/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:05:29,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:05:29,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:05:29,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:05:29,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:05:29,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:05:29,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:05:29,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:05:29,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:05:29,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:05:29,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:05:29,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:05:29,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:05:29,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:05:29,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:05:29,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:05:29,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:05:29,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:05:29,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:05:29,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:05:29,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:05:29,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:05:29,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:05:29,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:05:29,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:05:29,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:05:29,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:05:29,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:05:29,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:05:29,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:05:29,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:05:29,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:05:29,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:05:29,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:05:29,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:05:29,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:05:29,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:05:29,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:05:29,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:05:29,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:05:29,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:05:29,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:05:29,749 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:05:29,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:05:29,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:05:29,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:05:29,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:05:29,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:05:29,750 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:05:29,750 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:05:29,751 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:05:29,751 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:05:29,751 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:05:29,752 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:05:29,752 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:05:29,752 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:05:29,752 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:05:29,752 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:05:29,752 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:05:29,752 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:05:29,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:05:29,753 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:05:29,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:05:29,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:05:29,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:05:29,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:05:29,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:05:29,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:05:29,754 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:05:29,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:05:29,754 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:05:29,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:05:29,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:05:29,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:05:29,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:05:29,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:05:29,755 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:05:29,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:05:29,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:05:29,756 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:05:29,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:05:29,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:05:29,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:05:29,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:05:29,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:05:29,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:05:29,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:05:29,996 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:05:29,996 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:05:29,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label46.c [2023-04-01 10:05:31,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:05:31,523 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:05:31,523 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label46.c [2023-04-01 10:05:31,548 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/255a44fb9/029fa48f46ec4dbda8176f7438c56ddb/FLAG67b6993c1 [2023-04-01 10:05:31,561 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/255a44fb9/029fa48f46ec4dbda8176f7438c56ddb [2023-04-01 10:05:31,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:05:31,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:05:31,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:05:31,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:05:31,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:05:31,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:05:31" (1/1) ... [2023-04-01 10:05:31,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1619613d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:31, skipping insertion in model container [2023-04-01 10:05:31,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:05:31" (1/1) ... [2023-04-01 10:05:31,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:05:31,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:05:31,891 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/Problem12_label46.c[7526,7539] [2023-04-01 10:05:32,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:05:32,579 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:05:32,610 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/Problem12_label46.c[7526,7539] [2023-04-01 10:05:32,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:05:32,948 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:05:32,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32 WrapperNode [2023-04-01 10:05:32,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:05:32,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:05:32,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:05:32,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:05:32,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:32,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:33,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:33,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:33,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:33,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:33,176 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:33,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:33,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:05:33,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:05:33,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:05:33,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:05:33,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (1/1) ... [2023-04-01 10:05:33,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:05:33,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:33,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:05:33,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:05:33,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:05:33,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:05:33,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:05:33,287 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:05:33,287 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:05:33,288 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:05:33,288 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:05:33,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:05:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:05:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:05:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:05:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:05:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:05:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:05:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:05:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:05:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:05:33,412 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:05:33,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:05:37,036 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:05:37,578 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:05:37,578 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:05:37,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:05:37 BoogieIcfgContainer [2023-04-01 10:05:37,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:05:37,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:05:37,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:05:37,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:05:37,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:05:31" (1/3) ... [2023-04-01 