/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:19:06,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:19:06,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:19:06,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:19:06,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:19:06,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:19:06,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:19:06,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:19:06,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:19:06,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:19:06,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:19:06,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:19:06,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:19:06,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:19:06,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:19:06,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:19:06,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:19:06,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:19:06,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:19:06,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:19:06,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:19:06,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:19:06,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:19:06,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:19:06,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:19:06,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:19:06,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:19:06,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:19:06,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:19:06,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:19:06,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:19:06,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:19:06,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:19:06,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:19:06,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:19:06,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:19:06,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:19:06,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:19:06,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:19:06,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:19:06,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:19:06,859 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 03:19:06,901 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:19:06,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:19:06,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:19:06,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:19:06,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:19:06,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:19:06,905 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:19:06,905 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:19:06,905 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:19:06,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:19:06,906 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:19:06,906 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:19:06,907 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:19:06,907 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:19:06,907 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:19:06,907 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:19:06,907 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:19:06,907 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:19:06,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:19:06,908 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:19:06,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:19:06,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:19:06,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:19:06,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:19:06,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:19:06,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:19:06,913 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:19:06,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:19:06,913 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:19:06,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:19:06,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:19:06,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:19:06,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:19:06,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:19:06,914 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:19:06,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:19:06,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:19:06,914 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:19:06,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:19:06,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:19:06,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:19:06,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:19:07,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:19:07,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:19:07,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:19:07,199 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:19:07,200 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:19:07,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label54.c [2023-04-01 03:19:08,450 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:19:08,700 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:19:08,701 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label54.c [2023-04-01 03:19:08,711 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd14ea244/3c957cc186fe4cf4ab267416c0f919c7/FLAG4358094f0 [2023-04-01 03:19:08,724 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd14ea244/3c957cc186fe4cf4ab267416c0f919c7 [2023-04-01 03:19:08,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:19:08,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:19:08,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:19:08,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:19:08,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:19:08,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:19:08" (1/1) ... [2023-04-01 03:19:08,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61dcf00e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:08, skipping insertion in model container [2023-04-01 03:19:08,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:19:08" (1/1) ... [2023-04-01 03:19:08,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:19:08,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:19:09,075 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_label54.c[16901,16914] [2023-04-01 03:19:09,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:19:09,119 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:19:09,247 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_label54.c[16901,16914] [2023-04-01 03:19:09,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:19:09,279 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:19:09,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09 WrapperNode [2023-04-01 03:19:09,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:19:09,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:19:09,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:19:09,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:19:09,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,366 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:19:09,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:19:09,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:19:09,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:19:09,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (1/1) ... [2023-04-01 03:19:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:19:09,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:19:09,406 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 03:19:09,412 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 03:19:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:19:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:19:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:19:09,446 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:19:09,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:19:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:19:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:19:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:19:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:19:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:19:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:19:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:19:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:19:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:19:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:19:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:19:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:19:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:19:09,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:19:09,513 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:19:09,515 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:19:10,538 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:19:10,812 