/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/Problem03_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:26:14,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:26:14,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:26:14,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:26:14,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:26:14,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:26:14,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:26:14,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:26:14,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:26:14,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:26:14,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:26:14,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:26:14,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:26:14,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:26:14,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:26:14,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:26:14,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:26:14,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:26:14,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:26:14,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:26:14,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:26:14,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:26:14,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:26:14,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:26:14,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:26:14,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:26:14,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:26:14,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:26:14,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:26:14,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:26:14,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:26:14,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:26:14,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:26:14,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:26:14,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:26:14,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:26:14,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:26:14,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:26:14,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:26:14,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:26:14,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:26:14,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:26:14,633 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:26:14,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:26:14,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:26:14,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:26:14,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:26:14,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:26:14,635 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:26:14,635 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:26:14,635 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:26:14,635 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:26:14,636 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:26:14,636 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:26:14,636 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:26:14,636 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:26:14,637 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:26:14,637 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:26:14,637 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:26:14,637 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:26:14,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:26:14,638 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:26:14,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:26:14,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:26:14,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:26:14,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:26:14,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:26:14,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:26:14,644 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:26:14,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:26:14,644 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:26:14,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:26:14,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:26:14,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:26:14,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:26:14,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:26:14,645 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:26:14,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:26:14,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:26:14,645 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:26:14,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:26:14,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:26:14,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:26:14,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:26:14,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:26:14,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:26:14,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:26:14,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:26:14,843 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:26:14,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2023-04-01 09:26:16,077 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:26:16,476 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:26:16,477 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2023-04-01 09:26:16,494 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98993dc87/f0a02f25a8d3431b8e5b541cda4cafb6/FLAG21b14d669 [2023-04-01 09:26:16,508 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98993dc87/f0a02f25a8d3431b8e5b541cda4cafb6 [2023-04-01 09:26:16,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:26:16,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:26:16,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:26:16,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:26:16,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:26:16,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:26:16" (1/1) ... [2023-04-01 09:26:16,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e625d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:16, skipping insertion in model container [2023-04-01 09:26:16,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:26:16" (1/1) ... [2023-04-01 09:26:16,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:26:16,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:26:16,989 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/Problem03_label41.c[58800,58813] [2023-04-01 09:26:17,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:26:17,039 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:26:17,201 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/Problem03_label41.c[58800,58813] [2023-04-01 09:26:17,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:26:17,226 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:26:17,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17 WrapperNode [2023-04-01 09:26:17,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:26:17,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:26:17,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:26:17,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:26:17,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:26:17,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:26:17,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:26:17,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:26:17,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (1/1) ... [2023-04-01 09:26:17,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:26:17,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:26:17,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:26:17,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:26:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:26:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:26:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:26:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:26:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:26:17,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:26:17,476 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:26:17,476 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:26:17,476 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:26:17,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:26:17,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:26:17,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:26:17,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:26:17,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:26:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:26:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:26:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:26:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:26:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:26:17,617 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:26:17,619 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:26:19,072 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:26:19,368 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:26:19,368 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:26:19,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:26:19 BoogieIcfgContainer [2023-04-01 09:26:19,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:26:19,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:26:19,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:26:19,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:26:19,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:26:16" (1/3) ... [2023-04-01 09:26:19,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c5fefa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:26:19, skipping insertion in model container [2023-04-01 09:26:19,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:26:17" (2/3) ... [2023-04-01 09:26:19,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c5fefa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:26:19, skipping insertion in model container [2023-04-01 09:26:19,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:26:19" (3/3) ... [2023-04-01 