09:42,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:09:42,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:09:42,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:09:42,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:09:42,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:09:42,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:09:42,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:09:42,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:09:42,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:09:42,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:09:42,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:09:42,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:09:42,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:09:42,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:09:42,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:09:42,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:09:42,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:09:42,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:09:42,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:09:42,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:09:42,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:09:42,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:09:42,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:09:42,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:09:42,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:09:42,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:09:42,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:09:42,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:09:42,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:09:42,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:09:42,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:09:42,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:09:42,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:09:42,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:09:42,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:09:42,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:09:42,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:09:42,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:09:42,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:09:42,352 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:09:42,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:09:42,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:09:42,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:09:42,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:09:42,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:09:42,354 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:09:42,354 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:09:42,354 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:09:42,354 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:09:42,354 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:09:42,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:09:42,355 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:09:42,355 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:09:42,355 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:09:42,355 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:09:42,355 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:09:42,356 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:09:42,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:09:42,356 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:09:42,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:09:42,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:09:42,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:09:42,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:09:42,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:09:42,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:09:42,357 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:09:42,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:09:42,358 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:09:42,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:09:42,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:09:42,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:09:42,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:09:42,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:09:42,359 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:09:42,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:09:42,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:09:42,359 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:09:42,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:09:42,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:09:42,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:09:42,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:09:42,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:09:42,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:09:42,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:09:42,566 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:09:42,567 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:09:42,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label23.c [2023-03-31 21:09:43,817 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:09:44,071 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:09:44,071 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label23.c [2023-03-31 21:09:44,098 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa36c7d0f/f1b9e45f4b1c4341bcd4a78097efa2cd/FLAG410abda09 [2023-03-31 21:09:44,110 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa36c7d0f/f1b9e45f4b1c4341bcd4a78097efa2cd [2023-03-31 21:09:44,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:09:44,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:09:44,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:09:44,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:09:44,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:09:44,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1e83ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44, skipping insertion in model container [2023-03-31 21:09:44,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:09:44,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:09:44,447 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/eca-rers2012/Problem01_label23.c[17363,17376] [2023-03-31 21:09:44,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:09:44,523 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:09:44,610 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/eca-rers2012/Problem01_label23.c[17363,17376] [2023-03-31 21:09:44,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:09:44,637 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:09:44,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44 WrapperNode [2023-03-31 21:09:44,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:09:44,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:09:44,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:09:44,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:09:44,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,710 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:09:44,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:09:44,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:09:44,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:09:44,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (1/1) ... [2023-03-31 21:09:44,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:09:44,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:44,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:09:44,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:09:44,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:09:44,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:09:44,828 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:09:44,829 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:09:44,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:09:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:09:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:09:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:09:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:09:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:09:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:09:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:09:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:09:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:09:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:09:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:09:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:09:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:09:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:09:44,912 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:09:44,914 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:09:45,815 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:09:46,022 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:09:46,022 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:09:46,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:09:46 BoogieIcfgContainer [2023-03-31 21:09:46,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:09:46,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:09:46,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:09:46,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:09:46,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:09:44" (1/3) ... [2023-03-31 21:09:46,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1b8fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:09:46, skipping insertion in model container [2023-03-31 21:09:46,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:44" (2/3) ... [2023-03-31 21:09:46,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1b8fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:09:46, skipping insertion in model container [2023-03-31 21:09:46,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:09:46" (3/3) ... [2023-03-31 21:09:46,035 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label23.c [2023-03-31 21:09:46,050 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:09:46,050 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:09:46,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:09:46,107 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;@4127ee09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:09:46,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:09:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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) [2023-03-31 21:09:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 21:09:46,120 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:46,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:46,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:46,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:46,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2062138910, now seen corresponding path program 1 times [2023-03-31 21:09:46,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:46,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489950993] [2023-03-31 21:09:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:46,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:46,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489950993] [2023-03-31 21:09:46,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489950993] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:46,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:09:46,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:09:46,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79445373] [2023-03-31 21:09:46,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:46,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:46,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:46,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:09:46,801 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-03-31 21:09:47,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:47,207 