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:19:10,813 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:19:10,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:19:10 BoogieIcfgContainer [2023-04-01 03:19:10,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:19:10,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:19:10,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:19:10,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:19:10,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:19:08" (1/3) ... [2023-04-01 03:19:10,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b67e68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:19:10, skipping insertion in model container [2023-04-01 03:19:10,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:09" (2/3) ... [2023-04-01 03:19:10,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b67e68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:19:10, skipping insertion in model container [2023-04-01 03:19:10,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:19:10" (3/3) ... [2023-04-01 03:19:10,826 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2023-04-01 03:19:10,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:19:10,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:19:10,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:19:10,894 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;@2837ca01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:19:10,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:19:10,897 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 03:19:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 03:19:10,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:10,905 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 03:19:10,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:10,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2027411752, now seen corresponding path program 1 times [2023-04-01 03:19:10,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:10,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972407848] [2023-04-01 03:19:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:11,693 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 03:19:11,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972407848] [2023-04-01 03:19:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972407848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:11,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:19:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:19:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214274204] [2023-04-01 03:19:11,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:11,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:19:11,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:19:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:19:11,743 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 03:19:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:12,210 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 03:19:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:19:12,213 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 03:19:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:12,222 INFO L225 Difference]: With dead ends: 273 [2023-04-01 03:19:12,222 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 03:19:12,225 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 03:19:12,228 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:12,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 48 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:19:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 03:19:12,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 03:19:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.784431137724551) internal successors, (298), 167 states have internal predecessors, (298), 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 03:19:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 307 transitions. [2023-04-01 03:19:12,301 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 307 transitions. Word has length 86 [2023-04-01 03:19:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:12,301 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 307 transitions. [2023-04-01 03:19:12,302 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 03:19:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 307 transitions. [2023-04-01 03:19:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 03:19:12,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:12,306 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] [2023-04-01 03:19:12,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:19:12,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:12,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1969910228, now seen corresponding path program 1 times [2023-04-01 03:19:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207779509] [2023-04-01 03:19:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:12,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:12,583 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 03:19:12,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207779509] [2023-04-01 03:19:12,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207779509] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:12,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:19:12,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:19:12,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80375038] [2023-04-01 03:19:12,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:12,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:19:12,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:12,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:19:12,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:19:12,588 INFO L87 Difference]: Start difference. First operand 175 states and 307 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 03:19:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:13,119 INFO L93 Difference]: Finished difference Result 533 states and 961 transitions. [2023-04-01 03:19:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:19:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 98 [2023-04-01 03:19:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:13,125 INFO L225 Difference]: With dead ends: 533 [2023-04-01 03:19:13,125 INFO L226 Difference]: Without dead ends: 363 [2023-04-01 03:19:13,126 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 03:19:13,127 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 288 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:13,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 44 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:19:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-04-01 03:19:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2023-04-01 03:19:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.7373134328358208) internal successors, (582), 339 states have internal predecessors, (582), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 03:19:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 610 transitions. [2023-04-01 03:19:13,170 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 610 transitions. Word has length 98 [2023-04-01 03:19:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:13,175 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 610 transitions. [2023-04-01 03:19:13,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 03:19:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 610 transitions. [2023-04-01 03:19:13,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 03:19:13,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:13,180 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:19:13,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:19:13,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:13,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:13,183 INFO L85 PathProgramCache]: Analyzing trace with hash 255920954, now seen corresponding path program 1 times [2023-04-01 03:19:13,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:13,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182845316] [2023-04-01 03:19:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:13,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:13,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:13,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182845316] [2023-04-01 03:19:13,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182845316] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:13,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:19:13,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:19:13,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501500608] [2023-04-01 03:19:13,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:13,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:19:13,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:13,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:19:13,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:19:13,348 INFO L87 Difference]: Start difference. First operand 351 states and 610 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:19:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:13,636 INFO L93 Difference]: Finished difference Result 1039 states and 1862 transitions. [2023-04-01 03:19:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:19:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 99 [2023-04-01 03:19:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:13,641 INFO L225 Difference]: With dead ends: 1039 [2023-04-01 03:19:13,641 INFO L226 Difference]: Without dead ends: 693 [2023-04-01 03:19:13,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:19:13,645 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:13,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 190 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:19:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-04-01 03:19:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2023-04-01 03:19:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 666 states have (on average 1.6036036036036037) internal successors, (1068), 673 states have internal predecessors, (1068), 10 states have call successors, (10), 10 states have call predecessors, (10), 16 states have return successors, (73), 9 states have call predecessors, (73), 9 states have call successors, (73) [2023-04-01 03:19:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1151 transitions. [2023-04-01 03:19:13,680 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1151 transitions. Word has length 99 [2023-04-01 03:19:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:13,681 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 1151 transitions. [2023-04-01 03:19:13,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:19:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1151 transitions. [2023-04-01 03:19:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 03:19:13,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:13,686 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:19:13,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:19:13,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:13,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash -4790800, now seen corresponding path program 1 times [2023-04-01 03:19:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:13,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058800835] [2023-04-01 03:19:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:13,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:13,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:13,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058800835] [2023-04-01 03:19:13,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058800835] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:13,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:19:13,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:19:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051614911] [2023-04-01 03:19:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:13,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:19:13,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:19:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:19:13,859 INFO L87 Difference]: Start difference. First operand 693 states and 1151 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 03:19:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:14,314 INFO L93 Difference]: Finished difference Result 1953 states and 3505 transitions. [2023-04-01 03:19:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:19:14,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 100 [2023-04-01 03:19:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:14,323 INFO L225 Difference]: With dead ends: 1953 [2023-04-01 03:19:14,323 INFO L226 Difference]: Without dead ends: 1265 [2023-04-01 03:19:14,325 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 03:19:14,326 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 354 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:14,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 42 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:19:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2023-04-01 03:19:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1231. [2023-04-01 03:19:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1175 states have (on average 1.4782978723404254) internal successors, (1737), 1199 states have internal predecessors, (1737), 16 states have call successors, (16), 16 states have call predecessors, (16), 39 states have return successors, (224), 15 states have call predecessors, (224), 15 states have call successors, (224) [2023-04-01 03:19:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1977 transitions. [2023-04-01 03:19:14,382 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1977 transitions. Word has length 100 [2023-04-01 03:19:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:14,383 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1977 transitions. [2023-04-01 03:19:14,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 03:19:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1977 transitions. [2023-04-01 03:19:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 03:19:14,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:14,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:19:14,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:19:14,388 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:14,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1875728083, now seen corresponding path program 1 times [2023-04-01 03:19:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:14,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574492196] [2023-04-01 03:19:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:14,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:14,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574492196] [2023-04-01 03:19:14,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574492196] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:14,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:19:14,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:19:14,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557961489] [2023-04-01 03:19:14,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:14,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:19:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:19:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:19:14,597 INFO L87 Difference]: Start difference. First operand 1231 states and 1977 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 03:19:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:15,049 INFO L93 Difference]: Finished difference Result 2847 states and 4727 transitions. [2023-04-01 03:19:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:19:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 114 [2023-04-01 03:19:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:15,061 INFO L225 Difference]: With dead ends: 2847 [2023-04-01 03:19:15,061 INFO L226 Difference]: Without dead ends: 1621 [2023-04-01 03:19:15,065 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 03:19:15,069 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 251 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:15,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 44 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:19:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2023-04-01 03:19:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1607. [2023-04-01 03:19:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1523 states have (on average 1.418253447143795) internal successors, (2160), 1567 states have internal predecessors, (2160), 20 states have call successors, (20), 20 states have call predecessors, (20), 63 states have return successors, (361), 19 states have call predecessors, (361), 19 states have call successors, (361) [2023-04-01 03:19:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2541 transitions. [2023-04-01 03:19:15,141 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2541 transitions. Word has length 114 [2023-04-01 03:19:15,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:15,141 INFO L495 AbstractCegarLoop]: Abstraction has 1607 states and 2541 transitions. [2023-04-01 03:19:15,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 03:19:15,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2541 transitions. [2023-04-01 03:19:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 03:19:15,169 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:15,169 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:19:15,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 03:19:15,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:15,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash -936031639, now seen corresponding path program 1 times [2023-04-01 03:19:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:15,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69796382] [2023-04-01 03:19:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:15,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:15,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:15,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69796382] [2023-04-01 03:19:15,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69796382] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:19:15,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987053283] [2023-04-01 03:19:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:15,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:19:15,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:19:15,876 