/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_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:08:54,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:08:54,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:08:54,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:08:54,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:08:54,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:08:54,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:08:54,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:08:54,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:08:54,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:08:54,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:08:54,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:08:54,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:08:54,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:08:54,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:08:54,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:08:54,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:08:54,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:08:54,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:08:54,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:08:54,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:08:54,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:08:54,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:08:54,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:08:54,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:08:54,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:08:54,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:08:54,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:08:54,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:08:54,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:08:54,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:08:54,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:08:54,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:08:54,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:08:54,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:08:54,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:08:54,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:08:54,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:08:54,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:08:54,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:08:54,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:08:54,472 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 21:08:54,508 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:08:54,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:08:54,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:08:54,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:08:54,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:08:54,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:08:54,510 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:08:54,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:08:54,511 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:08:54,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:08:54,511 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:08:54,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:08:54,512 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:08:54,512 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:08:54,512 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:08:54,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:08:54,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:08:54,512 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:08:54,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:08:54,513 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:08:54,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:08:54,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:08:54,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:08:54,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:08:54,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:08:54,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:08:54,514 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:08:54,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:08:54,514 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:08:54,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:08:54,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:08:54,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:08:54,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:08:54,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:08:54,515 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:08:54,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:08:54,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:08:54,515 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:08:54,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:08:54,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:08:54,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:08:54,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:08:54,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:08:54,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:08:54,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:08:54,758 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:08:54,759 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:08:54,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label14.c [2023-03-31 21:08:56,008 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:08:56,272 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:08:56,272 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label14.c [2023-03-31 21:08:56,291 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae31c8dc/3e6ca39ee5ea42bba6cb0a6048756d94/FLAGfa54f35eb [2023-03-31 21:08:56,303 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae31c8dc/3e6ca39ee5ea42bba6cb0a6048756d94 [2023-03-31 21:08:56,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:08:56,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:08:56,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:08:56,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:08:56,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:08:56,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f63b63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56, skipping insertion in model container [2023-03-31 21:08:56,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:08:56,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:08:56,612 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] [2023-03-31 21:08:56,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:08:56,638 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:08:56,708 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] [2023-03-31 21:08:56,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:08:56,725 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:08:56,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56 WrapperNode [2023-03-31 21:08:56,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:08:56,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:08:56,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:08:56,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:08:56,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:08:56,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:08:56,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:08:56,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:08:56,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (1/1) ... [2023-03-31 21:08:56,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:08:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:08:56,854 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 21:08:56,877 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 21:08:56,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:08:56,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:08:56,894 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:08:56,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:08:56,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:08:56,895 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:08:56,895 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:08:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:08:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:08:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:08:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:08:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:08:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:08:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:08:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:08:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:08:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:08:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:08:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:08:56,988 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:08:56,990 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:08:57,876 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:08:58,038 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:08:58,038 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:08:58,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:08:58 BoogieIcfgContainer [2023-03-31 21:08:58,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:08:58,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:08:58,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:08:58,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:08:58,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:08:56" (1/3) ... [2023-03-31 21:08:58,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c774f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:08:58, skipping insertion in model container [2023-03-31 21:08:58,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:56" (2/3) ... [2023-03-31 21:08:58,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c774f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:08:58, skipping insertion in model container [2023-03-31 