10:05:37,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5414c9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:05:37, skipping insertion in model container [2023-04-01 10:05:37,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:32" (2/3) ... [2023-04-01 10:05:37,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5414c9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:05:37, skipping insertion in model container [2023-04-01 10:05:37,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:05:37" (3/3) ... [2023-04-01 10:05:37,589 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label46.c [2023-04-01 10:05:37,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:05:37,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:05:37,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:05:37,676 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;@cc6b3fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:05:37,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:05:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:05:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:05:37,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:37,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:37,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:37,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash 636350532, now seen corresponding path program 1 times [2023-04-01 10:05:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:37,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144493978] [2023-04-01 10:05:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:38,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:38,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144493978] [2023-04-01 10:05:38,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144493978] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:38,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:38,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:05:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76644607] [2023-04-01 10:05:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:38,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:05:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:38,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:05:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:05:38,074 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:05:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:41,255 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:05:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:05:41,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:05:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:41,278 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:05:41,278 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:05:41,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:05:41,288 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 803 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:41,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 270 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2101 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:05:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:05:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 10:05:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.821826280623608) internal successors, (2454), 1347 states have internal predecessors, (2454), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:05:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2477 transitions. [2023-04-01 10:05:41,400 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2477 transitions. Word has length 11 [2023-04-01 10:05:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:41,400 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2477 transitions. [2023-04-01 10:05:41,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:05:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2477 transitions. [2023-04-01 10:05:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 10:05:41,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:41,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:41,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:05:41,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:41,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash 90496733, now seen corresponding path program 1 times [2023-04-01 10:05:41,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:41,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362177637] [2023-04-01 10:05:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:41,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:41,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362177637] [2023-04-01 10:05:41,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362177637] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:05:41,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541754761] [2023-04-01 10:05:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:41,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:41,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:05:41,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:05:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:41,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:05:41,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:05:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:41,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:05:41,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541754761] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:41,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:05:41,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 10:05:41,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976218395] [2023-04-01 10:05:41,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:41,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:05:41,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:05:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:05:41,799 INFO L87 Difference]: Start difference. First operand 1365 states and 2477 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:05:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:45,033 INFO L93 Difference]: Finished difference Result 4081 states and 7455 transitions. [2023-04-01 10:05:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:05:45,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 27 [2023-04-01 10:05:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:45,047 INFO L225 Difference]: With dead ends: 4081 [2023-04-01 10:05:45,048 INFO L226 Difference]: Without dead ends: 2721 [2023-04-01 10:05:45,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:05:45,053 INFO L413 NwaCegarLoop]: 1214 mSDtfsCounter, 686 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:45,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1242 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:05:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2023-04-01 10:05:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2718. [2023-04-01 10:05:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2688 states have (on average 1.6986607142857142) internal successors, (4566), 2688 states have internal predecessors, (4566), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50) [2023-04-01 10:05:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4631 transitions. [2023-04-01 10:05:45,134 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4631 transitions. Word has length 27 [2023-04-01 10:05:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:45,134 INFO L495 AbstractCegarLoop]: Abstraction has 2718 states and 4631 transitions. [2023-04-01 10:05:45,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:05:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4631 transitions. [2023-04-01 10:05:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:05:45,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:45,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:45,147 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 10:05:45,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:45,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:45,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1094647531, now seen corresponding path program 1 times [2023-04-01 10:05:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:45,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579196114] [2023-04-01 10:05:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:45,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:45,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579196114] [2023-04-01 10:05:45,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579196114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:45,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:45,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:05:45,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695642991] [2023-04-01 10:05:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:45,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:45,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:45,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:05:45,542 INFO L87 Difference]: Start difference. First operand 2718 states and 4631 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:49,385 INFO L93 Difference]: Finished difference Result 8254 states and 14243 transitions. [2023-04-01 10:05:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:05:49,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 10:05:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:49,421 INFO L225 Difference]: With dead ends: 8254 [2023-04-01 10:05:49,421 INFO L226 Difference]: Without dead ends: 5541 [2023-04-01 10:05:49,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:05:49,430 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2798 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2798 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 4355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:49,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 86 Invalid, 4355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:05:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2023-04-01 10:05:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 5489. [2023-04-01 10:05:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 5409 states have (on average 1.5289332593825107) internal successors, (8270), 5419 states have internal predecessors, (8270), 27 states have call successors, (27), 27 states have call predecessors, (27), 52 states have return successors, (247), 42 states have call predecessors, (247), 26 states have call successors, (247) [2023-04-01 10:05:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 8544 transitions. [2023-04-01 10:05:49,587 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 8544 transitions. Word has length 31 [2023-04-01 10:05:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:49,587 INFO L495 AbstractCegarLoop]: Abstraction has 5489 states and 8544 transitions. [2023-04-01 10:05:49,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 8544 transitions. [2023-04-01 10:05:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:05:49,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:49,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:49,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:05:49,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:49,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash 330451878, now seen corresponding path program 1 times [2023-04-01 10:05:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:49,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573934479] [2023-04-01 10:05:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:49,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573934479] [2023-04-01 10:05:49,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573934479] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:49,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:49,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:05:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448941101] [2023-04-01 10:05:49,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:49,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:49,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:05:49,776 INFO L87 Difference]: Start difference. First operand 5489 states and 8544 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:54,023 INFO L93 Difference]: Finished difference Result 16764 states and 27180 transitions. [2023-04-01 10:05:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:05:54,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42 [2023-04-01 10:05:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:54,071 INFO L225 Difference]: With dead ends: 16764 [2023-04-01 10:05:54,071 INFO L226 Difference]: Without dead ends: 11280 [2023-04-01 10:05:54,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:05:54,084 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2087 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4705 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 4705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:54,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2087 Valid, 90 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 4705 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 10:05:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11280 states. [2023-04-01 10:05:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11280 to 10967. [2023-04-01 10:05:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10967 states, 10721 states have (on average 1.3593881167801511) internal successors, (14574), 10776 states have internal predecessors, (14574), 51 states have call successors, (51), 51 states have call predecessors, (51), 194 states have return successors, (1255), 139 states have call predecessors, (1255), 50 states have call successors, (1255) [2023-04-01 10:05:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15880 transitions. [2023-04-01 10:05:54,349 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 15880 transitions. Word has length 42 [2023-04-01 10:05:54,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:54,350 INFO L495 AbstractCegarLoop]: Abstraction has 10967 states and 15880 transitions. [2023-04-01 10:05:54,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 15880 transitions. [2023-04-01 10:05:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 10:05:54,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:54,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:54,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:05:54,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:54,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1620742129, now seen corresponding path program 1 times [2023-04-01 10:05:54,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:54,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818906278] [2023-04-01 10:05:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:54,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:54,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:54,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818906278] [2023-04-01 10:05:54,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818906278] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:54,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:54,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:05:54,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692446298] [2023-04-01 10:05:54,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:54,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:54,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:54,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:05:54,600 INFO L87 Difference]: Start difference. First operand 10967 states and 15880 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:58,228 INFO L93 Difference]: Finished difference Result 31960 states and 49363 transitions. [2023-04-01 10:05:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:05:58,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 65 [2023-04-01 10:05:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:58,386 INFO L225 Difference]: With dead ends: 31960 [2023-04-01 10:05:58,386 INFO L226 Difference]: Without dead ends: 20998 [2023-04-01 10:05:58,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:05:58,414 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2392 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2392 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1284 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:58,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2392 Valid, 101 Invalid, 5044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1284 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:05:58,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20998 states. [2023-04-01 10:05:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20998 to 20784. [2023-04-01 10:05:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20784 states, 20289 states have (on average 1.3296860367686925) internal successors, (26978), 20420 states have internal predecessors, (26978), 94 states have call successors, (94), 94 states have call predecessors, (94), 400 states have return successors, (3305), 269 states have call predecessors, (3305), 93 states have call successors, (3305) [2023-04-01 10:05:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20784 states to 20784 states and 30377 transitions. [2023-04-01 10:05:58,889 INFO L78 Accepts]: Start accepts. Automaton has 20784 states and 30377 transitions. Word has length 65 [2023-04-01 10:05:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:58,890 INFO L495 AbstractCegarLoop]: Abstraction has 20784 states and 30377 transitions. [2023-04-01 10:05:58,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 20784 states and 30377 transitions. [2023-04-01 10:05:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 10:05:58,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:58,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:05:58,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:05:58,893 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:58,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1374074394, now seen corresponding path program 1 times [2023-04-01 10:05:58,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:58,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975630047] [2023-04-01 10:05:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:58,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:05:59,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975630047] [2023-04-01 10:05:59,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975630047] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:05:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207693261] [2023-04-01 10:05:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:59,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:59,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:59,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:05:59,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:05:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:59,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:05:59,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:05:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:05:59,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:05:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:05:59,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207693261] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:05:59,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [361396190] [2023-04-01 10:05:59,773 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 10:05:59,773 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:05:59,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:05:59,780 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:05:59,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:06:00,070 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:06:00,424 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2023-04-01 10:06:01,800 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 10:06:01,878 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 23808 conjuctions. This might take some time... [2023-04-01 10:06:06,867 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 2880 conjuctions. [2023-04-01 10:06:15,256 WARN L223 SmtUtils]: Spent 7.55s on a formula simplification that was a NOOP. DAG size: 959 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)