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 03:19:15,905 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 03:19:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:16,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:19:16,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:19:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:19:16,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:19:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987053283] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:16,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:19:16,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 03:19:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081062839] [2023-04-01 03:19:16,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:16,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:19:16,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:19:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:19:16,303 INFO L87 Difference]: Start difference. First operand 1607 states and 2541 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:19:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:16,648 INFO L93 Difference]: Finished difference Result 3721 states and 5903 transitions. [2023-04-01 03:19:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:19:16,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 121 [2023-04-01 03:19:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:16,657 INFO L225 Difference]: With dead ends: 3721 [2023-04-01 03:19:16,657 INFO L226 Difference]: Without dead ends: 1427 [2023-04-01 03:19:16,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:19:16,670 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:16,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 173 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:19:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-04-01 03:19:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1421. [2023-04-01 03:19:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1350 states have (on average 1.3251851851851852) internal successors, (1789), 1385 states have internal predecessors, (1789), 18 states have call successors, (18), 18 states have call predecessors, (18), 52 states have return successors, (249), 17 states have call predecessors, (249), 17 states have call successors, (249) [2023-04-01 03:19:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 2056 transitions. [2023-04-01 03:19:16,720 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 2056 transitions. Word has length 121 [2023-04-01 03:19:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:16,720 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 2056 transitions. [2023-04-01 03:19:16,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:19:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 2056 transitions. [2023-04-01 03:19:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 03:19:16,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:16,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:19:16,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:19:16,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 03:19:16,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:16,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1662760243, now seen corresponding path program 1 times [2023-04-01 03:19:16,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274794566] [2023-04-01 03:19:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:19:17,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:17,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274794566] [2023-04-01 03:19:17,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274794566] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:19:17,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732176081] [2023-04-01 03:19:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:17,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:19:17,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:19:17,146 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 03:19:17,151 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 03:19:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:17,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:19:17,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:19:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 03:19:17,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:19:17,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732176081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:17,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:19:17,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:19:17,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393080439] [2023-04-01 03:19:17,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:17,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:19:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:19:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:19:17,349 INFO L87 Difference]: Start difference. First operand 1421 states and 2056 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:19:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:17,768 INFO L93 Difference]: Finished difference Result 3599 states and 5478 transitions. [2023-04-01 03:19:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:19:17,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 123 [2023-04-01 03:19:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:17,779 INFO L225 Difference]: With dead ends: 3599 [2023-04-01 03:19:17,779 INFO L226 Difference]: Without dead ends: 2183 [2023-04-01 03:19:17,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 03:19:17,782 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 344 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:17,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 46 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:19:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2023-04-01 03:19:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 2137. [2023-04-01 03:19:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2028 states have (on average 1.277120315581854) internal successors, (2590), 2085 states have internal predecessors, (2590), 26 states have call successors, (26), 26 states have call predecessors, (26), 82 states have return successors, (368), 25 states have call predecessors, (368), 25 states have call successors, (368) [2023-04-01 03:19:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2984 transitions. [2023-04-01 03:19:17,857 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2984 transitions. Word has length 123 [2023-04-01 03:19:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:17,857 INFO L495 AbstractCegarLoop]: Abstraction has 2137 states and 2984 transitions. [2023-04-01 03:19:17,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:19:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2984 transitions. [2023-04-01 03:19:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 03:19:17,863 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:17,863 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:19:17,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:19:18,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-04-01 03:19:18,073 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:18,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash 363651713, now seen corresponding path program 1 times [2023-04-01 03:19:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:18,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346340247] [2023-04-01 03:19:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 03:19:18,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:18,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346340247] [2023-04-01 03:19:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346340247] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:19:18,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029088190] [2023-04-01 03:19:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:18,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:19:18,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:19:18,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:19:18,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:19:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:18,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:19:18,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:19:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 03:19:18,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:19:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:19:18,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029088190] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:19:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886658961] [2023-04-01 03:19:19,016 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 03:19:19,016 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:19:19,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:19:19,025 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:19:19,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:19:19,299 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-04-01 03:19:24,983 WARN L223 SmtUtils]: Spent 5.05s 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)