/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/Problem01_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:17:16,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:17:16,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:17:16,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:17:16,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:17:16,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:17:16,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:17:16,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:17:16,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:17:16,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:17:16,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:17:16,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:17:16,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:17:16,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:17:16,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:17:16,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:17:16,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:17:16,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:17:16,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:17:16,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:17:16,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:17:16,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:17:16,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:17:16,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:17:16,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:17:16,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:17:16,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:17:16,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:17:16,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:17:16,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:17:16,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:17:16,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:17:16,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:17:16,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:17:16,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:17:16,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:17:16,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:17:16,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:17:16,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:17:16,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:17:16,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:17:16,565 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 09:17:16,588 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:17:16,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:17:16,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:17:16,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:17:16,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:17:16,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:17:16,589 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:17:16,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:17:16,590 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:17:16,590 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:17:16,590 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:17:16,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:17:16,591 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:17:16,591 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:17:16,591 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:17:16,591 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:17:16,591 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:17:16,591 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:17:16,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:17:16,591 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:17:16,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:17:16,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:17:16,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:17:16,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:17:16,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:17:16,593 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:17:16,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:17:16,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:17:16,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:17:16,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:17:16,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:17:16,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:17:16,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:17:16,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:17:16,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:17:16,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:17:16,837 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:17:16,837 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:17:16,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label57.c [2023-04-01 09:17:17,904 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:17:18,107 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:17:18,108 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label57.c [2023-04-01 09:17:18,126 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09afcad5f/33c92ba90e804fdbbd27696cbf6c389e/FLAG2b913a40d [2023-04-01 09:17:18,142 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09afcad5f/33c92ba90e804fdbbd27696cbf6c389e [2023-04-01 09:17:18,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:17:18,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:17:18,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:17:18,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:17:18,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:17:18,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a24872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18, skipping insertion in model container [2023-04-01 09:17:18,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:17:18,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:17:18,415 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label57.c[15253,15266] [2023-04-01 09:17:18,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:17:18,461 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:17:18,508 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label57.c[15253,15266] [2023-04-01 09:17:18,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:17:18,545 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:17:18,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18 WrapperNode [2023-04-01 09:17:18,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:17:18,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:17:18,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:17:18,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:17:18,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:17:18,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:17:18,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:17:18,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:17:18,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (1/1) ... [2023-04-01 09:17:18,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:17:18,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:18,679 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 09:17:18,688 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 09:17:18,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:17:18,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:17:18,711 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:17:18,711 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:17:18,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:17:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:17:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:17:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:17:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:17:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:17:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:17:18,789 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:17:18,790 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:17:19,524 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:17:19,692 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:17:19,692 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:17:19,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:17:19 BoogieIcfgContainer [2023-04-01 09:17:19,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:17:19,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:17:19,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:17:19,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:17:19,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:17:18" (1/3) ... [2023-04-01 09:17:19,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381af14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:17:19, skipping insertion in model container [2023-04-01 09:17:19,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:18" (2/3) ... [2023-04-01 09:17:19,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381af14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:17:19, skipping insertion in model container [2023-04-01 09:17:19,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:17:19" (3/3) ... [2023-04-01 09:17:19,702 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label57.c [2023-04-01 09:17:19,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:17:19,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:17:19,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:17:19,760 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;@ec12f45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:17:19,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:17:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:17:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 09:17:19,770 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:19,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:19,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:19,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1123963668, now seen corresponding path program 1 times [2023-04-01 09:17:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51325521] [2023-04-01 09:17:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:19,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:20,232 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 09:17:20,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:20,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51325521] [2023-04-01 09:17:20,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51325521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:20,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:20,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:17:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651231312] [2023-04-01 09:17:20,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:17:20,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:17:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:17:20,270 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:17:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:20,584 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 09:17:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:17:20,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-01 09:17:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:20,597 INFO L225 Difference]: With dead ends: 246 [2023-04-01 09:17:20,597 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 09:17:20,600 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 09:17:20,604 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:20,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 09:17:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 09:17:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 149 states have internal predecessors, (264), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:17:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-04-01 09:17:20,663 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-04-01 09:17:20,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:20,663 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-04-01 09:17:20,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:17:20,663 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-04-01 09:17:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:17:20,666 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:20,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:20,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:17:20,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:20,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1660027994, now seen corresponding path program 1 times [2023-04-01 09:17:20,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:20,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295292516] [2023-04-01 09:17:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:20,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:20,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295292516] [2023-04-01 09:17:20,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295292516] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:20,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:20,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:20,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090362819] [2023-04-01 09:17:20,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:20,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:20,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:20,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:20,886 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:17:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:21,223 INFO L93 Difference]: Finished difference Result 485 states and 861 transitions. [2023-04-01 09:17:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:17:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86 [2023-04-01 09:17:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:21,227 INFO L225 Difference]: With dead ends: 485 [2023-04-01 09:17:21,228 INFO L226 Difference]: Without dead ends: 333 [2023-04-01 09:17:21,233 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 09:17:21,235 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 297 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:21,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 44 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-04-01 09:17:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 315. [2023-04-01 09:17:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 299 states have (on average 1.648829431438127) internal successors, (493), 303 states have internal predecessors, (493), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 09:17:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 520 transitions. [2023-04-01 09:17:21,259 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 520 transitions. Word has length 86 [2023-04-01 09:17:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:21,260 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 520 transitions. [2023-04-01 09:17:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:17:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 520 transitions. [2023-04-01 09:17:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 09:17:21,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:21,263 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] [2023-04-01 09:17:21,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:17:21,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:21,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 56735902, now seen corresponding path program 1 times [2023-04-01 09:17:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:21,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903289592] [2023-04-01 09:17:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:21,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:21,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:21,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903289592] [2023-04-01 09:17:21,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903289592] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:21,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:21,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:21,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642631205] [2023-04-01 09:17:21,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:21,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:21,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:21,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:21,465 INFO L87 Difference]: Start difference. First operand 315 states and 520 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 09:17:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:21,782 INFO L93 Difference]: Finished difference Result 973 states and 1695 transitions. [2023-04-01 09:17:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:17:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 90 [2023-04-01 09:17:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:21,786 INFO L225 Difference]: With dead ends: 973 [2023-04-01 09:17:21,786 INFO L226 Difference]: Without dead ends: 663 [2023-04-01 09:17:21,787 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 09:17:21,787 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 263 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:21,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 39 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-04-01 09:17:21,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 637. [2023-04-01 09:17:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 602 states have (on average 1.6046511627906976) internal successors, (966), 617 states have internal predecessors, (966), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (79), 9 states have call predecessors, (79), 9 states have call successors, (79) [2023-04-01 09:17:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1055 transitions. [2023-04-01 09:17:21,831 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1055 transitions. Word has length 90 [2023-04-01 09:17:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:21,832 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1055 transitions. [2023-04-01 09:17:21,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 09:17:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1055 transitions. [2023-04-01 09:17:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:17:21,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:21,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:21,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:17:21,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:21,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1608764010, now seen corresponding path program 1 times [2023-04-01 09:17:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:21,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425242887] [2023-04-01 09:17:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:22,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:22,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425242887] [2023-04-01 09:17:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425242887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:22,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:22,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:22,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075540918] [2023-04-01 09:17:22,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:22,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:22,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:22,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:22,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:22,101 INFO L87 Difference]: Start difference. First operand 637 states and 1055 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:17:22,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:22,426 INFO L93 Difference]: Finished difference Result 1388 states and 2341 transitions. [2023-04-01 09:17:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:17:22,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2023-04-01 09:17:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:22,441 INFO L225 Difference]: With dead ends: 1388 [2023-04-01 09:17:22,442 INFO L226 Difference]: Without dead ends: 756 [2023-04-01 09:17:22,443 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 09:17:22,449 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 241 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:22,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 44 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-04-01 09:17:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 740. [2023-04-01 09:17:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 689 states have (on average 1.5021770682148041) internal successors, (1035), 718 states have internal predecessors, (1035), 11 states have call successors, (11), 11 states have call predecessors, (11), 39 states have return successors, (113), 10 states have call predecessors, (113), 10 states have call successors, (113) [2023-04-01 09:17:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1159 transitions. [2023-04-01 09:17:22,487 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1159 transitions. Word has length 94 [2023-04-01 09:17:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:22,487 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1159 transitions. [2023-04-01 09:17:22,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:17:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1159 transitions. [2023-04-01 09:17:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 09:17:22,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:22,490 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] [2023-04-01 09:17:22,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:17:22,491 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:22,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash 412220434, now seen corresponding path program 1 times [2023-04-01 09:17:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:22,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171976322] [2023-04-01 09:17:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:22,783 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 09:17:22,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:22,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171976322] [2023-04-01 09:17:22,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171976322] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:22,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:22,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:22,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444848914] [2023-04-01 09:17:22,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:22,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:22,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:22,787 INFO L87 Difference]: Start difference. First operand 740 states and 1159 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 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 09:17:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:23,208 INFO L93 Difference]: Finished difference Result 1742 states and 2746 transitions. [2023-04-01 09:17:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:17:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 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 96 [2023-04-01 09:17:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:23,212 INFO L225 Difference]: With dead ends: 1742 [2023-04-01 09:17:23,212 INFO L226 Difference]: Without dead ends: 1007 [2023-04-01 09:17:23,213 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 09:17:23,214 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:23,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 52 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:17:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2023-04-01 09:17:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 991. [2023-04-01 09:17:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 921 states have (on average 1.4147665580890336) internal successors, (1303), 963 states have internal predecessors, (1303), 14 states have call successors, (14), 14 states have call predecessors, (14), 55 states have return successors, (168), 13 states have call predecessors, (168), 13 states have call successors, (168) [2023-04-01 09:17:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1485 transitions. [2023-04-01 09:17:23,240 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1485 transitions. Word has length 96 [2023-04-01 09:17:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:23,240 INFO L495 AbstractCegarLoop]: Abstraction has 991 states and 1485 transitions. [2023-04-01 09:17:23,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 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 09:17:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1485 transitions. [2023-04-01 09:17:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 09:17:23,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:23,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:23,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:17:23,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:23,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 885040708, now seen corresponding path program 1 times [2023-04-01 09:17:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546935628] [2023-04-01 09:17:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:23,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:23,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546935628] [2023-04-01 09:17:23,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546935628] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:17:23,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794856666] [2023-04-01 09:17:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:23,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:23,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:23,364 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 09:17:23,388 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 09:17:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:23,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:17:23,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:17:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:23,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:17:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:23,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794856666] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:17:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1971125079] [2023-04-01 09:17:23,742 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 09:17:23,742 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:17:23,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:17:23,749 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:17:23,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:17:24,160 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2023-04-01 09:17:51,675 WARN L223 SmtUtils]: Spent 20.87s on a formula simplification. DAG size of input: 1232 DAG size of output: 1230 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)