/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:19:02,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:19:02,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:19:02,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:19:02,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:19:02,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:19:02,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:19:02,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:19:02,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:19:02,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:19:02,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:19:02,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:19:02,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:19:02,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:19:02,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:19:02,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:19:02,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:19:02,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:19:02,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:19:02,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:19:02,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:19:02,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:19:02,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:19:02,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:19:02,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:19:02,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:19:02,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:19:02,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:19:02,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:19:02,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:19:02,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:19:02,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:19:02,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:19:02,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:19:02,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:19:02,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:19:02,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:19:02,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:19:02,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:19:02,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:19:02,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:19:02,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:19:02,468 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:19:02,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:19:02,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:19:02,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:19:02,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:19:02,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:19:02,470 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:19:02,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:19:02,471 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:19:02,471 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:19:02,472 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:19:02,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:19:02,472 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:19:02,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:19:02,472 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:19:02,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:19:02,473 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:19:02,473 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:19:02,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:19:02,474 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:19:02,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:19:02,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:19:02,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:19:02,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:19:02,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:19:02,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:19:02,475 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:19:02,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:19:02,475 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:19:02,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:19:02,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:19:02,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:19:02,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:19:02,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:19:02,476 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:19:02,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:19:02,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:19:02,477 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:19:02,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:19:02,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:19:02,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:19:02,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:19:02,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:19:02,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:19:02,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:19:02,712 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:19:02,713 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:19:02,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label19.c [2023-04-01 09:19:03,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:19:04,135 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:19:04,136 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label19.c [2023-04-01 09:19:04,164 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2bb6101c/1eff23487490470b8f8158cda346e1ea/FLAG017c3e16b [2023-04-01 09:19:04,178 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2bb6101c/1eff23487490470b8f8158cda346e1ea [2023-04-01 09:19:04,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:19:04,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:19:04,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:19:04,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:19:04,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:19:04,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3706ccc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04, skipping insertion in model container [2023-04-01 09:19:04,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:19:04,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:19:04,454 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_label19.c[15877,15890] [2023-04-01 09:19:04,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:19:04,510 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:19:04,641 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_label19.c[15877,15890] [2023-04-01 09:19:04,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:19:04,678 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:19:04,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04 WrapperNode [2023-04-01 09:19:04,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:19:04,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:19:04,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:19:04,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:19:04,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,780 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:19:04,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:19:04,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:19:04,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:19:04,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (1/1) ... [2023-04-01 09:19:04,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:19:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:19:04,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:19:04,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:19:04,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:19:04,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:19:04,850 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:19:04,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:19:04,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:19:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:19:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:19:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:19:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:19:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:19:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:19:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:19:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:19:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:19:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:19:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:19:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:19:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:19:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:19:04,912 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:19:04,914 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:19:05,785 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:19:06,022 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:19:06,022 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:19:06,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:19:06 BoogieIcfgContainer [2023-04-01 09:19:06,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:19:06,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:19:06,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:19:06,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:19:06,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:19:04" (1/3) ... [2023-04-01 09:19:06,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4c13ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:19:06, skipping insertion in model container [2023-04-01 09:19:06,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:04" (2/3) ... [2023-04-01 09:19:06,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4c13ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:19:06, skipping insertion in model container [2023-04-01 09:19:06,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:19:06" (3/3) ... [2023-04-01 09:19:06,050 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label19.c [2023-04-01 09:19:06,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:19:06,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:19:06,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:19:06,108 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;@327b5eed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:19:06,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:19:06,112 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) [2023-04-01 09:19:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:19:06,121 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:06,121 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] [2023-04-01 09:19:06,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:06,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -818171817, now seen corresponding path program 1 times [2023-04-01 09:19:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:06,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828766737] [2023-04-01 09:19:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:06,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:06,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:06,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828766737] [2023-04-01 09:19:06,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828766737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:06,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:06,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:19:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804030515] [2023-04-01 09:19:06,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:06,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:19:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:06,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:19:06,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:19:06,934 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) [2023-04-01 09:19:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:07,388 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:19:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:19:07,390 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 [2023-04-01 09:19:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:07,403 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:19:07,403 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:19:07,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:19:07,412 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:07,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:19:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:19:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:19:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.844311377245509) internal successors, (308), 167 states have internal predecessors, (308), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:19:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2023-04-01 09:19:07,481 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2023-04-01 09:19:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:07,482 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2023-04-01 09:19:07,483 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) [2023-04-01 09:19:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2023-04-01 09:19:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 09:19:07,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:07,492 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:19:07,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:19:07,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:07,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1950718739, now seen corresponding path program 1 times [2023-04-01 09:19:07,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:07,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021099288] [2023-04-01 09:19:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:07,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:07,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:07,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021099288] [2023-04-01 09:19:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021099288] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:07,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:07,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:19:07,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054397562] [2023-04-01 09:19:07,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:07,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:19:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:19:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:19:07,794 