/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 16:25:40,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 16:25:40,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 16:25:40,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 16:25:40,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 16:25:40,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 16:25:40,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 16:25:40,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 16:25:40,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 16:25:40,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 16:25:40,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 16:25:40,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 16:25:40,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 16:25:40,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 16:25:40,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 16:25:40,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 16:25:40,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 16:25:40,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 16:25:40,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 16:25:40,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 16:25:40,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 16:25:40,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 16:25:40,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 16:25:40,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 16:25:40,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 16:25:40,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 16:25:40,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 16:25:40,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 16:25:40,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 16:25:40,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 16:25:40,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 16:25:40,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 16:25:40,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 16:25:40,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 16:25:40,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 16:25:40,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 16:25:40,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 16:25:40,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 16:25:40,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 16:25:40,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 16:25:40,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 16:25:40,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 16:25:40,321 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 16:25:40,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 16:25:40,321 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 16:25:40,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 16:25:40,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 16:25:40,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 16:25:40,322 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 16:25:40,322 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 16:25:40,322 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 16:25:40,322 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 16:25:40,323 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 16:25:40,323 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 16:25:40,323 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 16:25:40,323 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 16:25:40,323 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 16:25:40,323 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 16:25:40,324 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 16:25:40,324 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 16:25:40,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 16:25:40,324 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 16:25:40,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 16:25:40,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 16:25:40,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 16:25:40,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 16:25:40,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 16:25:40,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 16:25:40,325 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 16:25:40,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 16:25:40,325 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 16:25:40,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 16:25:40,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:25:40,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 16:25:40,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 16:25:40,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 16:25:40,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 16:25:40,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 16:25:40,551 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 16:25:40,552 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 16:25:40,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label48.c [2023-04-02 16:25:41,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 16:25:41,801 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 16:25:41,801 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label48.c [2023-04-02 16:25:41,817 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdbd4903d/ee04cd98ec3541b6ba9f061b7fe0bcd6/FLAGe9836aa6c [2023-04-02 16:25:41,828 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdbd4903d/ee04cd98ec3541b6ba9f061b7fe0bcd6 [2023-04-02 16:25:41,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 16:25:41,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 16:25:41,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 16:25:41,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 16:25:41,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 16:25:41,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:25:41" (1/1) ... [2023-04-02 16:25:41,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cc63c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:41, skipping insertion in model container [2023-04-02 16:25:41,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:25:41" (1/1) ... [2023-04-02 16:25:41,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 16:25:41,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 16:25:42,077 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/Problem02_label48.c[20995,21008] [2023-04-02 16:25:42,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:25:42,107 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 16:25:42,168 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/Problem02_label48.c[20995,21008] [2023-04-02 16:25:42,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:25:42,190 INFO L208 MainTranslator]: Completed translation [2023-04-02 16:25:42,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42 WrapperNode [2023-04-02 16:25:42,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 16:25:42,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 16:25:42,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 16:25:42,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 16:25:42,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,294 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 16:25:42,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 16:25:42,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 16:25:42,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 16:25:42,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (1/1) ... [2023-04-02 16:25:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:25:42,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:25:42,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 16:25:42,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 16:25:42,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 16:25:42,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 16:25:42,377 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 16:25:42,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 16:25:42,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 16:25:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 16:25:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 16:25:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 16:25:42,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 16:25:42,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 16:25:42,445 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 16:25:42,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 16:25:43,293 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 16:25:43,513 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 16:25:43,514 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 16:25:43,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:25:43 BoogieIcfgContainer [2023-04-02 16:25:43,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 16:25:43,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 16:25:43,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 16:25:43,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 16:25:43,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:25:41" (1/3) ... [2023-04-02 16:25:43,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@520ac2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:25:43, skipping