/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:08:08,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:08:08,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:08:08,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:08:08,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:08:08,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:08:08,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:08:08,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:08:08,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:08:08,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:08:08,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:08:08,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:08:08,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:08:08,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:08:08,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:08:08,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:08:08,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:08:08,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:08:08,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:08:08,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:08:08,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:08:08,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:08:08,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:08:08,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:08:08,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:08:08,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:08:08,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:08:08,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:08:08,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:08:08,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:08:08,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:08:08,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:08:08,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:08:08,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:08:08,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:08:08,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:08:08,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:08:08,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:08:08,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:08:08,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:08:08,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:08:08,219 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 21:08:08,249 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:08:08,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:08:08,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:08:08,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:08:08,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:08:08,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:08:08,251 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:08:08,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:08:08,251 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:08:08,252 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:08:08,252 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:08:08,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:08:08,252 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:08:08,253 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:08:08,253 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:08:08,253 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:08:08,253 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:08:08,253 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:08:08,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:08:08,254 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:08:08,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:08:08,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:08:08,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:08:08,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:08:08,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:08:08,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:08:08,255 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:08:08,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:08:08,255 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:08:08,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:08:08,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:08:08,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:08:08,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:08:08,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:08:08,256 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:08:08,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:08:08,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:08:08,256 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:08:08,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:08:08,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:08:08,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:08:08,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:08:08,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:08:08,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:08:08,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:08:08,510 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:08:08,511 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:08:08,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label02.c [2023-03-31 21:08:09,630 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:08:09,955 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:08:09,956 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label02.c [2023-03-31 21:08:09,968 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686062b59/59064b8be68c4266a24f24486de2eac6/FLAG6d4f9391c [2023-03-31 21:08:09,979 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686062b59/59064b8be68c4266a24f24486de2eac6 [2023-03-31 21:08:09,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:08:09,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:08:09,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:08:09,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:08:09,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:08:09,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:08:09" (1/1) ... [2023-03-31 21:08:09,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a159c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:09, skipping insertion in model container [2023-03-31 21:08:09,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:08:09" (1/1) ... [2023-03-31 21:08:09,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:08:10,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:08:10,285 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_label02.c[16747,16760] [2023-03-31 21:08:10,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:08:10,332 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:08:10,434 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_label02.c[16747,16760] [2023-03-31 21:08:10,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:08:10,476 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:08:10,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10 WrapperNode [2023-03-31 21:08:10,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:08:10,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:08:10,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:08:10,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:08:10,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,549 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:08:10,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:08:10,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:08:10,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:08:10,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (1/1) ... [2023-03-31 21:08:10,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:08:10,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:08:10,588 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 21:08:10,615 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 21:08:10,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:08:10,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:08:10,629 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:08:10,630 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:08:10,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:08:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:08:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:08:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:08:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:08:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:08:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:08:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:08:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:08:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:08:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:08:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:08:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:08:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:08:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:08:10,717 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:08:10,719 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:08:11,612 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:08:11,815 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:08:11,815 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:08:11,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:08:11 BoogieIcfgContainer [2023-03-31 21:08:11,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:08:11,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:08:11,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:08:11,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:08:11,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:08:09" (1/3) ... [2023-03-31 21:08:11,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4d8a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:08:11, skipping insertion in model container [2023-03-31 21:08:11,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:08:10" (2/3) ... [2023-03-31 21:08:11,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4d8a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:08:11, skipping insertion in model container [2023-03-31 21:08:11,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:08:11" (3/3) ... [2023-03-31 21:08:11,825 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label02.c [2023-03-31 21:08:11,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:08:11,840 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:08:11,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:08:11,916 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;@de91311, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:08:11,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:08:11,920 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 21:08:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 21:08:11,930 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:08:11,930 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 21:08:11,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:08:11,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:08:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1124006141, now seen corresponding path program 1 times [2023-03-31 21:08:11,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:08:11,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703124689] [2023-03-31 21:08:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:08:11,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:08:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:08:12,524 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 21:08:12,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:08:12,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703124689] [2023-03-31 21:08:12,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703124689] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:08:12,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:08:12,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:08:12,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727360849] [2023-03-31 21:08:12,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:08:12,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:08:12,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:08:12,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:08:12,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:08:12,568 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 21:08:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:08:12,915 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-03-31 21:08:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:08:12,917 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 21:08:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:08:12,930 INFO L225 Difference]: With dead ends: 246 [2023-03-31 21:08:12,930 INFO L226 Difference]: Without dead ends: 157 [2023-03-31 21:08:12,934 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 21:08:12,936 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:08:12,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:08:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-03-31 21:08:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-03-31 21:08:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 149 states have internal predecessors, (264), 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 21:08:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-03-31 21:08:12,998 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-03-31 21:08:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:08:12,999 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-03-31 21:08:12,999 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 21:08:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-03-31 21:08:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:08:13,003 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:08:13,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:08:13,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:08:13,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:08:13,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:08:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1659985521, now seen corresponding path program 1 times [2023-03-31 21:08:13,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:08:13,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678135560] [2023-03-31 21:08:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:08:13,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:08:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:08:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:08:13,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:08:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678135560] [2023-03-31 21:08:13,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678135560] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:08:13,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:08:13,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:08:13,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528952657] [2023-03-31 21:08:13,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:08:13,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:08:13,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:08:13,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:08:13,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:08:13,265 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 21:08:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:08:13,644 INFO L93 Difference]: Finished difference Result 483 states and 860 transitions. [2023-03-31 21:08:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:08:13,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 86 [2023-03-31 21:08:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:08:13,648 INFO L225 Difference]: With dead ends: 483 [2023-03-31 21:08:13,648 INFO L226 Difference]: Without dead ends: 331 [2023-03-31 21:08:13,649 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 21:08:13,654 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 294 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:08:13,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 43 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:08:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-03-31 21:08:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 315. [2023-03-31 21:08:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 299 states have (on average 1.645484949832776) internal successors, (492), 303 states have internal predecessors, (492), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-03-31 21:08:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 519 transitions. [2023-03-31 21:08:13,694 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 519 transitions. Word has length 86 [2023-03-31 21:08:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:08:13,699 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 519 transitions. [2023-03-31 21:08:13,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 21:08:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 519 transitions. [2023-03-31 21:08:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 21:08:13,703 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:08:13,703 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:08:13,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:08:13,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:08:13,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:08:13,704 INFO L85 PathProgramCache]: Analyzing trace with hash 804830637, now seen corresponding path program 1 times [2023-03-31 21:08:13,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:08:13,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526646892] [2023-03-31 21:08:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:08:13,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:08:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:08:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:08:13,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:08:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526646892] [2023-03-31 21:08:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526646892] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:08:13,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878973971] [2023-03-31 21:08:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:08:13,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:08:13,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:08:13,949 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 21:08:13,988 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 21:08:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:08:14,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:08:14,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:08:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 21:08:14,197 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:08:14,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878973971] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:08:14,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:08:14,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:08:14,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64862241] [2023-03-31 21:08:14,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:08:14,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:08:14,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:08:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:08:14,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:08:14,200 INFO L87 Difference]: Start difference. First operand 315 states and 519 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 21:08:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:08:14,613 INFO L93 Difference]: Finished difference Result 969 states and 1680 transitions. [2023-03-31 21:08:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:08:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 100 [2023-03-31 21:08:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:08:14,617 INFO L225 Difference]: With dead ends: 969 [2023-03-31 21:08:14,618 INFO L226 Difference]: Without dead ends: 659 [2023-03-31 21:08:14,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 21:08:14,620 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 267 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:08:14,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 35 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:08:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-03-31 21:08:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 637. [2023-03-31 21:08:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 602 states have (on average 1.601328903654485) internal successors, (964), 617 states have internal predecessors, (964), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (77), 9 states have call predecessors, (77), 9 states have call successors, (77) [2023-03-31 21:08:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1051 transitions. [2023-03-31 21:08:14,645 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1051 transitions. Word has length 100 [2023-03-31 21:08:14,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:08:14,646 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1051 transitions. [2023-03-31 21:08:14,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 21:08:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1051 transitions. [2023-03-31 21:08:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-31 21:08:14,648 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:08:14,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:08:14,658 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 21:08:14,855 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 21:08:14,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:08:14,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:08:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash 885083181, now seen corresponding path program 1 times [2023-03-31 21:08:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:08:14,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060549173] [2023-03-31 21:08:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:08:14,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:08:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:08:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:08:15,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:08:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060549173] [2023-03-31 21:08:15,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060549173] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:08:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584829222] [2023-03-31 21:08:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:08:15,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:08:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:08:15,017 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 21:08:15,044 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 21:08:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:08:15,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:08:15,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:08:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:08:15,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:08:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:08:15,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584829222] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:08:15,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829707796] [2023-03-31 21:08:15,342 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-03-31 21:08:15,342 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:08:15,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:08:15,352 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:08:15,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:08:15,610 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-03-31 21:08:16,557 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs [2023-03-31 21:09:04,442 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 20