/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/Problem16_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:23:22,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:23:22,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:23:22,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:23:22,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:23:22,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:23:22,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:23:22,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:23:22,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:23:22,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:23:22,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:23:22,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:23:22,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:23:22,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:23:22,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:23:22,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:23:22,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:23:22,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:23:22,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:23:22,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:23:22,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:23:22,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:23:22,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:23:22,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:23:22,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:23:22,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:23:22,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:23:22,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:23:22,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:23:22,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:23:22,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:23:22,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:23:22,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:23:22,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:23:22,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:23:22,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:23:22,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:23:22,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:23:22,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:23:22,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:23:22,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:23:22,660 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 10:23:22,689 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:23:22,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:23:22,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:23:22,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:23:22,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:23:22,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:23:22,691 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:23:22,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:23:22,691 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:23:22,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:23:22,692 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:23:22,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:23:22,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:23:22,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:23:22,693 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:23:22,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:23:22,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:23:22,693 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:23:22,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:23:22,694 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:23:22,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:23:22,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:23:22,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:23:22,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:23:22,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:23:22,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:23:22,696 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:23:22,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:23:22,696 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:23:22,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:23:22,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:23:22,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:23:22,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:23:22,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:23:22,697 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:23:22,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:23:22,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:23:22,697 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:23:22,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:23:22,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:23:22,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:23:22,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:23:22,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:23:22,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:23:22,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:23:22,941 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:23:22,942 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:23:22,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label55.c [2023-04-01 10:23:24,084 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:23:24,412 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:23:24,412 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label55.c [2023-04-01 10:23:24,432 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f7a08639/c0e8df1f2d81441eaab6663a7ab7386d/FLAG7bacba43f [2023-04-01 10:23:24,446 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f7a08639/c0e8df1f2d81441eaab6663a7ab7386d [2023-04-01 10:23:24,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:23:24,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:23:24,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:23:24,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:23:24,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:23:24,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:23:24" (1/1) ... [2023-04-01 10:23:24,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60813374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:24, skipping insertion in model container [2023-04-01 10:23:24,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:23:24" (1/1) ... [2023-04-01 10:23:24,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:23:24,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:23:24,736 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/Problem16_label55.c[5995,6008] [2023-04-01 10:23:25,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:23:25,109 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:23:25,128 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/Problem16_label55.c[5995,6008] [2023-04-01 10:23:25,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:23:25,274 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:23:25,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25 WrapperNode [2023-04-01 10:23:25,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:23:25,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:23:25,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:23:25,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:23:25,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,413 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:23:25,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:23:25,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:23:25,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:23:25,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (1/1) ... [2023-04-01 10:23:25,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:23:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:23:25,469 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 10:23:25,470 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 10:23:25,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:23:25,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:23:25,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:23:25,507 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:23:25,507 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:23:25,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:23:25,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:23:25,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:23:25,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:23:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:23:25,593 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:23:25,595 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:23:27,346 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:23:28,324 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:23:28,324 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:23:28,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:23:28 BoogieIcfgContainer [2023-04-01 10:23:28,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:23:28,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:23:28,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:23:28,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:23:28,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:23:24" (1/3) ... [2023-04-01 10:23:28,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c2df6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:23:28, skipping insertion in model container [2023-04-01 10:23:28,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:25" (2/3) ... [2023-04-01 10:23:28,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c2df6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:23:28, skipping insertion in model container [2023-04-01 10:23:28,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:23:28" (3/3) ... [2023-04-01 10:23:28,335 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label55.c [2023-04-01 10:23:28,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:23:28,349 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:23:28,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:23:28,408 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;@3e985929, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:23:28,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:23:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:23:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:23:28,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:23:28,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:23:28,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:23:28,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:23:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -510214006, now seen corresponding path program 1 times [2023-04-01 10:23:28,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:23:28,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295104844] [2023-04-01 10:23:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:28,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:23:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:28,741 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 10:23:28,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:23:28,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295104844] [2023-04-01 10:23:28,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295104844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:23:28,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:23:28,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:23:28,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146894290] [2023-04-01 10:23:28,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:23:28,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:23:28,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:23:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:23:28,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:23:28,778 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 10:23:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:23:29,978 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:23:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:23:29,980 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 10:23:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:23:29,994 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:23:29,994 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:23:30,001 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 10:23:30,006 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:23:30,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 60 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 10:23:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:23:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 463. [2023-04-01 10:23:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 453 states have (on average 1.9094922737306843) internal successors, (865), 453 states have internal predecessors, (865), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:23:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 876 transitions. [2023-04-01 10:23:30,079 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 876 transitions. Word has length 11 [2023-04-01 10:23:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:23:30,079 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 876 transitions. [2023-04-01 10:23:30,080 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 10:23:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 876 transitions. [2023-04-01 10:23:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:23:30,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:23:30,081 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 10:23:30,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:23:30,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:23:30,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:23:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1707153163, now seen corresponding path program 1 times [2023-04-01 10:23:30,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:23:30,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430054842] [2023-04-01 10:23:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:30,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:23:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:30,348 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 10:23:30,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:23:30,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430054842] [2023-04-01 10:23:30,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430054842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:23:30,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:23:30,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:23:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812041747] [2023-04-01 10:23:30,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:23:30,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:23:30,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:23:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:23:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:23:30,351 INFO L87 Difference]: Start difference. First operand 463 states and 876 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 10:23:31,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:23:31,717 INFO L93 Difference]: Finished difference Result 1395 states and 2674 transitions. [2023-04-01 10:23:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:23:31,717 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 10:23:31,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:23:31,728 INFO L225 Difference]: With dead ends: 1395 [2023-04-01 10:23:31,729 INFO L226 Difference]: Without dead ends: 937 [2023-04-01 10:23:31,730 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 10:23:31,731 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 891 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:23:31,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 10:23:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2023-04-01 10:23:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 918. [2023-04-01 10:23:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 900 states have (on average 1.7822222222222222) internal successors, (1604), 904 states have internal predecessors, (1604), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-01 10:23:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1637 transitions. [2023-04-01 10:23:31,784 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1637 transitions. Word has length 21 [2023-04-01 10:23:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:23:31,784 INFO L495 AbstractCegarLoop]: Abstraction has 918 states and 1637 transitions. [2023-04-01 10:23:31,784 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 10:23:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1637 transitions. [2023-04-01 10:23:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 10:23:31,785 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:23:31,786 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] [2023-04-01 10:23:31,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:23:31,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:23:31,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:23:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 750882542, now seen corresponding path program 1 times [2023-04-01 10:23:31,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:23:31,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578852443] [2023-04-01 10:23:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:31,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:23:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:31,884 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 10:23:31,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:23:31,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578852443] [2023-04-01 10:23:31,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578852443] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:23:31,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:23:31,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:23:31,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232000555] [2023-04-01 10:23:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:23:31,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:23:31,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:23:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:23:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:23:31,887 INFO L87 Difference]: Start difference. First operand 918 states and 1637 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 10:23:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:23:33,202 INFO L93 Difference]: Finished difference Result 2537 states and 4578 transitions. [2023-04-01 10:23:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:23:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-01 10:23:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:23:33,212 INFO L225 Difference]: With dead ends: 2537 [2023-04-01 10:23:33,212 INFO L226 Difference]: Without dead ends: 1624 [2023-04-01 10:23:33,214 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 10:23:33,215 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 992 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:23:33,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 10:23:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2023-04-01 10:23:33,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1550. [2023-04-01 10:23:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1519 states have (on average 1.5023041474654377) internal successors, (2282), 1528 states have internal predecessors, (2282), 11 states have call successors, (11), 11 states have call predecessors, (11), 19 states have return successors, (67), 10 states have call predecessors, (67), 10 states have call successors, (67) [2023-04-01 10:23:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2360 transitions. [2023-04-01 10:23:33,263 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2360 transitions. Word has length 24 [2023-04-01 10:23:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:23:33,263 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2360 transitions. [2023-04-01 10:23:33,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 10:23:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2360 transitions. [2023-04-01 10:23:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:23:33,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:23:33,264 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] [2023-04-01 10:23:33,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:23:33,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:23:33,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:23:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash 810652966, now seen corresponding path program 1 times [2023-04-01 10:23:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:23:33,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094220815] [2023-04-01 10:23:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:33,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:23:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:33,364 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 10:23:33,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:23:33,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094220815] [2023-04-01 10:23:33,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094220815] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:23:33,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:23:33,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:23:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396483992] [2023-04-01 10:23:33,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:23:33,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:23:33,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:23:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:23:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:23:33,366 INFO L87 Difference]: Start difference. First operand 1550 states and 2360 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 10:23:34,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:23:34,962 INFO L93 Difference]: Finished difference Result 4442 states and 6841 transitions. [2023-04-01 10:23:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:23:34,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-04-01 10:23:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:23:34,980 INFO L225 Difference]: With dead ends: 4442 [2023-04-01 10:23:34,980 INFO L226 Difference]: Without dead ends: 2897 [2023-04-01 10:23:34,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:23:34,993 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 720 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:23:34,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 43 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 10:23:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2023-04-01 10:23:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2837. [2023-04-01 10:23:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2782 states have (on average 1.445003594536305) internal successors, (4020), 2803 states have internal predecessors, (4020), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (217), 16 states have call predecessors, (217), 16 states have call successors, (217) [2023-04-01 10:23:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 4254 transitions. [2023-04-01 10:23:35,094 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 4254 transitions. Word has length 28 [2023-04-01 10:23:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:23:35,095 INFO L495 AbstractCegarLoop]: Abstraction has 2837 states and 4254 transitions. [2023-04-01 10:23:35,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 10:23:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 4254 transitions. [2023-04-01 10:23:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 10:23:35,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:23:35,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:23:35,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:23:35,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:23:35,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:23:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash -198401537, now seen corresponding path program 1 times [2023-04-01 10:23:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:23:35,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863112501] [2023-04-01 10:23:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:35,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:23:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:35,216 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 10:23:35,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:23:35,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863112501] [2023-04-01 10:23:35,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863112501] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:23:35,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:23:35,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:23:35,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444048894] [2023-04-01 10:23:35,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:23:35,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:23:35,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:23:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:23:35,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:23:35,219 INFO L87 Difference]: Start difference. First operand 2837 states and 4254 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:23:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:23:36,159 INFO L93 Difference]: Finished difference Result 6986 states and 10600 transitions. [2023-04-01 10:23:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:23:36,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-04-01 10:23:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:23:36,179 INFO L225 Difference]: With dead ends: 6986 [2023-04-01 10:23:36,180 INFO L226 Difference]: Without dead ends: 4154 [2023-04-01 10:23:36,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:23:36,191 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 266 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:23:36,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 423 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 10:23:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2023-04-01 10:23:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3871. [2023-04-01 10:23:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3804 states have (on average 1.3656677181913774) internal successors, (5195), 3827 states have internal predecessors, (5195), 22 states have call successors, (22), 22 states have call predecessors, (22), 44 states have return successors, (299), 21 states have call predecessors, (299), 21 states have call successors, (299) [2023-04-01 10:23:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 5516 transitions. [2023-04-01 10:23:36,308 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 5516 transitions. Word has length 43 [2023-04-01 10:23:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:23:36,309 INFO L495 AbstractCegarLoop]: Abstraction has 3871 states and 5516 transitions. [2023-04-01 10:23:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:23:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 5516 transitions. [2023-04-01 10:23:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 10:23:36,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:23:36,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:23:36,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:23:36,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:23:36,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:23:36,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1342134902, now seen corresponding path program 1 times [2023-04-01 10:23:36,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:23:36,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358646207] [2023-04-01 10:23:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:36,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:23:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 10:23:36,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:23:36,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358646207] [2023-04-01 10:23:36,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358646207] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:23:36,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139641670] [2023-04-01 10:23:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:36,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:23:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:23:36,533 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 10:23:36,537 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 10:23:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:36,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:23:36,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:23:36,721 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 10:23:36,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:23:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139641670] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:23:36,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:23:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 10:23:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535955406] [2023-04-01 10:23:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:23:36,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:23:36,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:23:36,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:23:36,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:23:36,733 INFO L87 Difference]: Start difference. First operand 3871 states and 5516 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:23:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:23:37,720 INFO L93 Difference]: Finished difference Result 4926 states and 6876 transitions. [2023-04-01 10:23:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:23:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-04-01 10:23:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:23:37,742 INFO L225 Difference]: With dead ends: 4926 [2023-04-01 10:23:37,743 INFO L226 Difference]: Without dead ends: 4924 [2023-04-01 10:23:37,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:23:37,745 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 247 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:23:37,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 148 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 10:23:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4924 states. [2023-04-01 10:23:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 3891. [2023-04-01 10:23:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3820 states have (on average 1.3638743455497382) internal successors, (5210), 3841 states have internal predecessors, (5210), 25 states have call successors, (25), 25 states have call predecessors, (25), 45 states have return successors, (348), 24 states have call predecessors, (348), 24 states have call successors, (348) [2023-04-01 10:23:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 5583 transitions. [2023-04-01 10:23:37,878 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 5583 transitions. Word has length 52 [2023-04-01 10:23:37,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:23:37,878 INFO L495 AbstractCegarLoop]: Abstraction has 3891 states and 5583 transitions. [2023-04-01 10:23:37,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:23:37,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 5583 transitions. [2023-04-01 10:23:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 10:23:37,884 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:23:37,884 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:23:37,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:23:38,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 10:23:38,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:23:38,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:23:38,093 INFO L85 PathProgramCache]: Analyzing trace with hash -399567564, now seen corresponding path program 1 times [2023-04-01 10:23:38,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:23:38,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335041955] [2023-04-01 10:23:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:38,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:23:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 73 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 10:23:38,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:23:38,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335041955] [2023-04-01 10:23:38,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335041955] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:23:38,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492596566] [2023-04-01 10:23:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:23:38,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:23:38,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:23:38,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:23:38,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:23:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:23:38,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:23:38,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:23:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:23:38,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:23:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 73 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 10:23:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492596566] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:23:39,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449446383] [2023-04-01 10:23:39,094 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 10:23:39,095 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:23:39,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:23:39,101 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:23:39,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:23:39,364 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs [2023-04-01 10:23:39,693 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 51 [2023-04-01 10:23:41,677 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 10:23:41,860 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 33128 conjuctions. This might take some time... [2023-04-01 10:23:51,511 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 3838 conjuctions. [2023-04-01 10:23:57,881 WARN L223 SmtUtils]: Spent 5.35s on a formula simplification that was a NOOP. DAG size: 730 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)