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:19:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:08,255 INFO L93 Difference]: Finished difference Result 533 states and 985 transitions. [2023-04-01 09:19:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:19:08,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 104 [2023-04-01 09:19:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:08,259 INFO L225 Difference]: With dead ends: 533 [2023-04-01 09:19:08,259 INFO L226 Difference]: Without dead ends: 363 [2023-04-01 09:19:08,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:19:08,261 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 271 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:08,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 46 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:19:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-04-01 09:19:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 355. [2023-04-01 09:19:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 337 states have (on average 1.7299703264094954) internal successors, (583), 343 states have internal predecessors, (583), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-04-01 09:19:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 616 transitions. [2023-04-01 09:19:08,303 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 616 transitions. Word has length 104 [2023-04-01 09:19:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:08,304 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 616 transitions. [2023-04-01 09:19:08,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:19:08,304 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 616 transitions. [2023-04-01 09:19:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 09:19:08,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:08,317 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:19:08,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:19:08,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:08,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:08,318 INFO L85 PathProgramCache]: Analyzing trace with hash 978674152, now seen corresponding path program 1 times [2023-04-01 09:19:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:08,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877964480] [2023-04-01 09:19:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:08,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:08,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:08,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877964480] [2023-04-01 09:19:08,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877964480] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:08,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:08,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:19:08,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99293604] [2023-04-01 09:19:08,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:08,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:19:08,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:19:08,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:19:08,563 INFO L87 Difference]: Start difference. First operand 355 states and 616 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:19:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:08,981 INFO L93 Difference]: Finished difference Result 1007 states and 1862 transitions. [2023-04-01 09:19:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:19:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 105 [2023-04-01 09:19:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:08,990 INFO L225 Difference]: With dead ends: 1007 [2023-04-01 09:19:08,990 INFO L226 Difference]: Without dead ends: 657 [2023-04-01 09:19:08,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:19:09,000 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 346 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:09,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 42 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:19:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-04-01 09:19:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 637. [2023-04-01 09:19:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 598 states have (on average 1.580267558528428) internal successors, (945), 619 states have internal predecessors, (945), 9 states have call successors, (9), 9 states have call predecessors, (9), 29 states have return successors, (100), 8 states have call predecessors, (100), 8 states have call successors, (100) [2023-04-01 09:19:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1054 transitions. [2023-04-01 09:19:09,060 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1054 transitions. Word has length 105 [2023-04-01 09:19:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:09,062 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1054 transitions. [2023-04-01 09:19:09,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:19:09,062 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1054 transitions. [2023-04-01 09:19:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 09:19:09,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:09,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 09:19:09,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:19:09,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:09,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash 76746674, now seen corresponding path program 1 times [2023-04-01 09:19:09,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:09,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592119940] [2023-04-01 09:19:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:09,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:09,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:09,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592119940] [2023-04-01 09:19:09,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592119940] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:09,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:09,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:19:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830161032] [2023-04-01 09:19:09,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:19:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:19:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:19:09,307 INFO L87 Difference]: Start difference. First operand 637 states and 1054 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:19:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:09,524 INFO L93 Difference]: Finished difference Result 1293 states and 2296 transitions. [2023-04-01 09:19:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 09:19:09,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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 123 [2023-04-01 09:19:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:09,528 INFO L225 Difference]: With dead ends: 1293 [2023-04-01 09:19:09,528 INFO L226 Difference]: Without dead ends: 661 [2023-04-01 09:19:09,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:19:09,531 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 246 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:09,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 24 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:19:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-04-01 09:19:09,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 633. [2023-04-01 09:19:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 596 states have (on average 1.4647651006711409) internal successors, (873), 615 states have internal predecessors, (873), 9 states have call successors, (9), 9 states have call predecessors, (9), 27 states have return successors, (89), 8 states have call predecessors, (89), 8 states have call successors, (89) [2023-04-01 09:19:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 971 transitions. [2023-04-01 09:19:09,556 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 971 transitions. Word has length 123 [2023-04-01 09:19:09,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:09,557 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 971 transitions. [2023-04-01 09:19:09,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:19:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 971 transitions. [2023-04-01 09:19:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 09:19:09,559 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:09,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:19:09,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:19:09,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:09,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1622254130, now seen corresponding path program 1 times [2023-04-01 09:19:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:09,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081192646] [2023-04-01 09:19:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:19:09,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:09,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081192646] [2023-04-01 09:19:09,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081192646] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:19:09,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9350681] [2023-04-01 09:19:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:09,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:19:09,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:19:09,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:19:09,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:19:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:09,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:19:09,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:19:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 09:19:10,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:19:10,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9350681] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:10,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:19:10,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:19:10,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291761792] [2023-04-01 09:19:10,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:10,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:19:10,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:10,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:19:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:19:10,041 INFO L87 Difference]: Start difference. First operand 633 states and 971 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:19:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:10,444 INFO L93 Difference]: Finished difference Result 1625 states and 2561 transitions. [2023-04-01 09:19:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:19:10,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 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 132 [2023-04-01 09:19:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:10,449 INFO L225 Difference]: With dead ends: 1625 [2023-04-01 09:19:10,449 INFO L226 Difference]: Without dead ends: 997 [2023-04-01 09:19:10,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 09:19:10,451 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 222 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:10,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 52 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:19:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-04-01 09:19:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 903. [2023-04-01 09:19:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 851 states have (on average 1.3313748531139835) internal successors, (1133), 879 states have internal predecessors, (1133), 12 states have call successors, (12), 12 states have call predecessors, (12), 39 states have return successors, (139), 11 states have call predecessors, (139), 11 states have call successors, (139) [2023-04-01 09:19:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1284 transitions. [2023-04-01 09:19:10,479 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1284 transitions. Word has length 132 [2023-04-01 09:19:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:10,480 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1284 transitions. [2023-04-01 09:19:10,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:19:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1284 transitions. [2023-04-01 09:19:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 09:19:10,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:10,483 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:19:10,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:19:10,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:19:10,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:10,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 939477638, now seen corresponding path program 1 times [2023-04-01 09:19:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:10,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858820866] [2023-04-01 09:19:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:10,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:19:10,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:10,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858820866] [2023-04-01 09:19:10,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858820866] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:19:10,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562959415] [2023-04-01 09:19:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:10,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:19:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:19:10,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:19:10,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:19:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:10,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:19:10,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:19:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:19:11,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:19:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:19:11,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562959415] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:19:11,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [862125683] [2023-04-01 09:19:11,208 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:19:11,208 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:19:11,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:19:11,215 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:19:11,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:19:11,601 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs