/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/Problem19_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:36:07,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:36:07,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:36:07,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:36:07,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:36:07,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:36:07,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:36:07,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:36:07,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:36:07,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:36:07,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:36:07,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:36:07,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:36:07,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:36:07,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:36:07,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:36:07,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:36:07,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:36:07,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:36:07,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:36:07,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:36:07,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:36:07,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:36:07,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:36:07,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:36:07,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:36:07,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:36:07,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:36:07,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:36:07,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:36:07,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:36:07,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:36:07,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:36:07,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:36:07,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:36:07,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:36:07,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:36:07,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:36:07,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:36:07,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:36:07,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:36:07,561 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 10:36:07,590 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:36:07,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:36:07,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:36:07,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:36:07,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:36:07,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:36:07,592 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:36:07,592 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:36:07,592 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:36:07,592 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:36:07,593 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:36:07,593 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:36:07,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:36:07,594 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:36:07,594 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:36:07,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:36:07,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:36:07,594 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:36:07,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:36:07,595 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:36:07,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:36:07,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:36:07,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:36:07,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:36:07,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:36:07,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:36:07,596 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:36:07,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:36:07,596 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:36:07,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:36:07,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:36:07,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:36:07,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:36:07,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:36:07,597 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:36:07,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:36:07,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:36:07,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:36:07,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:36:07,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:36:07,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:36:07,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:36:07,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:36:07,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:36:07,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:36:07,864 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:36:07,865 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:36:07,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label47.c [2023-04-01 10:36:09,103 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:36:09,624 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:36:09,625 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label47.c [2023-04-01 10:36:09,675 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7fd9d20b/98061f64bf924ecd90ef0c0a25db2ef2/FLAG6355917e0 [2023-04-01 10:36:09,692 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7fd9d20b/98061f64bf924ecd90ef0c0a25db2ef2 [2023-04-01 10:36:09,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:36:09,696 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:36:09,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:36:09,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:36:09,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:36:09,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:09" (1/1) ... [2023-04-01 10:36:09,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@537e7c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:09, skipping insertion in model container [2023-04-01 10:36:09,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:09" (1/1) ... [2023-04-01 10:36:09,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:36:09,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:36:10,147 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/Problem19_label47.c[1580,1593] [2023-04-01 10:36:11,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:36:11,353 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:36:11,373 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/Problem19_label47.c[1580,1593] [2023-04-01 10:36:12,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:36:12,096 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:36:12,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12 WrapperNode [2023-04-01 10:36:12,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:36:12,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:36:12,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:36:12,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:36:12,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:36:12,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:36:12,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:36:12,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:36:12,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (1/1) ... [2023-04-01 10:36:12,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:36:12,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:36:12,578 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 10:36:12,584 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 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:36:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:36:12,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:36:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:36:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:36:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:36:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:36:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:36:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:36:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:36:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:36:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:36:12,677 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:36:12,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:36:20,260 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:36:34,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:36:34,766 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:36:34,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:36:34 BoogieIcfgContainer [2023-04-01 10:36:34,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:36:34,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:36:34,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:36:34,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:36:34,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:36:09" (1/3) ... [2023-04-01 10:36:34,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d632b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:36:34, skipping insertion in model container [2023-04-01 10:36:34,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:12" (2/3) ... [2023-04-01 10:36:34,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d632b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:36:34, skipping insertion in model container [2023-04-01 10:36:34,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:36:34" (3/3) ... [2023-04-01 10:36:34,777 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label47.c [2023-04-01 10:36:34,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:36:34,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:36:34,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:36:34,970 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;@4e862ffc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:36:34,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:36:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:36:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:36:34,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:36:34,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:36:34,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:36:34,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:36:34,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1235541686, now seen corresponding path program 1 times [2023-04-01 10:36:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:36:34,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715499993] [2023-04-01 10:36:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:36:34,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:36:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:36:35,389 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 10:36:35,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:36:35,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715499993] [2023-04-01 10:36:35,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715499993] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:36:35,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:36:35,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:36:35,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888593587] [2023-04-01 10:36:35,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:36:35,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:36:35,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:36:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:36:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:36:35,437 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 10:36:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:36:41,550 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:36:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:36:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-04-01 10:36:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:36:41,583 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:36:41,583 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:36:41,591 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 10:36:41,594 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:36:41,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 10:36:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:36:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 10:36:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 10:36:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-04-01 10:36:41,714 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-04-01 10:36:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:36:41,714 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-04-01 10:36:41,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 10:36:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-04-01 10:36:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:36:41,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:36:41,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:36:41,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:36:41,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:36:41,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:36:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2050672958, now seen corresponding path program 1 times [2023-04-01 10:36:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:36:41,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799649185] [2023-04-01 10:36:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:36:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:36:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:36:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:36:41,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:36:41,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799649185] [2023-04-01 10:36:41,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799649185] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:36:41,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:36:41,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:36:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070921258] [2023-04-01 10:36:41,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:36:41,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:36:41,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:36:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:36:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:36:41,876 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:36:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:36:50,771 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-04-01 10:36:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:36:50,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 10:36:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:36:50,793 INFO L225 Difference]: With dead ends: 6943 [2023-04-01 10:36:50,794 INFO L226 Difference]: Without dead ends: 4679 [2023-04-01 10:36:50,802 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 10:36:50,805 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:36:50,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2023-04-01 10:36:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-04-01 10:36:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-04-01 10:36:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-04-01 10:36:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-04-01 10:36:50,949 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-04-01 10:36:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:36:50,950 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-04-01 10:36:50,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:36:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-04-01 10:36:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:36:50,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:36:50,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:36:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:36:50,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:36:50,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:36:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 789618217, now seen corresponding path program 1 times [2023-04-01 10:36:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:36:50,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487341225] [2023-04-01 10:36:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:36:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:36:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:36:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:36:51,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:36:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487341225] [2023-04-01 10:36:51,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487341225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:36:51,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:36:51,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:36:51,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890212213] [2023-04-01 10:36:51,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:36:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:36:51,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:36:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:36:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:36:51,159 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 10:36:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:36:57,612 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-04-01 10:36:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:36:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 10:36:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:36:57,664 INFO L225 Difference]: With dead ends: 14148 [2023-04-01 10:36:57,664 INFO L226 Difference]: Without dead ends: 9546 [2023-04-01 10:36:57,677 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 10:36:57,680 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:36:57,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-04-01 10:36:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-04-01 10:36:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-04-01 10:36:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-04-01 10:36:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-04-01 10:36:57,925 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-04-01 10:36:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:36:57,926 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-04-01 10:36:57,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 10:36:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-04-01 10:36:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:36:57,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:36:57,927 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:36:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:36:57,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:36:57,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:36:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1098197727, now seen corresponding path program 1 times [2023-04-01 10:36:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:36:57,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053308301] [2023-04-01 10:36:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:36:57,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:36:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:36:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:36:58,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:36:58,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053308301] [2023-04-01 10:36:58,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053308301] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:36:58,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:36:58,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:36:58,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088768816] [2023-04-01 10:36:58,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:36:58,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:36:58,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:36:58,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:36:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:36:58,079 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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)