insertion in model container [2023-04-02 16:25:43,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:25:42" (2/3) ... [2023-04-02 16:25:43,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@520ac2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:25:43, skipping insertion in model container [2023-04-02 16:25:43,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:25:43" (3/3) ... [2023-04-02 16:25:43,527 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label48.c [2023-04-02 16:25:43,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 16:25:43,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 16:25:43,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 16:25:43,600 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;@6519fd9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 16:25:43,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 16:25:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 16:25:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-02 16:25:43,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:25:43,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:25:43,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:25:43,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:25:43,621 INFO L85 PathProgramCache]: Analyzing trace with hash -818160297, now seen corresponding path program 1 times [2023-04-02 16:25:43,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:25:43,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052628930] [2023-04-02 16:25:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:43,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:25:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:25:44,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:25:44,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052628930] [2023-04-02 16:25:44,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052628930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:25:44,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:25:44,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:25:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926664300] [2023-04-02 16:25:44,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:25:44,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:25:44,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:25:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:25:44,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:25:44,346 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:25:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:25:44,668 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-02 16:25:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:25:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-02 16:25:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:25:44,685 INFO L225 Difference]: With dead ends: 273 [2023-04-02 16:25:44,685 INFO L226 Difference]: Without dead ends: 175 [2023-04-02 16:25:44,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:25:44,692 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 16:25:44,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 48 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 16:25:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-02 16:25:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-02 16:25:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.784431137724551) internal successors, (298), 167 states have internal predecessors, (298), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 16:25:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 307 transitions. [2023-04-02 16:25:44,735 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 307 transitions. Word has length 86 [2023-04-02 16:25:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:25:44,735 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 307 transitions. [2023-04-02 16:25:44,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:25:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 307 transitions. [2023-04-02 16:25:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 16:25:44,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:25:44,739 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:25:44,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 16:25:44,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:25:44,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:25:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1524530731, now seen corresponding path program 1 times [2023-04-02 16:25:44,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:25:44,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830546128] [2023-04-02 16:25:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:44,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:25:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:25:44,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:25:44,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830546128] [2023-04-02 16:25:44,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830546128] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:25:44,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:25:44,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:25:44,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800354463] [2023-04-02 16:25:44,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:25:44,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:25:44,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:25:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:25:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:25:44,986 INFO L87 Difference]: Start difference. First operand 175 states and 307 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:25:45,398 INFO L93 Difference]: Finished difference Result 533 states and 961 transitions. [2023-04-02 16:25:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 16:25:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 98 [2023-04-02 16:25:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:25:45,402 INFO L225 Difference]: With dead ends: 533 [2023-04-02 16:25:45,402 INFO L226 Difference]: Without dead ends: 363 [2023-04-02 16:25:45,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:25:45,404 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 288 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 16:25:45,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 44 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 16:25:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-04-02 16:25:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2023-04-02 16:25:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.7373134328358208) internal successors, (582), 339 states have internal predecessors, (582), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-02 16:25:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 610 transitions. [2023-04-02 16:25:45,431 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 610 transitions. Word has length 98 [2023-04-02 16:25:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:25:45,431 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 610 transitions. [2023-04-02 16:25:45,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 610 transitions. [2023-04-02 16:25:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 16:25:45,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:25:45,435 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:25:45,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 16:25:45,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:25:45,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:25:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1209131803, now seen corresponding path program 1 times [2023-04-02 16:25:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:25:45,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972286789] [2023-04-02 16:25:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:25:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:25:45,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:25:45,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972286789] [2023-04-02 16:25:45,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972286789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:25:45,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:25:45,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:25:45,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448127513] [2023-04-02 16:25:45,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:25:45,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:25:45,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:25:45,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:25:45,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:25:45,558 INFO L87 Difference]: Start difference. First operand 351 states and 610 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, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 16:25:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:25:45,813 INFO L93 Difference]: Finished difference Result 1039 states and 1862 transitions. [2023-04-02 16:25:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:25:45,813 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, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 99 [2023-04-02 16:25:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:25:45,820 INFO L225 Difference]: With dead ends: 1039 [2023-04-02 16:25:45,820 INFO L226 Difference]: Without dead ends: 693 [2023-04-02 16:25:45,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:25:45,830 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 16:25:45,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 190 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 16:25:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-04-02 16:25:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2023-04-02 16:25:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 666 states have (on average 1.6036036036036037) internal successors, (1068), 673 states have internal predecessors, (1068), 10 states have call successors, (10), 10 states have call predecessors, (10), 16 states have return successors, (73), 9 states have call predecessors, (73), 9 states have call successors, (73) [2023-04-02 16:25:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1151 transitions. [2023-04-02 16:25:45,870 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1151 transitions. Word has length 99 [2023-04-02 16:25:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:25:45,871 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 1151 transitions. [2023-04-02 16:25:45,871 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, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 16:25:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1151 transitions. [2023-04-02 16:25:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 16:25:45,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:25:45,878 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:25:45,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 16:25:45,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:25:45,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:25:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash -520302033, now seen corresponding path program 1 times [2023-04-02 16:25:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:25:45,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051547390] [2023-04-02 16:25:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:45,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:25:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:25:46,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:25:46,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051547390] [2023-04-02 16:25:46,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051547390] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:25:46,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:25:46,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:25:46,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545557109] [2023-04-02 16:25:46,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:25:46,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:25:46,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:25:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:25:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:25:46,021 INFO L87 Difference]: Start difference. First operand 693 states and 1151 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:25:46,426 INFO L93 Difference]: Finished difference Result 1953 states and 3505 transitions. [2023-04-02 16:25:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:25:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 100 [2023-04-02 16:25:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:25:46,436 INFO L225 Difference]: With dead ends: 1953 [2023-04-02 16:25:46,436 INFO L226 Difference]: Without dead ends: 1265 [2023-04-02 16:25:46,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:25:46,445 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 356 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 16:25:46,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 42 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 16:25:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2023-04-02 16:25:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1231. [2023-04-02 16:25:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1175 states have (on average 1.48) internal successors, (1739), 1199 states have internal predecessors, (1739), 16 states have call successors, (16), 16 states have call predecessors, (16), 39 states have return successors, (224), 15 states have call predecessors, (224), 15 states have call successors, (224) [2023-04-02 16:25:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1979 transitions. [2023-04-02 16:25:46,497 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1979 transitions. Word has length 100 [2023-04-02 16:25:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:25:46,498 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1979 transitions. [2023-04-02 16:25:46,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1979 transitions. [2023-04-02 16:25:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-02 16:25:46,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:25:46,503 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:25:46,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 16:25:46,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:25:46,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:25:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1162065459, now seen corresponding path program 1 times [2023-04-02 16:25:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:25:46,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533369093] [2023-04-02 16:25:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:25:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:25:46,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:25:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533369093] [2023-04-02 16:25:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533369093] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:25:46,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:25:46,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:25:46,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073504553] [2023-04-02 16:25:46,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:25:46,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:25:47,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:25:47,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:25:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:25:47,001 INFO L87 Difference]: Start difference. First operand 1231 states and 1979 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:25:47,409 INFO L93 Difference]: Finished difference Result 2581 states and 4193 transitions. [2023-04-02 16:25:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:25:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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 102 [2023-04-02 16:25:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:25:47,417 INFO L225 Difference]: With dead ends: 2581 [2023-04-02 16:25:47,417 INFO L226 Difference]: Without dead ends: 1355 [2023-04-02 16:25:47,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:25:47,421 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 252 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 16:25:47,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 46 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 16:25:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2023-04-02 16:25:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1347. [2023-04-02 16:25:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1273 states have (on average 1.3998428908091123) internal successors, (1782), 1313 states have internal predecessors, (1782), 17 states have call successors, (17), 17 states have call predecessors, (17), 56 states have return successors, (278), 16 states have call predecessors, (278), 16 states have call successors, (278) [2023-04-02 16:25:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2077 transitions. [2023-04-02 16:25:47,466 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2077 transitions. Word has length 102 [2023-04-02 16:25:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:25:47,467 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2077 transitions. [2023-04-02 16:25:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2077 transitions. [2023-04-02 16:25:47,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 16:25:47,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:25:47,474 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:25:47,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 16:25:47,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:25:47,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:25:47,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1281648871, now seen corresponding path program 1 times [2023-04-02 16:25:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:25:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301023564] [2023-04-02 16:25:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:25:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 16:25:47,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:25:47,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301023564] [2023-04-02 16:25:47,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301023564] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:25:47,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353798522] [2023-04-02 16:25:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:47,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:25:47,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:25:47,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 16:25:47,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 16:25:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:47,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 16:25:47,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:25:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 16:25:48,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:25:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 16:25:48,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353798522] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 16:25:48,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 16:25:48,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2023-04-02 16:25:48,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029325603] [2023-04-02 16:25:48,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:25:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 16:25:48,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:25:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 16:25:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 16:25:48,328 INFO L87 Difference]: Start difference. First operand 1347 states and 2077 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:25:48,622 INFO L93 Difference]: Finished difference Result 3333 states and 5314 transitions. [2023-04-02 16:25:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 16:25:48,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 107 [2023-04-02 16:25:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:25:48,631 INFO L225 Difference]: With dead ends: 3333 [2023-04-02 16:25:48,631 INFO L226 Difference]: Without dead ends: 1991 [2023-04-02 16:25:48,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 210 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 16:25:48,635 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 16:25:48,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 27 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 16:25:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2023-04-02 16:25:48,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1985. [2023-04-02 16:25:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1872 states have (on average 1.3814102564102564) internal successors, (2586), 1937 states have internal predecessors, (2586), 24 states have call successors, (24), 24 states have call predecessors, (24), 88 states have return successors, (453), 23 states have call predecessors, (453), 23 states have call successors, (453) [2023-04-02 16:25:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3063 transitions. [2023-04-02 16:25:48,691 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3063 transitions. Word has length 107 [2023-04-02 16:25:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:25:48,692 INFO L495 AbstractCegarLoop]: Abstraction has 1985 states and 3063 transitions. [2023-04-02 16:25:48,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3063 transitions. [2023-04-02 16:25:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 16:25:48,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:25:48,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:25:48,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 16:25:48,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-02 16:25:48,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:25:48,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:25:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1135318830, now seen corresponding path program 1 times [2023-04-02 16:25:48,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:25:48,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209499953] [2023-04-02 16:25:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:48,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:25:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:25:49,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:25:49,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209499953] [2023-04-02 16:25:49,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209499953] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:25:49,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:25:49,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:25:49,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667398286] [2023-04-02 16:25:49,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:25:49,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:25:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:25:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:25:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:25:49,055 INFO L87 Difference]: Start difference. First operand 1985 states and 3063 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:25:49,402 INFO L93 Difference]: Finished difference Result 4439 states and 6966 transitions. [2023-04-02 16:25:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 16:25:49,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 114 [2023-04-02 16:25:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:25:49,411 INFO L225 Difference]: With dead ends: 4439 [2023-04-02 16:25:49,411 INFO L226 Difference]: Without dead ends: 2459 [2023-04-02 16:25:49,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:25:49,415 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 256 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 16:25:49,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 44 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 16:25:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2023-04-02 16:25:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2443. [2023-04-02 16:25:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2301 states have (on average 1.3111690569317689) internal successors, (3017), 2385 states have internal predecessors, (3017), 29 states have call successors, (29), 29 states have call predecessors, (29), 112 states have return successors, (564), 28 states have call predecessors, (564), 28 states have call successors, (564) [2023-04-02 16:25:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3610 transitions. [2023-04-02 16:25:49,479 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3610 transitions. Word has length 114 [2023-04-02 16:25:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:25:49,480 INFO L495 AbstractCegarLoop]: Abstraction has 2443 states and 3610 transitions. [2023-04-02 16:25:49,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:25:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3610 transitions. [2023-04-02 16:25:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-04-02 16:25:49,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:25:49,486 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 16:25:49,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 16:25:49,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:25:49,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:25:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash 671148933, now seen corresponding path program 1 times [2023-04-02 16:25:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:25:49,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381505857] [2023-04-02 16:25:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:25:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 123 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:25:49,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:25:49,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381505857] [2023-04-02 16:25:49,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381505857] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:25:49,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193726595] [2023-04-02 16:25:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:25:49,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:25:49,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:25:49,766 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 16:25:49,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 16:25:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:25:49,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:25:49,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:25:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 16:25:50,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:25:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 16:25:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193726595] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 16:25:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657069064] [2023-04-02 16:25:50,253 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-02 16:25:50,253 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 16:25:50,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 16:25:50,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 16:25:50,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 16:25:50,450 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-04-02 16:27:56,054 WARN L223 SmtUtils]: Spent 1.82m on a formula simplification that was a NOOP. DAG size: 2920 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)