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-03-31 21:09:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-03-31 21:09:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:47,219 INFO L225 Difference]: With dead ends: 246 [2023-03-31 21:09:47,219 INFO L226 Difference]: Without dead ends: 157 [2023-03-31 21:09:47,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:09:47,224 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:47,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:09:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-03-31 21:09:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-03-31 21:09:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8120805369127517) internal successors, (270), 149 states have internal predecessors, (270), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:09:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2023-03-31 21:09:47,268 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2023-03-31 21:09:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:47,268 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2023-03-31 21:09:47,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-03-31 21:09:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2023-03-31 21:09:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 21:09:47,272 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:47,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:47,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:09:47,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:47,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1470124604, now seen corresponding path program 1 times [2023-03-31 21:09:47,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:47,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901768991] [2023-03-31 21:09:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:47,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:47,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:47,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901768991] [2023-03-31 21:09:47,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901768991] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:47,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:09:47,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:09:47,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146274632] [2023-03-31 21:09:47,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:47,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:09:47,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:47,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:09:47,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:09:47,537 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:47,956 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2023-03-31 21:09:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:09:47,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 87 [2023-03-31 21:09:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:47,960 INFO L225 Difference]: With dead ends: 402 [2023-03-31 21:09:47,961 INFO L226 Difference]: Without dead ends: 250 [2023-03-31 21:09:47,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:09:47,963 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 261 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:47,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 43 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:09:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-03-31 21:09:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2023-03-31 21:09:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 225 states have (on average 1.7244444444444444) internal successors, (388), 228 states have internal predecessors, (388), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-03-31 21:09:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2023-03-31 21:09:47,994 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2023-03-31 21:09:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:47,994 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2023-03-31 21:09:47,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2023-03-31 21:09:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-03-31 21:09:47,997 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:47,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:47,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:09:47,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:47,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1308830510, now seen corresponding path program 1 times [2023-03-31 21:09:47,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:47,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089627571] [2023-03-31 21:09:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:47,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:48,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:48,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089627571] [2023-03-31 21:09:48,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089627571] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:48,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328933799] [2023-03-31 21:09:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:48,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:48,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:48,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:09:48,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:09:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:48,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:09:48,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:48,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:09:48,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328933799] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:48,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:09:48,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-03-31 21:09:48,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728860953] [2023-03-31 21:09:48,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:48,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:48,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:48,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:48,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:09:48,645 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:09:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:48,914 INFO L93 Difference]: Finished difference Result 700 states and 1242 transitions. [2023-03-31 21:09:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2023-03-31 21:09:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:48,918 INFO L225 Difference]: With dead ends: 700 [2023-03-31 21:09:48,918 INFO L226 Difference]: Without dead ends: 467 [2023-03-31 21:09:48,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:09:48,920 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:48,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:09:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-03-31 21:09:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2023-03-31 21:09:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 446 states have (on average 1.5269058295964126) internal successors, (681), 451 states have internal predecessors, (681), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-03-31 21:09:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 737 transitions. [2023-03-31 21:09:48,959 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 737 transitions. Word has length 88 [2023-03-31 21:09:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:48,960 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 737 transitions. [2023-03-31 21:09:48,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:09:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 737 transitions. [2023-03-31 21:09:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-31 21:09:48,966 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:48,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:48,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:09:49,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:49,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:49,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2050468986, now seen corresponding path program 1 times [2023-03-31 21:09:49,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:49,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464280608] [2023-03-31 21:09:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:49,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:49,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464280608] [2023-03-31 21:09:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464280608] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:49,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:09:49,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:09:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929208684] [2023-03-31 21:09:49,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:49,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:09:49,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:09:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:09:49,518 INFO L87 Difference]: Start difference. First operand 467 states and 737 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:49,958 INFO L93 Difference]: Finished difference Result 1358 states and 2246 transitions. [2023-03-31 21:09:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:09:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2023-03-31 21:09:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:49,966 INFO L225 Difference]: With dead ends: 1358 [2023-03-31 21:09:49,966 INFO L226 Difference]: Without dead ends: 730 [2023-03-31 21:09:49,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:09:49,974 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 241 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:49,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 49 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:09:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-03-31 21:09:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 643. [2023-03-31 21:09:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 605 states have (on average 1.3305785123966942) internal successors, (805), 623 states have internal predecessors, (805), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (88), 9 states have call predecessors, (88), 9 states have call successors, (88) [2023-03-31 21:09:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 903 transitions. [2023-03-31 21:09:50,004 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 903 transitions. Word has length 94 [2023-03-31 21:09:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:50,004 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 903 transitions. [2023-03-31 21:09:50,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 903 transitions. [2023-03-31 21:09:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-31 21:09:50,006 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:50,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:50,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:09:50,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:50,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash 144090470, now seen corresponding path program 1 times [2023-03-31 21:09:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:50,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188697518] [2023-03-31 21:09:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:50,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:50,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:50,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188697518] [2023-03-31 21:09:50,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188697518] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:50,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:09:50,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:09:50,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716766361] [2023-03-31 21:09:50,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:50,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:09:50,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:09:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:09:50,447 INFO L87 Difference]: Start difference. First operand 643 states and 903 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:50,823 INFO L93 Difference]: Finished difference Result 1384 states and 1984 transitions. [2023-03-31 21:09:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:09:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2023-03-31 21:09:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:50,827 INFO L225 Difference]: With dead ends: 1384 [2023-03-31 21:09:50,827 INFO L226 Difference]: Without dead ends: 746 [2023-03-31 21:09:50,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:09:50,829 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 180 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:50,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 46 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:09:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-03-31 21:09:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 736. [2023-03-31 21:09:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 687 states have (on average 1.2954876273653566) internal successors, (890), 714 states have internal predecessors, (890), 11 states have call successors, (11), 11 states have call predecessors, (11), 37 states have return successors, (126), 10 states have call predecessors, (126), 10 states have call successors, (126) [2023-03-31 21:09:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1027 transitions. [2023-03-31 21:09:50,853 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1027 transitions. Word has length 110 [2023-03-31 21:09:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:50,853 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1027 transitions. [2023-03-31 21:09:50,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1027 transitions. [2023-03-31 21:09:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-03-31 21:09:50,856 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:50,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:50,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:09:50,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:50,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 338345362, now seen corresponding path program 1 times [2023-03-31 21:09:50,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:50,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562145381] [2023-03-31 21:09:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:50,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:51,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:51,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562145381] [2023-03-31 21:09:51,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562145381] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:51,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284420071] [2023-03-31 21:09:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:51,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:51,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:51,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:09:51,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:09:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:51,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:09:51,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:09:51,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:09:51,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284420071] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:51,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:09:51,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 21:09:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545180434] [2023-03-31 21:09:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:09:51,412 INFO L87 Difference]: Start difference. First operand 736 states and 1027 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:09:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:51,687 INFO L93 Difference]: Finished difference Result 2028 states and 2890 transitions. [2023-03-31 21:09:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 135 [2023-03-31 21:09:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:51,693 INFO L225 Difference]: With dead ends: 2028 [2023-03-31 21:09:51,693 INFO L226 Difference]: Without dead ends: 1297 [2023-03-31 21:09:51,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:09:51,695 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:51,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:09:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2023-03-31 21:09:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1297. [2023-03-31 21:09:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1216 states have (on average 1.2491776315789473) internal successors, (1519), 1261 states have internal predecessors, (1519), 18 states have call successors, (18), 18 states have call predecessors, (18), 62 states have return successors, (221), 17 states have call predecessors, (221), 17 states have call successors, (221) [2023-03-31 21:09:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1758 transitions. [2023-03-31 21:09:51,732 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1758 transitions. Word has length 135 [2023-03-31 21:09:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:51,732 INFO L495 AbstractCegarLoop]: Abstraction has 1297 states and 1758 transitions. [2023-03-31 21:09:51,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:09:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1758 transitions. [2023-03-31 21:09:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-03-31 21:09:51,736 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:51,737 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:51,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:09:51,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 21:09:51,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:51,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1346437762, now seen corresponding path program 1 times [2023-03-31 21:09:51,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:51,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146520650] [2023-03-31 21:09:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:51,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:09:52,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:52,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146520650] [2023-03-31 21:09:52,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146520650] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:52,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130829221] [2023-03-31 21:09:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:52,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:52,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:52,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:09:52,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:09:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:52,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:09:52,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-03-31 21:09:52,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:09:52,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130829221] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:52,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:09:52,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-31 21:09:52,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053312633] [2023-03-31 21:09:52,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:52,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:52,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:52,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:52,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:09:52,605 INFO L87 Difference]: Start difference. First operand 1297 states and 1758 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:09:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:52,839 INFO L93 Difference]: Finished difference Result 2668 states and 3629 transitions. [2023-03-31 21:09:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:52,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 158 [2023-03-31 21:09:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:52,845 INFO L225 Difference]: With dead ends: 2668 [2023-03-31 21:09:52,845 INFO L226 Difference]: Without dead ends: 1376 [2023-03-31 21:09:52,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:09:52,848 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:52,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:09:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-03-31 21:09:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1376. [2023-03-31 21:09:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1291 states have (on average 1.1975213013168087) internal successors, (1546), 1338 states have internal predecessors, (1546), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 18 states have call predecessors, (195), 18 states have call successors, (195) [2023-03-31 21:09:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1760 transitions. [2023-03-31 21:09:52,882 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1760 transitions. Word has length 158 [2023-03-31 21:09:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:52,882 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 1760 transitions. [2023-03-31 21:09:52,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:09:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1760 transitions. [2023-03-31 21:09:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-03-31 21:09:52,886 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:52,887 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:52,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 21:09:53,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:53,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:53,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1435749270, now seen corresponding path program 1 times [2023-03-31 21:09:53,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:53,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962181838] [2023-03-31 21:09:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:53,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 111 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 21:09:53,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:53,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962181838] [2023-03-31 21:09:53,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962181838] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:53,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120157631] [2023-03-31 21:09:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:53,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:53,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:09:53,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 21:09:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:53,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:09:53,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-03-31 21:09:53,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:09:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-03-31 21:09:54,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120157631] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:09:54,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346316902] [2023-03-31 21:09:54,077 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-03-31 21:09:54,077 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:09:54,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:09:54,085 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:09:54,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:09:54,314 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-03-31 21:09:55,416 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 82 for LOIs