21:08:58,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:08:58" (3/3) ... [2023-03-31 21:08:58,049 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label14.c [2023-03-31 21:08:58,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:08:58,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:08:58,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:08:58,120 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;@32ca8416, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:08:58,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:08:58,124 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 21:08:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 21:08:58,133 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:08:58,133 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 21:08:58,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:08:58,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:08:58,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2062129694, now seen corresponding path program 1 times [2023-03-31 21:08:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:08:58,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459300908] [2023-03-31 21:08:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:08:58,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:08:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:08:58,855 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 21:08:58,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:08:58,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459300908] [2023-03-31 21:08:58,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459300908] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:08:58,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:08:58,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:08:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649002898] [2023-03-31 21:08:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:08:58,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:08:58,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:08:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:08:58,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:08:58,892 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 21:08:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:08:59,321 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-03-31 21:08:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:08:59,322 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 21:08:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:08:59,336 INFO L225 Difference]: With dead ends: 246 [2023-03-31 21:08:59,336 INFO L226 Difference]: Without dead ends: 157 [2023-03-31 21:08:59,339 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 21:08:59,343 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, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:08:59,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:08:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-03-31 21:08:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-03-31 21:08:59,390 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) [2023-03-31 21:08:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2023-03-31 21:08:59,393 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2023-03-31 21:08:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:08:59,394 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2023-03-31 21:08:59,394 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 21:08:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2023-03-31 21:08:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-31 21:08:59,398 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:08:59,398 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 21:08:59,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:08:59,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:08:59,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:08:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2050459770, now seen corresponding path program 1 times [2023-03-31 21:08:59,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:08:59,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072480609] [2023-03-31 21:08:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:08:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:08:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:08:59,881 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 21:08:59,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:08:59,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072480609] [2023-03-31 21:08:59,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072480609] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:08:59,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:08:59,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:08:59,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558232729] [2023-03-31 21:08:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:08:59,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:08:59,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:08:59,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:08:59,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:08:59,886 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) [2023-03-31 21:09:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:00,316 INFO L93 Difference]: Finished difference Result 477 states and 896 transitions. [2023-03-31 21:09:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:09:00,317 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 21:09:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:00,320 INFO L225 Difference]: With dead ends: 477 [2023-03-31 21:09:00,320 INFO L226 Difference]: Without dead ends: 325 [2023-03-31 21:09:00,321 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 21:09:00,322 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 [2023-03-31 21:09:00,323 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] [2023-03-31 21:09:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-03-31 21:09:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2023-03-31 21:09:00,345 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) [2023-03-31 21:09:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 507 transitions. [2023-03-31 21:09:00,347 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 507 transitions. Word has length 94 [2023-03-31 21:09:00,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:00,347 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 507 transitions. [2023-03-31 21:09:00,348 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 21:09:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 507 transitions. [2023-03-31 21:09:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-31 21:09:00,351 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:00,352 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] [2023-03-31 21:09:00,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:09:00,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:00,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1147205594, now seen corresponding path program 1 times [2023-03-31 21:09:00,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:00,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303372488] [2023-03-31 21:09:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:00,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:09:00,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:00,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303372488] [2023-03-31 21:09:00,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303372488] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:00,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979525977] [2023-03-31 21:09:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:00,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:00,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:00,637 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 21:09:00,661 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 21:09:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:00,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:09:00,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:09:00,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:09:00,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979525977] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:00,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:09:00,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:09:00,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270871388] [2023-03-31 21:09:00,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:00,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:09:00,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:09:00,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:09:00,879 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) [2023-03-31 21:09:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:01,361 INFO L93 Difference]: Finished difference Result 811 states and 1363 transitions. [2023-03-31 21:09:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:09:01,362 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 [2023-03-31 21:09:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:01,365 INFO L225 Difference]: With dead ends: 811 [2023-03-31 21:09:01,365 INFO L226 Difference]: Without dead ends: 499 [2023-03-31 21:09:01,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:09:01,368 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 235 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2023-03-31 21:09:01,369 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] [2023-03-31 21:09:01,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-03-31 21:09:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 475. [2023-03-31 21:09:01,409 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) [2023-03-31 21:09:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 749 transitions. [2023-03-31 21:09:01,411 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 749 transitions. Word has length 107 [2023-03-31 21:09:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:01,412 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 749 transitions. [2023-03-31 21:09:01,412 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) [2023-03-31 21:09:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 749 transitions. [2023-03-31 21:09:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-03-31 21:09:01,414 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:01,414 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] [2023-03-31 21:09:01,427 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 21:09:01,621 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 21:09:01,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:01,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:01,623 INFO L85 PathProgramCache]: Analyzing trace with hash 370735014, now seen corresponding path program 1 times [2023-03-31 21:09:01,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:01,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321577553] [2023-03-31 21:09:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:01,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:09:02,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321577553] [2023-03-31 21:09:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321577553] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774697061] [2023-03-31 21:09:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:02,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:02,058 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 21:09:02,061 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 21:09:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:02,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:09:02,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:09:02,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:09:02,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774697061] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:02,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:09:02,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 21:09:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822123366] [2023-03-31 21:09:02,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:02,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:02,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:02,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:02,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:09:02,341 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) [2023-03-31 21:09:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:02,591 INFO L93 Difference]: Finished difference Result 1336 states and 2181 transitions. [2023-03-31 21:09:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:02,592 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 [2023-03-31 21:09:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:02,597 INFO L225 Difference]: With dead ends: 1336 [2023-03-31 21:09:02,597 INFO L226 Difference]: Without dead ends: 866 [2023-03-31 21:09:02,599 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 [2023-03-31 21:09:02,601 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, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:02,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:09:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-03-31 21:09:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 789. [2023-03-31 21:09:02,640 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) [2023-03-31 21:09:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1232 transitions. [2023-03-31 21:09:02,644 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1232 transitions. Word has length 113 [2023-03-31 21:09:02,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:02,645 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1232 transitions. [2023-03-31 21:09:02,645 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) [2023-03-31 21:09:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1232 transitions. [2023-03-31 21:09:02,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-03-31 21:09:02,651 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:02,651 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] [2023-03-31 21:09:02,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 21:09:02,858 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 [2023-03-31 21:09:02,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:02,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:02,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2099322092, now seen corresponding path program 1 times [2023-03-31 21:09:02,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:02,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321840539] [2023-03-31 21:09:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:02,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 47 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:09:03,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:03,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321840539] [2023-03-31 21:09:03,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321840539] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:03,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132653575] [2023-03-31 21:09:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:03,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:03,324 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 21:09:03,353 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 21:09:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:03,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:09:03,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 21:09:03,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:09:03,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132653575] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:03,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:09:03,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 21:09:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914704946] [2023-03-31 21:09:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:03,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:03,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:09:03,566 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) [2023-03-31 21:09:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:03,806 INFO L93 Difference]: Finished difference Result 1962 states and 3145 transitions. [2023-03-31 21:09:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:03,806 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 [2023-03-31 21:09:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:03,814 INFO L225 Difference]: With dead ends: 1962 [2023-03-31 21:09:03,814 INFO L226 Difference]: Without dead ends: 1178 [2023-03-31 21:09:03,815 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 [2023-03-31 21:09:03,816 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, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:03,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:09:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-03-31 21:09:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1101. [2023-03-31 21:09:03,858 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) [2023-03-31 21:09:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1691 transitions. [2023-03-31 21:09:03,863 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1691 transitions. Word has length 130 [2023-03-31 21:09:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:03,864 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1691 transitions. [2023-03-31 21:09:03,864 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) [2023-03-31 21:09:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1691 transitions. [2023-03-31 21:09:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-03-31 21:09:03,869 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:03,869 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] [2023-03-31 21:09:03,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 21:09:04,075 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 [2023-03-31 21:09:04,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:04,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:04,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2128816606, now seen corresponding path program 1 times [2023-03-31 21:09:04,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:04,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841346769] [2023-03-31 21:09:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:04,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 21:09:04,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:04,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841346769] [2023-03-31 21:09:04,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841346769] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:04,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109987165] [2023-03-31 21:09:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:04,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:04,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:04,249 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 21:09:04,275 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 21:09:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:04,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:09:04,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-03-31 21:09:04,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:09:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 21:09:04,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109987165] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:09:04,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842418964] [2023-03-31 21:09:04,585 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-03-31 21:09:04,585 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:09:04,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:09:04,592 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:09:04,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:09:04,854 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-03-31 21:09:05,997 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs