/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:18:47,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:18:47,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:18:47,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:18:47,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:18:47,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:18:47,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:18:47,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:18:47,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:18:47,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:18:47,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:18:47,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:18:47,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:18:47,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:18:47,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:18:47,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:18:47,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:18:47,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:18:47,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:18:47,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:18:47,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:18:47,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:18:47,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:18:47,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:18:47,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:18:47,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:18:47,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:18:47,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:18:47,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:18:47,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:18:47,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:18:47,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:18:47,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:18:47,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:18:47,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:18:47,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:18:47,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:18:47,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:18:47,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:18:47,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:18:47,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:18:47,822 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 03:18:47,851 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:18:47,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:18:47,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:18:47,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:18:47,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:18:47,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:18:47,854 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:18:47,854 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:18:47,854 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:18:47,854 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:18:47,854 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:18:47,854 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:18:47,854 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:18:47,855 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:18:47,855 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:18:47,855 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:18:47,855 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:18:47,855 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:18:47,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:18:47,856 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:18:47,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:18:47,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:18:47,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:18:47,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:18:47,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:18:47,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:18:47,857 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:18:47,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:18:47,857 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:18:47,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:18:47,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:18:47,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:18:47,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:18:47,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:18:47,858 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:18:47,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:18:47,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:18:47,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:18:47,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:18:47,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:18:47,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:18:47,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:18:48,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:18:48,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:18:48,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:18:48,214 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:18:48,215 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:18:48,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label51.c [2023-04-01 03:18:49,517 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:18:49,686 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:18:49,687 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label51.c [2023-04-01 03:18:49,695 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94850bb46/31226289cdc344ef86e22e8a01d0141c/FLAG4c9a28087 [2023-04-01 03:18:49,705 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94850bb46/31226289cdc344ef86e22e8a01d0141c [2023-04-01 03:18:49,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:18:49,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:18:49,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:18:49,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:18:49,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:18:49,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:18:49" (1/1) ... [2023-04-01 03:18:49,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c55187f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:49, skipping insertion in model container [2023-04-01 03:18:49,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:18:49" (1/1) ... [2023-04-01 03:18:49,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:18:49,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:18:50,199 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label51.c[17924,17937] [2023-04-01 03:18:50,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:18:50,226 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:18:50,320 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label51.c[17924,17937] [2023-04-01 03:18:50,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:18:50,356 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:18:50,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50 WrapperNode [2023-04-01 03:18:50,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:18:50,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:18:50,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:18:50,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:18:50,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:18:50,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:18:50,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:18:50,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:18:50,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (1/1) ... [2023-04-01 03:18:50,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:18:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:18:50,550 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 03:18:50,553 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 03:18:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:18:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:18:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:18:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:18:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:18:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:18:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:18:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:18:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:18:50,654 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:18:50,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:18:51,563 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:18:51,754 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:18:51,755 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:18:51,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:18:51 BoogieIcfgContainer [2023-04-01 03:18:51,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:18:51,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:18:51,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:18:51,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:18:51,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:18:49" (1/3) ... [2023-04-01 03:18:51,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8260f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:18:51, skipping insertion in model container [2023-04-01 03:18:51,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:50" (2/3) ... [2023-04-01 03:18:51,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8260f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:18:51, skipping insertion in model container [2023-04-01 03:18:51,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:18:51" (3/3) ... [2023-04-01 03:18:51,766 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label51.c [2023-04-01 03:18:51,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:18:51,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:18:51,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:18:51,824 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;@2d6f2a6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:18:51,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:18:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:18:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 03:18:51,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:51,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:18:51,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:51,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:51,838 INFO L85 PathProgramCache]: Analyzing trace with hash -818167209, now seen corresponding path program 1 times [2023-04-01 03:18:51,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:51,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626067836] [2023-04-01 03:18:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:52,395 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 03:18:52,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:52,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626067836] [2023-04-01 03:18:52,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626067836] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:52,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:52,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:18:52,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546242392] [2023-04-01 03:18:52,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:52,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:18:52,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:18:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:18:52,424 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:18:52,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:52,825 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 03:18:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:18:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-01 03:18:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:52,841 INFO L225 Difference]: With dead ends: 273 [2023-04-01 03:18:52,842 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 03:18:52,845 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 03:18:52,850 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:52,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 03:18:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 03:18:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.7544910179640718) internal successors, (293), 167 states have internal predecessors, (293), 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 03:18:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 302 transitions. [2023-04-01 03:18:52,898 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 302 transitions. Word has length 86 [2023-04-01 03:18:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:52,898 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 302 transitions. [2023-04-01 03:18:52,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:18:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 302 transitions. [2023-04-01 03:18:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 03:18:52,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:52,902 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] [2023-04-01 03:18:52,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:18:52,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:52,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash 242736582, now seen corresponding path program 1 times [2023-04-01 03:18:52,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:52,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720413547] [2023-04-01 03:18:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:52,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:53,110 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 03:18:53,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:53,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720413547] [2023-04-01 03:18:53,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720413547] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:53,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:53,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:18:53,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028419483] [2023-04-01 03:18:53,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:53,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:18:53,114 INFO L87 Difference]: Start difference. First operand 175 states and 302 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 03:18:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:53,473 INFO L93 Difference]: Finished difference Result 537 states and 947 transitions. [2023-04-01 03:18:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:18:53,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 108 [2023-04-01 03:18:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:53,477 INFO L225 Difference]: With dead ends: 537 [2023-04-01 03:18:53,477 INFO L226 Difference]: Without dead ends: 367 [2023-04-01 03:18:53,478 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 03:18:53,479 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 275 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:53,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 97 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-04-01 03:18:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 351. [2023-04-01 03:18:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.6746268656716419) internal successors, (561), 339 states have internal predecessors, (561), 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 03:18:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 588 transitions. [2023-04-01 03:18:53,512 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 588 transitions. Word has length 108 [2023-04-01 03:18:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:53,518 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 588 transitions. [2023-04-01 03:18:53,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 03:18:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 588 transitions. [2023-04-01 03:18:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 03:18:53,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:53,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:18:53,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:18:53,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:53,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:53,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1171130198, now seen corresponding path program 1 times [2023-04-01 03:18:53,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:53,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426207765] [2023-04-01 03:18:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:53,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:18:53,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426207765] [2023-04-01 03:18:53,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426207765] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:53,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:53,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:18:53,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696460974] [2023-04-01 03:18:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:53,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:53,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:18:53,880 INFO L87 Difference]: Start difference. First operand 351 states and 588 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 03:18:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:54,237 INFO L93 Difference]: Finished difference Result 1091 states and 1910 transitions. [2023-04-01 03:18:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:18:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 119 [2023-04-01 03:18:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:54,242 INFO L225 Difference]: With dead ends: 1091 [2023-04-01 03:18:54,242 INFO L226 Difference]: Without dead ends: 745 [2023-04-01 03:18:54,247 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 03:18:54,249 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 305 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:54,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 48 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-04-01 03:18:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 721. [2023-04-01 03:18:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 680 states have (on average 1.575) internal successors, (1071), 701 states have internal predecessors, (1071), 10 states have call successors, (10), 10 states have call predecessors, (10), 30 states have return successors, (87), 9 states have call predecessors, (87), 9 states have call successors, (87) [2023-04-01 03:18:54,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1168 transitions. [2023-04-01 03:18:54,299 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1168 transitions. Word has length 119 [2023-04-01 03:18:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:54,300 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1168 transitions. [2023-04-01 03:18:54,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 03:18:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1168 transitions. [2023-04-01 03:18:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 03:18:54,309 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:54,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:18:54,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:18:54,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:54,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1877085342, now seen corresponding path program 1 times [2023-04-01 03:18:54,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:54,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48938556] [2023-04-01 03:18:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:54,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:18:54,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:54,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48938556] [2023-04-01 03:18:54,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48938556] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:18:54,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830500540] [2023-04-01 03:18:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:54,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:18:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:18:54,852 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 03:18:54,862 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 03:18:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:54,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:18:54,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:18:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:18:55,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:18:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:18:55,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830500540] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:18:55,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109434755] [2023-04-01 03:18:55,240 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 03:18:55,241 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:18:55,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:18:55,247 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:18:55,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:18:55,474 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-04-01 03:19:01,261 WARN L223 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 488 DAG size of output: 489 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)