09:26:19,378 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label41.c [2023-04-01 09:26:19,394 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:26:19,394 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:26:19,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:26:19,440 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;@5f04c8fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:26:19,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:26:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:26:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:26:19,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:26:19,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:26:19,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:26:19,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:26:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash 597539318, now seen corresponding path program 1 times [2023-04-01 09:26:19,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:26:19,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583848326] [2023-04-01 09:26:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:26:19,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:26:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:26:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:26:20,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:26:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583848326] [2023-04-01 09:26:20,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583848326] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:26:20,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:26:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:26:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463266995] [2023-04-01 09:26:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:26:20,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:26:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:26:20,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:26:20,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:26:20,554 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:26:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:26:21,192 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 09:26:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:26:21,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-01 09:26:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:26:21,210 INFO L225 Difference]: With dead ends: 462 [2023-04-01 09:26:21,210 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 09:26:21,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:26:21,220 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:26:21,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:26:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 09:26:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 09:26:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.9112627986348123) internal successors, (560), 293 states have internal predecessors, (560), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:26:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2023-04-01 09:26:21,281 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2023-04-01 09:26:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:26:21,283 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2023-04-01 09:26:21,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:26:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2023-04-01 09:26:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 09:26:21,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:26:21,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:26:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:26:21,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:26:21,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:26:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash 316769871, now seen corresponding path program 1 times [2023-04-01 09:26:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:26:21,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051841882] [2023-04-01 09:26:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:26:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:26:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:26:21,870 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 09:26:21,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:26:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051841882] [2023-04-01 09:26:21,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051841882] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:26:21,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:26:21,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:26:21,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109018673] [2023-04-01 09:26:21,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:26:21,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:26:21,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:26:21,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:26:21,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:26:21,877 INFO L87 Difference]: Start difference. First operand 301 states and 569 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:26:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:26:22,723 INFO L93 Difference]: Finished difference Result 919 states and 1752 transitions. [2023-04-01 09:26:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:26:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 157 [2023-04-01 09:26:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:26:22,728 INFO L225 Difference]: With dead ends: 919 [2023-04-01 09:26:22,729 INFO L226 Difference]: Without dead ends: 623 [2023-04-01 09:26:22,730 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 09:26:22,731 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 531 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:26:22,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 46 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:26:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-04-01 09:26:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 603. [2023-04-01 09:26:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.7393526405451447) internal successors, (1021), 591 states have internal predecessors, (1021), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 09:26:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1048 transitions. [2023-04-01 09:26:22,781 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1048 transitions. Word has length 157 [2023-04-01 09:26:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:26:22,781 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1048 transitions. [2023-04-01 09:26:22,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:26:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1048 transitions. [2023-04-01 09:26:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 09:26:22,786 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:26:22,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:26:22,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:26:22,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:26:22,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:26:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash -848543275, now seen corresponding path program 1 times [2023-04-01 09:26:22,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:26:22,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671371714] [2023-04-01 09:26:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:26:22,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:26:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:26:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:26:23,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:26:23,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671371714] [2023-04-01 09:26:23,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671371714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:26:23,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:26:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:26:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615000205] [2023-04-01 09:26:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:26:23,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:26:23,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:26:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:26:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:26:23,229 INFO L87 Difference]: Start difference. First operand 603 states and 1048 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:26:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:26:24,072 INFO L93 Difference]: Finished difference Result 1857 states and 3314 transitions. [2023-04-01 09:26:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:26:24,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-01 09:26:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:26:24,081 INFO L225 Difference]: With dead ends: 1857 [2023-04-01 09:26:24,081 INFO L226 Difference]: Without dead ends: 1259 [2023-04-01 09:26:24,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:26:24,086 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 492 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:26:24,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 48 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:26:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2023-04-01 09:26:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1233. [2023-04-01 09:26:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1188 states have (on average 1.6885521885521886) internal successors, (2006), 1213 states have internal predecessors, (2006), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (106), 9 states have call predecessors, (106), 9 states have call successors, (106) [2023-04-01 09:26:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2122 transitions. [2023-04-01 09:26:24,141 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2122 transitions. Word has length 161 [2023-04-01 09:26:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:26:24,141 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 2122 transitions. [2023-04-01 09:26:24,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:26:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2122 transitions. [2023-04-01 09:26:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-01 09:26:24,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:26:24,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:26:24,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:26:24,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:26:24,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:26:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash -747238113, now seen corresponding path program 1 times [2023-04-01 09:26:24,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:26:24,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772459576] [2023-04-01 09:26:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:26:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:26:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:26:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:26:24,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:26:24,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772459576] [2023-04-01 09:26:24,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772459576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:26:24,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:26:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:26:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210036728] [2023-04-01 09:26:24,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:26:24,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:26:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:26:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:26:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:26:24,561 INFO L87 Difference]: Start difference. First operand 1233 states and 2122 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:26:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:26:25,430 INFO L93 Difference]: Finished difference Result 3835 states and 7018 transitions. [2023-04-01 09:26:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:26:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 171 [2023-04-01 09:26:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:26:25,450 INFO L225 Difference]: With dead ends: 3835 [2023-04-01 09:26:25,451 INFO L226 Difference]: Without dead ends: 2607 [2023-04-01 09:26:25,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:26:25,464 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 526 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:26:25,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 43 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:26:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2023-04-01 09:26:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2537. [2023-04-01 09:26:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2412 states have (on average 1.576285240464345) internal successors, (3802), 2501 states have internal predecessors, (3802), 18 states have call successors, (18), 18 states have call predecessors, (18), 106 states have return successors, (425), 17 states have call predecessors, (425), 17 states have call successors, (425) [2023-04-01 09:26:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 4245 transitions. [2023-04-01 09:26:25,572 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 4245 transitions. Word has length 171 [2023-04-01 09:26:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:26:25,573 INFO L495 AbstractCegarLoop]: Abstraction has 2537 states and 4245 transitions. [2023-04-01 09:26:25,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:26:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 4245 transitions. [2023-04-01 09:26:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-01 09:26:25,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:26:25,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:26:25,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:26:25,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:26:25,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:26:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash -215736178, now seen corresponding path program 1 times [2023-04-01 09:26:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:26:25,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254674772] [2023-04-01 09:26:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:26:25,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:26:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:26:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:26:26,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:26:26,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254674772] [2023-04-01 09:26:26,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254674772] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:26:26,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685397461] [2023-04-01 09:26:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:26:26,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:26:26,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:26:26,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:26:26,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:26:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:26:26,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:26:26,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:26:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:26:26,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:26:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685397461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:26:26,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:26:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:26:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997303879] [2023-04-01 09:26:26,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:26:26,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:26:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:26:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:26:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:26:26,540 INFO L87 Difference]: Start difference. First operand 2537 states and 4245 transitions. Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 09:26:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:26:26,990 INFO L93 Difference]: Finished difference Result 7711 states and 13617 transitions. [2023-04-01 09:26:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:26:26,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 179 [2023-04-01 09:26:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:26:27,023 INFO L225 Difference]: With dead ends: 7711 [2023-04-01 09:26:27,024 INFO L226 Difference]: Without dead ends: 5179 [2023-04-01 09:26:27,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:26:27,035 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 759 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:26:27,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 563 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:26:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2023-04-01 09:26:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 5103. [2023-04-01 09:26:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5103 states, 4839 states have (on average 1.5728456292622444) internal successors, (7611), 5035 states have internal predecessors, (7611), 34 states have call successors, (34), 34 states have call predecessors, (34), 229 states have return successors, (1071), 33 states have call predecessors, (1071), 33 states have call successors, (1071) [2023-04-01 09:26:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5103 states to 5103 states and 8716 transitions. [2023-04-01 09:26:27,266 INFO L78 Accepts]: Start accepts. Automaton has 5103 states and 8716 transitions. Word has length 179 [2023-04-01 09:26:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:26:27,266 INFO L495 AbstractCegarLoop]: Abstraction has 5103 states and 8716 transitions. [2023-04-01 09:26:27,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 09:26:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 5103 states and 8716 transitions. [2023-04-01 09:26:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 09:26:27,281 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:26:27,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:26:27,290 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 09:26:27,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:26:27,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:26:27,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:26:27,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1395154006, now seen corresponding path program 1 times [2023-04-01 09:26:27,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:26:27,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698408456] [2023-04-01 09:26:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:26:27,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:26:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:26:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:26:27,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:26:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698408456] [2023-04-01 09:26:27,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698408456] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:26:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274117248] [2023-04-01 09:26:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:26:27,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:26:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:26:27,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:26:27,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:26:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:26:28,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:26:28,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:26:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:26:28,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:26:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:26:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274117248] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:26:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172417144] [2023-04-01 09:26:28,362 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 09:26:28,363 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:26:28,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:26:28,372 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:26:28,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:26:29,888 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs