/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/eca-rers2012/Problem01_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:10:40,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:10:40,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:10:40,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:10:40,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:10:40,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:10:40,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:10:40,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:10:40,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:10:40,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:10:40,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:10:40,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:10:40,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:10:40,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:10:40,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:10:40,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:10:40,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:10:40,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:10:40,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:10:40,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:10:40,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:10:40,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:10:40,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:10:40,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:10:40,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:10:40,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:10:40,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:10:40,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:10:40,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:10:40,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:10:40,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:10:40,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:10:40,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:10:40,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:10:40,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:10:40,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:10:40,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:10:40,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:10:40,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:10:40,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:10:40,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:10:40,483 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 03:10:40,515 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:10:40,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:10:40,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:10:40,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:10:40,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:10:40,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:10:40,517 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:10:40,517 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:10:40,517 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:10:40,517 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:10:40,518 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:10:40,518 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:10:40,518 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:10:40,519 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:10:40,519 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:10:40,519 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:10:40,519 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:10:40,519 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:10:40,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:10:40,520 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:10:40,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:10:40,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:10:40,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:10:40,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:10:40,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:10:40,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:10:40,521 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:10:40,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:10:40,521 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:10:40,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:10:40,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:10:40,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:10:40,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:10:40,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:10:40,522 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:10:40,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:10:40,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:10:40,522 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:10:40,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:10:40,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:10:40,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:10:40,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:10:40,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:10:40,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:10:40,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:10:40,839 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:10:40,840 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:10:40,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label14.c [2023-04-01 03:10:42,227 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:10:42,469 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:10:42,474 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label14.c [2023-04-01 03:10:42,490 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0594ac61/446c16dae98249b2899d2b2d88ef9164/FLAG249bbc18b [2023-04-01 03:10:42,501 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0594ac61/446c16dae98249b2899d2b2d88ef9164 [2023-04-01 03:10:42,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:10:42,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:10:42,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:10:42,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:10:42,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:10:42,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:42,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c6e9f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42, skipping insertion in model container [2023-04-01 03:10:42,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:42,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:10:42,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:10:42,841 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_label14.c[21834,21847] [2023-04-01 03:10:42,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:10:42,875 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:10:42,968 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_label14.c[21834,21847] [2023-04-01 03:10:42,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:10:42,989 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:10:42,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42 WrapperNode [2023-04-01 03:10:42,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:10:42,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:10:42,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:10:42,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:10:43,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,122 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:10:43,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:10:43,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:10:43,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:10:43,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (1/1) ... [2023-04-01 03:10:43,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:10:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:43,175 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 03:10:43,197 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 03:10:43,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:10:43,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:10:43,217 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:10:43,217 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:10:43,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:10:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:10:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:10:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:10:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:10:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:10:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:10:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:10:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:10:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:10:43,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:10:43,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:10:43,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:10:43,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:10:43,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:10:43,321 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:10:43,324 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:10:44,428 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:10:44,654 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:10:44,654 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:10:44,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:10:44 BoogieIcfgContainer [2023-04-01 03:10:44,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:10:44,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:10:44,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:10:44,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:10:44,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:10:42" (1/3) ... [2023-04-01 03:10:44,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78172758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:10:44, skipping insertion in model container [2023-04-01 03:10:44,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:42" (2/3) ... [2023-04-01 03:10:44,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78172758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:10:44, skipping insertion in model container [2023-04-01 03:10:44,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:10:44" (3/3) ... [2023-04-01 03:10:44,667 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label14.c [2023-04-01 03:10:44,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:10:44,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:10:44,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:10:44,753 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;@609a2c26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:10:44,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:10:44,759 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) [2023-04-01 03:10:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:10:44,771 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:44,772 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] [2023-04-01 03:10:44,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:44,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2062129694, now seen corresponding path program 1 times [2023-04-01 03:10:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118201750] [2023-04-01 03:10:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:45,492 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 03:10:45,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118201750] [2023-04-01 03:10:45,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118201750] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:45,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:10:45,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:10:45,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567352147] [2023-04-01 03:10:45,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:45,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:10:45,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:10:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:10:45,535 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) [2023-04-01 03:10:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:45,939 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:10:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:10:45,942 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 [2023-04-01 03:10:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:45,958 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:10:45,958 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:10:45,962 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 [2023-04-01 03:10:45,967 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:45,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:10:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:10:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:10:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8926174496644295) internal successors, (282), 149 states have internal predecessors, (282), 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) [2023-04-01 03:10:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2023-04-01 03:10:46,042 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2023-04-01 03:10:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:46,043 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2023-04-01 03:10:46,044 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) [2023-04-01 03:10:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2023-04-01 03:10:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 03:10:46,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:46,051 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] [2023-04-01 03:10:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:10:46,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:46,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2050459770, now seen corresponding path program 1 times [2023-04-01 03:10:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:46,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838251626] [2023-04-01 03:10:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:46,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838251626] [2023-04-01 03:10:46,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838251626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:46,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:10:46,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:10:46,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207175412] [2023-04-01 03:10:46,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:46,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:10:46,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:46,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:10:46,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:10:46,583 INFO L87 Difference]: Start difference. First operand 157 states and 291 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) [2023-04-01 03:10:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:47,051 INFO L93 Difference]: Finished difference Result 477 states and 896 transitions. [2023-04-01 03:10:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:10:47,052 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 [2023-04-01 03:10:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:47,055 INFO L225 Difference]: With dead ends: 477 [2023-04-01 03:10:47,055 INFO L226 Difference]: Without dead ends: 325 [2023-04-01 03:10:47,057 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 [2023-04-01 03:10:47,058 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 251 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:47,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 49 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:10:47,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-04-01 03:10:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2023-04-01 03:10:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 300 states have (on average 1.6033333333333333) internal successors, (481), 305 states have internal predecessors, (481), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-01 03:10:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 507 transitions. [2023-04-01 03:10:47,080 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 507 transitions. Word has length 94 [2023-04-01 03:10:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:47,080 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 507 transitions. [2023-04-01 03:10:47,080 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) [2023-04-01 03:10:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 507 transitions. [2023-04-01 03:10:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 03:10:47,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:47,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:10:47,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:10:47,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:47,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:47,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1147205594, now seen corresponding path program 1 times [2023-04-01 03:10:47,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:47,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628203683] [2023-04-01 03:10:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:47,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:10:47,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628203683] [2023-04-01 03:10:47,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628203683] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:10:47,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607978139] [2023-04-01 03:10:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:47,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:10:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:47,385 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 03:10:47,395 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 03:10:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:47,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:10:47,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:10:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:10:47,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:10:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607978139] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:47,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:10:47,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:10:47,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330529646] [2023-04-01 03:10:47,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:47,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:10:47,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:47,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:10:47,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:10:47,766 INFO L87 Difference]: Start difference. First operand 317 states and 507 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:10:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:48,237 INFO L93 Difference]: Finished difference Result 811 states and 1363 transitions. [2023-04-01 03:10:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:10:48,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 107 [2023-04-01 03:10:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:48,242 INFO L225 Difference]: With dead ends: 811 [2023-04-01 03:10:48,242 INFO L226 Difference]: Without dead ends: 499 [2023-04-01 03:10:48,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:10:48,245 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 235 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:48,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 37 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:10:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-04-01 03:10:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 475. [2023-04-01 03:10:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 450 states have (on average 1.548888888888889) internal successors, (697), 459 states have internal predecessors, (697), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) [2023-04-01 03:10:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 749 transitions. [2023-04-01 03:10:48,289 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 749 transitions. Word has length 107 [2023-04-01 03:10:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:48,290 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 749 transitions. [2023-04-01 03:10:48,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:10:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 749 transitions. [2023-04-01 03:10:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 03:10:48,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:48,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:10:48,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:10:48,502 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 [2023-04-01 03:10:48,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:48,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash 370735014, now seen corresponding path program 1 times [2023-04-01 03:10:48,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:48,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477899199] [2023-04-01 03:10:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:48,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:10:49,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477899199] [2023-04-01 03:10:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477899199] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:10:49,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972906887] [2023-04-01 03:10:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:49,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:10:49,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:49,064 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 03:10:49,067 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 03:10:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:49,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:10:49,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:10:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 03:10:49,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:10:49,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972906887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:49,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:10:49,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 03:10:49,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736195650] [2023-04-01 03:10:49,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:10:49,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:10:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:10:49,349 INFO L87 Difference]: Start difference. First operand 475 states and 749 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2023-04-01 03:10:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:49,663 INFO L93 Difference]: Finished difference Result 1336 states and 2181 transitions. [2023-04-01 03:10:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:10:49,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 113 [2023-04-01 03:10:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:49,670 INFO L225 Difference]: With dead ends: 1336 [2023-04-01 03:10:49,671 INFO L226 Difference]: Without dead ends: 866 [2023-04-01 03:10:49,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:10:49,675 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:49,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:10:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-04-01 03:10:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 789. [2023-04-01 03:10:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 749 states have (on average 1.506008010680908) internal successors, (1128), 765 states have internal predecessors, (1128), 12 states have call successors, (12), 12 states have call predecessors, (12), 27 states have return successors, (92), 11 states have call predecessors, (92), 11 states have call successors, (92) [2023-04-01 03:10:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1232 transitions. [2023-04-01 03:10:49,722 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1232 transitions. Word has length 113 [2023-04-01 03:10:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:49,724 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1232 transitions. [2023-04-01 03:10:49,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2023-04-01 03:10:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1232 transitions. [2023-04-01 03:10:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 03:10:49,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:49,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:10:49,738 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 03:10:49,938 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,SelfDestructingSolverStorable3 [2023-04-01 03:10:49,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:49,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2099322092, now seen corresponding path program 1 times [2023-04-01 03:10:49,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:49,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312128132] [2023-04-01 03:10:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:49,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 47 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:10:50,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:50,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312128132] [2023-04-01 03:10:50,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312128132] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:10:50,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064933825] [2023-04-01 03:10:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:50,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:10:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:50,466 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 03:10:50,469 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 03:10:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:50,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:10:50,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:10:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 03:10:50,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:10:50,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064933825] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:50,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:10:50,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 03:10:50,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252770490] [2023-04-01 03:10:50,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:50,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:10:50,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:50,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:10:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:10:50,707 INFO L87 Difference]: Start difference. First operand 789 states and 1232 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-04-01 03:10:51,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:51,001 INFO L93 Difference]: Finished difference Result 1962 states and 3145 transitions. [2023-04-01 03:10:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:10:51,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 130 [2023-04-01 03:10:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:51,008 INFO L225 Difference]: With dead ends: 1962 [2023-04-01 03:10:51,009 INFO L226 Difference]: Without dead ends: 1178 [2023-04-01 03:10:51,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:10:51,012 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:51,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:10:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-04-01 03:10:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1101. [2023-04-01 03:10:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1047 states have (on average 1.4479465138490926) internal successors, (1516), 1069 states have internal predecessors, (1516), 16 states have call successors, (16), 16 states have call predecessors, (16), 37 states have return successors, (159), 15 states have call predecessors, (159), 15 states have call successors, (159) [2023-04-01 03:10:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1691 transitions. [2023-04-01 03:10:51,068 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1691 transitions. Word has length 130 [2023-04-01 03:10:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:51,069 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1691 transitions. [2023-04-01 03:10:51,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-04-01 03:10:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1691 transitions. [2023-04-01 03:10:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 03:10:51,077 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:51,077 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:10:51,089 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 03:10:51,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:10:51,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:51,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2128816606, now seen corresponding path program 1 times [2023-04-01 03:10:51,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:51,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462361585] [2023-04-01 03:10:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 03:10:51,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462361585] [2023-04-01 03:10:51,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462361585] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:10:51,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312146852] [2023-04-01 03:10:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:51,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:10:51,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:51,528 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 03:10:51,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:10:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:51,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:10:51,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:10:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 03:10:51,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:10:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 03:10:51,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312146852] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:10:51,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148663762] [2023-04-01 03:10:51,895 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:10:51,895 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:10:51,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:10:51,903 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:10:51,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:10:52,250 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:11:15,324 WARN L223 SmtUtils]: Spent 19.58s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 03:11:47,404 WARN L223 SmtUtils]: Spent 20.17s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)